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Factors Explaining Variations in Soluble Solids Content of Apples during Ripening and Storage Hort. J. (IF 1.2) Pub Date : 2024-03-16 Hiroshi Iwanami, Yuki Moriya-Tanaka, Toshio Hanada, Takashi Baba, Daisuke Sakamoto
Sweetness is one of the most important drivers of consumer preference in apples (Malus × domestica Borkh.). The increase in sugar during the ripening period of fruit is mainly brought about by the hydrolysis of starch accumulated before the ripening period. However, sugars are also continuously translocated into the fruit during the ripening period, as seen in watercored fruits. The objective of this
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Influence of Gamma Irradiation on Pollen Viability, Pollen Tube Growth, and Fruit Development in Tomato (Solanum lycopersicum L.) Hort. J. (IF 1.2) Pub Date : 2024-03-16 Kadriye Yaprak Kantoğlu
The goal of this study was to assess whether irradiated pollen technology could be used in tomato breeding research. The effects of irradiation on pollen viability, fruit set rate, and embryo formation were investigated. For this purpose, pollens were exposed to gamma rays of 0, 50, 100, 200, 300, and 400 Grays (Gy). The effect of irradiation on pollen viability and tube growth was found to be significant
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Analysis of Floral Scent Components of Roses Exhibiting an Unusual Odor: Identification of Stink Bug Pheromone Compounds in Roses Hort. J. (IF 1.2) Pub Date : 2024-03-16 Naomi Oyama-Okubo, Yuki Mikanagi
Flowers of the early Polyantha roses, ‘Pâquerette’, ‘Mignonette’ and ‘Anne-Marie de Montravel’, have an unusual odor not found in other roses. Their ancestor is Rosa multiflora, a wild species native to Japan. In particular, ‘Anne-Marie de Montravel’ has a citrus scent with an old wooden closet-like odor. Gas chromatography (GC)-mass spectrometry analysis of the scent components of these roses revealed
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Lisianthus Flowers Emitted Volatile Components Including Iridoids and Actinidine Which Attract Cats Hort. J. (IF 1.2) Pub Date : 2024-03-12 Naomi Oyama-Okubo, Naoko Fukuta
Lisianthus (Eustoma grandiflorum [Raf.] Shinners) is one of the world’s major cut flowers, characterized by its wide variety of flower colors, flower shapes, long stem, and long vase life. Lisianthus is said to be scentless, but there are cultivars that have a weak or faint scent. Cats exhibit a characteristic response to lisianthus flowers similar to their response to Actinidia polygama leaves, which
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Identification of a Gene Conferring Moderate Susceptibility to Alternaria Blotch (Alternaria alternata apple pathotype) in ‘Golden Delicious’ Apples (Malus × domestica Borkh.) Hort. J. (IF 1.2) Pub Date : 2024-03-12 Shigeki Moriya, Kazuyuki Abe, Kazuma Okada, Taku Shimizu, Miyuki Kunihisa, Ayato Hori, Yutaka Sawamura
Alternaria blotch, a major apple (Malus × domestica Borkh.) fungal disease in Japan, is caused by the Alternaria alternata apple pathotype that produces a host-selective toxin called AM-toxin. Although control of Alternaria blotch currently relies on spring-to-summer fungicide use, there is a growing need for sustainable agriculture practices that reduce chemical inputs in orchards. Therefore, breeding
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The Effect of Gibberellin and an Ethylene Inhibitor on Twining of Vine Cuttings in Japanese Morning Glory (Ipomoea nil (L.) Roth) Hort. J. (IF 1.2) Pub Date : 2024-02-07 Tomoe Yofune, Nanami Matsumoto, Miyuki Funamoto, Tsuyoshi Kaneta
“Twining” along other objects is an important morphogenetic survival response of vine plants. The twining response, induced by the stimulus of touching a supporting object, is a form of “thigmomorphogenesis”. Ethylene is thought to play an important role in thigmomorphogenesis in higher plants, so it is likely to be involved in vine twining. However, the relationship between ethylene and vine twining
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Inhibition of Malformed Incurved Flowers in the Cut Rose Cultivar ‘Yves Piaget’ by Methyl Jasmonate Spray Treatment of Flower Buds before Harvest Hort. J. (IF 1.2) Pub Date : 2024-02-07 Rei Kaneeda, Yuri Kanno, Mitsunori Seo, Keith Hardie, Takashi Handa
In the most popular fragrant rose cultivar in Japan, ‘Yves Piaget’, the petal edges are frequently malformed, curving toward the adaxial side. These malformed petals prevent normal flowering and weaken the flower fragrance, which significantly decreases the quality of this cultivar and increases financial losses of cut flowers. We refer to such malformed flowers as ‘incurved flowers’. It has been reported
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The Vase Life of Cut Gerbera Flowers is Extended by Combined Treatment with Gibberellin A3 and Calcium Chloride Hort. J. (IF 1.2) Pub Date : 2024-01-31 Makoto Tonooka, Akari Iriya, Kazuo Ichimura
Treatment with calcium chloride (CaCl2) is known to suppress the occurrence of flower stem bending and extend the vase life of cut gerbera. To clarify whether vase life extension by CaCl2 is improved by combined treatment with gibberellin A3 (GA3), the effect of treatment with 50 mg·L−1 GA3, 5 g·L−1 CaCl2 or in combination on the vase life of the cut gerbera ʻMinouʼ was investigated. To inhibit bacterial
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Growth, Yield, and Fruit Quality of Own-rooted ‘Irwin’ Mango Trees Propagated by Air Layering in Pot Culture Hort. J. (IF 1.2) Pub Date : 2024-01-27 Masahiko Fumuro
To investigate the practicality of using own-rooted trees in pot culture, the growth, yield, and fruit quality of pot-planted ‘Irwin’ mango trees, propagated by air layering versus grafting, over an 11-year period after planting were measured. The trunk diameter of the own-rooted trees propagated by air layering was significantly smaller than that of the grafted trees propagated by conventional methods
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Effects of Air and CO2 Application within a Strawberry Plant Canopy on Fruit Yield and Dry Matter Production during Summer and Autumn Culture Hort. J. (IF 1.2) Pub Date : 2024-01-27 Yuya Mochizuki, Ryuta Ninohei, Manato Ohishi, Yukio Yonezu, Tsuyoshi Okayama, Eiichi Inoue
Strawberries can be categorized into June-bearing and ever-bearing depending on the environmental conditions that determine flower bud initiation. In Japan, the harvest yield and distribution of strawberry fruits during summer and autumn are low because of high temperatures and heavy fruit load. Therefore, cultivation of ever-bearing strawberries is limited to areas with cool summers such as Hokkaido
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Transcriptome Analysis Highlights the Molecular Mechanisms Associated with the Senescence of Florets in Gladiolus Hort. J. (IF 1.2) Pub Date : 2024-01-27 Kazuki Yamazaki, Rika Kitamura, Tomohiro Suzuki, Takeshi Kurokura, Kenji Yamane
Gladiolus (Gladiolus spp.) florets exhibit low ethylene sensitivity. Accordingly, the wilting of their tepals is an ethylene-independent process. Both trehalose and cycloheximide can extend the vase life of gladiolus florets. Floral senescence is probably regulated by programmed cell death. However, senescence-related genes have not been thoroughly investigated, except in ethylene-sensitive species
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Anatomical Study of Passion Fruit Aril Structure and Juice Quality in Different Aril Parts Hort. J. (IF 1.2) Pub Date : 2024-01-27 Tomohiro Kondo, Hirokazu Higuchi
Passion fruit has edible arils with a complicated structure. Each aril has three different membranes; an external membrane, an internal membrane with a fimbriate structure at the basal area, and a transparent membrane that completely envelops the seed. It was reported that juice quality, including organic acid and sugar contents, varied depending on the extraction method. So, organic acid and sugar
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Models for Predicting Pineapple Flowering and Harvest Dates Hort. J. (IF 1.2) Pub Date : 2024-01-27 Toshihiko Sugiura, Makoto Takeuchi, Takuya Kobayashi, Yuta Omine, Itaru Yonaha, Shohei Konno, Moriyuki Shoda
The growing-degree-days (GDD) model for pineapple was developed to predict flowering and harvest dates; however, it has not been adapted to the climate in Japan’s growing regions, where air temperatures fluctuate over a wide range, and the prediction accuracy is low. The present study aimed to develop models for predicting flowering and harvest dates with high accuracy by analyzing a large phenological
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Postharvest UV-C Treatment Affects Bioactive Compounds and Maintains Quality of Okra (Abelmoschus esculentus L.) during Storage Hort. J. (IF 1.2) Pub Date : 2024-01-27 Chairat Techavuthiporn, Amnat Jarerat, Chonlada Singhkai, Hataitip Nimitkeatkai
The effects of UV-C treatment on physicochemical quality, bioactive compounds and antioxidant activity of okra (Abelmoschus esculentus L.) during storage were investigated. Okra pods were exposed to UV-C irradiation dose at 1.5, 3.0 or 6.0 kJ·m−2 before storage at 10 ± 2°C for 12 days. The results showed that UV-C treatment had a significant effect on okra bioactive compounds, such as ascorbic acid
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Impact of Electrostatic Atomized Water Particles Treatment on Chlorophyll Degradation and Delay Ripening in a Thai Banana (Musa × paradisiaca, cv. ‘Namwa’ Banana) during Storage Hort. J. (IF 1.2) Pub Date : 2024-01-27 Nurainee Salaemae, Nutthachai Pongprasert, Surisa Phornvillay, Samak Kaewsuksaeng, Masayoshi Shigyo, Shinichi Ito, Naoki Yamauchi, Varit Srilaong
Electrostatic atomized water particles (EAWPs) treatment was applied to investigate its effect on chlorophyll (Chl) degradation and ripening delay in ‘Namwa’ bananas. Banana fruits were pretreated with EAWPs generated from a device (Panasonic F-GMK01) for 0 (control), 0.5, 1.0, 1.5, and 3.0 h in a closed 50 L container, and then kept in perforated polypropylene plastic bags and stored at ambient temperature
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Repeated Applications of a Mixture of Gibberellin A3 and 6-benzyladenine Increase the Feather Number on Apple Nursery Trees in the Current Year of Grafting Hort. J. (IF 1.2) Pub Date : 2024-01-27 Kazuma Okada, Masato Wada, Taku Shimizu, Shigeki Moriya, Kazuyuki Abe
The Tall Spindle apple (Malus × domestica Borkh.) planting system achieves high early and sustained yields and excellent fruit quality. This system requires high-density planting (1,000–1,500 trees/acre) of highly branched (feathered) nursery trees, which increases the total cost of nursery trees purchased. To supply large quantities of highly feathered nursery trees at low prices, the nursery cycle
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Pollen Dispersion is a Key Factor for Autonomous Fruit Set under High Temperatures in the Capsicum annuum ‘Takanotsume’ Hort. J. (IF 1.2) Pub Date : 2024-01-27 Akira Yamazaki, Ao Takezawa, Kazusa Nishimura, Ko Motoki, Kyoka Nagasaka, Ryohei Nakano, Tetsuya Nakazaki, Munetaka Hosokawa
Chili pepper is cultivated in the absence of fruit-promoting treatments or insect pollinators. The fertilization ability of both males and females, as well as natural self-pollination ability under high temperatures, are necessary for autonomous set fruit under high temperatures. The reproductive traits related to autonomous self-pollination ability and fertilization ability of both males and females
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Optimization of Pollen Germination Medium and Pollen Collection in Two Japanese Strawberry Cultivars Hort. J. (IF 1.2) Pub Date : 2024-01-27 Miyu Yamaguchi, Amane Yamazaki, Masako Akutsu
Strawberries, the most economically well-known berry crop, are known for their taste, nutritional value, and antioxidant compounds. Various spatiotemporal or seasonal factors are known to affect the strawberry pollen germination rate; however, determinating which factor most influences the variation in the pollen germination rate remains challenging. This study aimed to determine the optimal pollen
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Anthocyanins and Flavonols from the Flowers of Ranunculus Cultivars (Ranunculaceae) and Their Color Expression Hort. J. (IF 1.2) Pub Date : 2024-01-23 Qi Qin, Fumi Tatsuzawa, Takahisa Nakane, Takashi Kaidzuka, Tsukasa Iwashina, Takayuki Mizuno
Isolation, purification and identification of anthocyanins and flavonols were carried out on flowers of Ranunculus cultivars. Three anthocyanins and 11 flavonols were characterized by chemical and spectroscopic techniques. The anthocyanins were identified as cyanidin 3-O-sambubioside, cyanidin 3-O-(6''-malonylsambubioside) and delphinidin 3-O-(6''-malonylsambubioside). The flavonols were identified
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An 18.5-kbp Deletion in the Genomic Region, Including the Pun1, is Responsible for Non-pungency Traits in the Japanese Sweet Pepper ‘Sampo Oamanaga’ (Capsicum annuum) Hort. J. (IF 1.2) Pub Date : 2024-01-16 Moe Yamaguchi, Kondo Fumiya, Kazuhiro Nemoto, Kenichi Matsushima
Capsaicinoids are compounds that generate the characteristic pungent taste of chili peppers, the presence or absence of which determines the utilization of the chili peppers as spices or vegetables. Loss of pungency is a qualitative trait resulting from dysfunction in any of four capsaicinoid biosynthesis genes (Pun1, pAMT, CaKR1, and CaMYB31). However, the lack of pungency in sweet peppers cannot
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Anthocyanin Composition of the Purple Sweet Potato Cultivar ‘Churakanasa’ Hort. J. (IF 1.2) Pub Date : 2023-12-28 Rie Kurata, Yoshihiro Okada, Takeo Sakaigaichi, Yumi Kai, Akira Kobayashi, Keisuke Suematsu
We investigated the anthocyanin composition of the purple sweet potato cultivar ‘Churakanasa’. The color tone of the paste was compared by L*, a*, and b* values and ‘Churakanasa’ exhibited a lower b* value, which indicates a bluish tint, than ‘Churakoibeni’, a popular cultivar for paste processing in Okinawa. High performance liquid chromatography (HPLC) analysis of the pigment extract showed that
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Varietal Differences in Underground Shoot Branching Characteristics and their Relation to Harvest Characteristics in Asparagus Crowns Hort. J. (IF 1.2) Pub Date : 2023-12-20 Minori Hikawa-Endo, Takao Ikeuchi, Shuji Kozai, Tomoya Nakamura, Masanori Yamaji, Ryosuke Yamanaka, Hisashi Yoshikoshi, Hiroki Kawashima
In general, either high or low branching may contribute to the yield potential of a cultivated crop. In this study, we evaluated the varietal differences in branching characteristics in asparagus crowns and examined the relationship between branching types and harvest characteristics among six varieties tested by careful observation. ‘UC 157’ developed numerous tillers and shoot apical meristems 6
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Analysis of the Relationships between Seasonal Changes in Cut Flower Yield and Quality, and Temperature and Light Intensity, in Three Rose Varieties Hort. J. (IF 1.2) Pub Date : 2023-10-31 Katsuhiko Inamoto, Tanjuro Goto, Motoaki Doi
Three rose varieties, ‘Meivildo’, ‘Meikatana’, and ‘Korcut0122’ were grown using an “arching” method for three years. The relationship between temperature and light intensity, and the yield and quality of cut flowers, were analyzed. Flowering flushes were observed 18 times in ‘Meivildo’ and ‘Meikatana’ and 16 times in ‘Korcut0122’ during the experimental period. In three varieties, significant negative
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Introduction of Floral Scent Traits into Asiatic Hybrid Lilies (Unscented) by Crossbreeding with Lilium cernuum (Scented) Hort. J. (IF 1.2) Pub Date : 2023-10-21 Yuka Inada, Naomi Oyama-Okubo, Masumi Yamagishi
Although a strong floral scent is typical of hybrid lilies, Asiatic hybrid lilies (Lilium spp.) have only a weak scent. Therefore, developing new cultivars with pleasant floral scents is an important objective in Asiatic hybrid lily breeding programs. Among the wild species contributing to Asiatic hybrid lily establishment, L. cernuum has a characteristic scent that the nose can perceive. We crossed
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Dry Matter, Adhesiveness and Their Relationship with Other Attributes as Quality Indicators for Pumpkin Consumption Hort. J. (IF 1.2) Pub Date : 2023-10-21 Raymund Julius G. Rosales, Songsin Photchanachai, Chanulak Khanobdee
This study investigated the role of dry matter (DM) and adhesiveness (or stickiness) and their relationship with the physicochemical and antioxidant properties of raw and steamed pumpkins. Through path analysis, raw pumpkin with a high DM value yielded a positive correlation with total flavonoid contents (TFC) and Ferric Reducing Antioxidant Power (FRAP) value in its raw form, and contained high total
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Incidence of Intumescence Injury in Several Tomato Cultivars Under Different Calcium Conditions Hort. J. (IF 1.2) Pub Date : 2023-10-21 Natassia Clara Sita, Asuka Kousaka, Risa Tamoi, Chiaki Ozawa, Iriawati, Yoshikazu Kiriiwa, Katsumi Suzuki
Intumescence injury is a physiological disorder characterized by abnormal outgrowth of epidermal and parenchymal cells on the adaxial and/or abaxial surfaces of leaves. The purpose of this study was to examine cultivar differences in the incidence of intumescence injury, the relation between different calcium (Ca) conditions and intumescence injury, and to investigate countermeasures against intumescence
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Light-yellow Coloration of Sweet Pea (Lathyrus odoratus L.) Flowers is Caused by Carotenoid and Regulated by a Single Recessive Gene Hort. J. (IF 1.2) Pub Date : 2023-10-21 Yoshimi Yagishita, Masayoshi Nakayama
There are light-yellow flower cultivars of sweet pea (Lathyrus odoratus L.), but no deep-yellow ones. Observation of sweet pea flowers under ultraviolet and blue light suggested that carotenoids are responsible for the light-yellow coloration. We carried out both spectroscopic and high-performance liquid chromatography (HPLC) analyses of floral extracts of a light-yellow cultivar, ‘Artemis’, and revealed
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Identification of Quantitative Trait Loci of Fruit Quality and Color in Pineapples Hort. J. (IF 1.2) Pub Date : 2023-10-21 Kenji Nashima, Makoto Takeuchi, Chie Moromizato, Yuta Omine, Moriyuki Shoda, Naoya Urasaki, Kazuhiko Tarora, Ayaka Irei, Kenta Shirasawa, Masahiko Yamada, Miyuki Kunihisa, Chikako Nishitani, Toshiya Yamamoto
The pineapple (Ananas comosus (L.) Merr.) is an economically important tropical fruit crop. In this study, we performed quantitative trait locus (QTL) analysis using 168 individuals of the F1 population of ‘Yugafu’ × ‘Yonekura’ for 15 traits: leaf color (L*, a*, b*), harvest day, crown number, slip number, stem shoot number, sucker number, fruit weight, fruit height, fruit diameter, fruit shell color
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Anatomical Study of Salak (Salacca wallichiana C. Mart.): Post-pollination High Temperature Accelerates Pollen-tube Elongation but Inhibits Subsequent Fertilization Hort. J. (IF 1.2) Pub Date : 2023-10-21 Hiroshi Matsuda, Hirokazu Higuchi, Naoki Miyaji, Masanori Okabe
The salak fruit (snake fruit) contains one to three seeds covered with an aril. The size of the fruit primarily depends on the number of seeds. Fruits with more seeds grow larger and attain higher commercial value in fresh markets owing to their superior appearance. In eastern Thailand, during the hot period in the early rainy season, the fruit set of salak decreases, which is empirically believed
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Effects of Postharvest Treatment with 1-Naphthaleneacetic Acid on Chlorophyll and Carotenoid Metabolism in Citrus Fruit Hort. J. (IF 1.2) Pub Date : 2023-10-21 Gang Ma, Lancui Zhang, Kan Murakami, Masaki Yahata, Masaya Kato
‘Miyagawa-wase’ (Citrus unshiu Marcow.), an early-season citrus variety, is rich in multiple nutrients and widely consumed in Japan. In ‘Miyagawa-wase’, when the pulp reaches maturity and is ready to eat, the peel is still a greenish color because of the relatively high temperature in the harvest season. In this study, to improve the coloration of ‘Miyagawa-wase’ peel, we treated the fruit with 1-naphthaleneacetic
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Influence of the Hypobaric Method in Physicochemical Fruit Quality Traits of Yellow and Purple Passion Fruit Stored in Cold Temperature Hort. J. (IF 1.2) Pub Date : 2023-10-21 William Viera, Takashi Shinohara, Atsushi Sanada, Naoki Terada, Kaihei Koshio
Passion fruit (Passiflora edulis) is a tropical fruit that can be consumed fresh or processed. It is a typical respiratory climacteric fruit which is highly perishable because of the loss of water that causes dehydration and thus shrinkage, affecting the fruit appearance; in addition, some quality traits such as fruit weight, firmness and vitamin C content can also be influenced. Therefore, this fruit
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Leaf Photosynthetic Reduction at High Temperatures in Various Genotypes of Passion Fruit (Passiflora spp.) Hort. J. (IF 1.2) Pub Date : 2023-10-21 Hiroshi Matsuda, Hiroo Takaragawa
Passion fruit (Passiflora spp.) vines, mostly indigenous to tropical highlands, although some species can be cultivated in tropical lowlands, are susceptible to high temperatures. To increase the resilience of passion fruit to the warming climate, there is an urgent need to evaluate existing genetic resources for traits suited to high temperatures and to efficiently select the superior genotypes. We
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Modeling the Relationship between Apple Quality Indices and Air Temperature Hort. J. (IF 1.2) Pub Date : 2023-10-21 Toshihiko Sugiura, Noriaki Fukuda, Taiga Tsuchida, Mio Sakurai, Hiroyoshi Sugiura
The future impacts of climate change on the yields of staple crops have been widely investigated. However, owing to insufficient data compared to that available for staple crops and the complexity of the quality determination process, the relationship between quality changes in horticultural crops and climate change has not been quantified, and potential future changes in fruit quality are not well
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Pollen Tube Growth in Incompatible Pistils and Style-grafted Pistils of ‘Satonishiki’ Sweet Cherry Hort. J. (IF 1.2) Pub Date : 2023-10-21 Daiki Matsumoto, Ryohei Yamazaki, Misato Kasai, Satoshi Taira, Ryutaro Tao
Prunus fruit trees of the Rosaceae family exhibit S-RNase-based gametophytic self-incompatibility (GSI), which enables pistils to reject self-pollen by suppressing pollen tube elongation. In other plant species with S-RNase-based GSI, it has been shown that this suppression consists of two steps: first, slowing down of pollen tube elongation in the middle part of the style and second, complete arrest
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Inhibitory Effect of Ethephon on Occurrence of Water-soaked Disorder in the Japanese Pear ‘Akizuki’ Hort. J. (IF 1.2) Pub Date : 2023-10-21 Katsuya Ohkawa, Natsumi Ogata, Akane Shibasaki, Takahisa Tanaka, Ryo Itabashi, Chie Kouno, Takanori Saito, Hitoshi Ohara, Satoru Kondo
To elucidate the inhibitory effect of ethephon on the occurrence of water-soaked disorder in Japanese pear ‘Akizuki’ (Pyrus pyrifolia Nakai) fruit, we sprayed fruits with 100 mg·L−1 ethephon solution approximately 120 DAFB in the 2012, 2014, 2015, 2016, and 2017 seasons. Ethephon treatment reduced the incidence and degree of water-soaked disorder at commercial harvest time. There was no significant
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Response of Sweet Potato to Substrates and Acclimatization Conditions in the Greenhouse to Produce High-quality Planting Material Hort. J. (IF 1.2) Pub Date : 2023-10-21 Jazmín Pérez-Pazos, Amparo Rosero, Enrique Vergara, Rocío Gámez
The sweet potato is a highly important crop in terms of food security worldwide, its nutraceutical properties have increased demand, generating new market opportunities. The availability of disease-free planting material ensures success in establishing this crop, achieving higher yield and better quality. This study aimed to improve the production system of high-quality planting material in greenhouse
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A Simple Screening of Flower Sensitivity to Ethylene in Several Ornamental Asteraceae Species Hort. J. (IF 1.2) Pub Date : 2023-10-21 Yang Yang, Sho Ohno, Yoshiyuki Tanaka, Motoaki Doi
Generally, Asteraceae flowers such as chrysanthemums and gerberas, are low ethylene-sensitive and do not exhibit petal wilting and abscission. However, previous research found that the flowers of dahlia, an Asteraceae member belonging to the tribe Coreopsideae, are ethylene-sensitive and show abscission layer development in petal-ovary boundaries. In this study, we investigated the ethylene sensitivity
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Efficient Transient Expression for Functional Analysis in Fruit Using the Tsukuba System Vector Hort. J. (IF 1.2) Pub Date : 2023-07-25 Masafumi Omori, Yosuke Fujiwara, Hisayo Yamane, Kenji Miura, Ryutaro Tao
Evaluating the function of genes expressed in fruit tissues of fruit tree species using a genetic transformation approach is a long process because the trees are generally recalcitrant to genetic transformation and cannot bear fruit during their long juvenile phases. Transient gene expression in fruit enables the functional analysis of genes associated with fruit traits, which may accelerate the study
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Effect of Postharvest Temperature Management on Scent Emission from Cut Flowers of Tulip Cultivars Hort. J. (IF 1.2) Pub Date : 2023-07-25 Kyutaro Kishimoto, Yusuke Watanabe, Seiji Ikegawa
Tulip (Tulipa gesneriana L.) cultivars exhibit diverse floral scents, the emissions of which are generally influenced by temperature. To fully benefit from these scents and add value to cut tulips, it is necessary to evaluate the scent emission response to temperature. This study investigated the daily emission changes of 82 volatiles, including the main scent compounds, at different temperatures (13
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Short-term Anoxic Treatment of Litchi Fruit (Litchi chinensis Sonn. cv. Hong Huey) Delays Pericarp Browning and Maintains Physicochemical Quality During Storage Hort. J. (IF 1.2) Pub Date : 2023-07-25 Chairat Techavuthiporn, Amnat Jarerat, Hataitip Nimitkeatkai
The effect of short-term anoxic treatment prior to storage at ambient and cool temperatures on pericarp browning, fruit quality, secondary metabolites, antioxidant activity, and the browning enzyme of litchi (Litchi chinensis Sonn.) cv. Hong Huey were investigated. Litchi fruit were exposed to anoxic conditions for 6, 12, 18 and 24 h before storage at 28 ± 2°C for 5 days, or at 7 ± 2°C for 14 days
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Ascorbic Acid Extends the Shelf-life of Abiu (Pouteria caimito) Fruit by Maintaining Quality and Delaying Browning Symptoms Hort. J. (IF 1.2) Pub Date : 2023-07-25 Slamet Susanto, Abdullah Bin Arif, Siti Mariana Widayanti, Deden Derajat Matra
Abiu is a tropical fruit with many beneficial bioactive compounds. However, its economic value is limited by a short shelf life and rapid browning. This study evaluated the effect of ascorbic acid on extending abiu fruit shelf life during storage. The fruit was soaked in ascorbic acid solutions of 0 mM (control), 5 mM (AA5), and 10 mM (AA10) for 10 minutes, air-dried, then stored in an ambient room
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Relationship between Acid and Soluble Solid Content of Pineapple and Temperature Hort. J. (IF 1.2) Pub Date : 2023-07-25 Toshihiko Sugiura, Makoto Takeuchi, Takuya Kobayashi, Yuta Omine, Itaru Yonaha, Shohei Konno, Moriyuki Shoda
Pineapples (Ananas comosus (L.) Merr.) are harvested throughout the year, with acid and soluble solid contents varying with season. However, there is a lack of knowledge about the relationship between the acid and soluble solid content and climatic factors. To investigate these relationships, we analyzed the acid and soluble solid content records of a large number of fruit harvested over 15 years from
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Effect of GA3 Treatment on Berry Development in the Large Berry Mutant of ‘Delaware’ Grapes Hort. J. (IF 1.2) Pub Date : 2023-07-25 Hikaru Ishikawa, Yasuyuki Togano, Tomoki Shibuya
The large berry mutant (LBM) of the ‘Delaware’ (V. vinifera × (V. labrusca × V. aestivalis)) is known to produce larger berries than ‘Delaware’ when subjected to traditional double gibberellic acid-3 (GA3) treatment. In this study, we first compared ‘Delaware’ and the LBM in terms of their berry and cluster quality to reevaluate previous findings on LBM. Next, we compared berry size without GA3, histological
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Shoot Regeneration via Callus derived from Shoot Apex of Apple Cultivar ‘Fuji’ Hort. J. (IF 1.2) Pub Date : 2023-07-25 Haruka Sato, Natsumi Kawato, Furong Li, Kanto Ito, Ami Shinoda, Taichi Hasunuma, Jiayi Liu, Yasuyuki Kawaharada, Chikako Nishitani, Masato Wada, Manabu Watanabe, Sadao Komori
Shoot regeneration experiments from growth-point-derived callus were conducted to improve apple genome editing techniques. The plant material studied was in vitro maintained shoots of ‘Fuji’. In the first step, a procedure for shoot formation from apple callus was established. After using the two earlier reported cases’ experimental procedures and media compositions, we investigated the effect of media
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Applying Paclobutrazol and Flower Bud Pruning Modify the Fruiting Time and Fruit Quality of ‘Amrapali’ Mango (Mangifera indica L.) Hort. J. (IF 1.2) Pub Date : 2023-07-25 Md. Habibur Rahman, Md. Hassanur Rahman, Bidhan Chandra Halder, Maruf Ahmed, Nusrat Jahan Nishi
Postharvest loss of mango often occurs due to the short harvesting period. An experiment was conducted to determine the impact of paclobutrazol (PBZ) and flower bud pruning (FBP) on regulating flowering, fruiting time and fruit quality of ‘Amrapali’ mango. Different doses of PBZ at 0.5, 1.0, 1.5, 2.0 g per meter canopy diameter and water application along with FBP or without FBP were used, as well
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Effects of Plant Height and Cutting Height on Regrowth and Yield of Garland Chrysanthemum Ratooning Hort. J. (IF 1.2) Pub Date : 2023-07-25 Akiko Matsunaga, Hidekazu Sasaki
Garland chrysanthemum is conventionally ratooned and harvested by selective hand picking. This manually intensive mode of harvesting may be improved by adopting mechanized harvesting practices. In view of incorporating machine harvesting into garland chrysanthemum crops, this study evaluated the effects of plant and cutting height on ratoon crop regrowth. Garland chrysanthemums were horizontally harvested
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Gibberellin-induced Stem Elongation and Apical Bud Growth Acceleration Without Decreased Yield in Broccoli (Brassica oleracea L. var. Italica) Hort. J. (IF 1.2) Pub Date : 2023-07-25 Kaori M. Nakajima, Manato Ohishi, Fumio Sato, Megumu Takahashi
In Japan, broccoli (Brassica oleracea L. var. Italica) is primarily harvested manually. Some Japanese broccoli cultivars have short stems, but these broccoli heads are more difficult to harvest, and complicate the introduction of mechanical harvesters. Therefore, research is focused on strategies to control stem length. The present study examined the effects of the plant hormone gibberellin (GA) on
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Effect of Cultivation Temperature on Yield and Anthocyanin Content of Purple Sweet Potato (Ipomoea batatas L.) Hort. J. (IF 1.2) Pub Date : 2023-07-25 Rie Kurata, Toru Kobayashi
Purple sweet potatoes are rich in the purple pigment anthocyanin. In recent years, it has been reported that the anthocyanin content of the same variety varies depending on the place of production. Therefore, to investigate the effect of soil temperature on the anthocyanin content of sweet potato tuberous roots, two types of covering materials, black and white mulch films, were used in the same field
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Development and Evaluation of a New Source of Tolerance to Fusarium Wilt Race 1.2 in Melon Hort. J. (IF 1.2) Pub Date : 2023-07-25 Tomoko Ishikawa, Ryo Okada, Maki Kuzuya, Kenji Kato, Yosuke Yoshioka
Melon Fusarium wilt, caused by Fusarium oxysporum f. sp. melonis (Fom), is one of the most prevalent fungal diseases affecting melon (Cucumis melo L.). We aimed at finding an effective resource for breeding cultivars tolerant to Fom race 1.2, which includes pathotypes that cause yellowing (race 1.2y) and wilting (race 1.2w). We screened 294 melon accessions that originated mainly in Africa and Asia
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Breeding Long Vase Life by Crossing and Selection for Five Generations in Dahlia (Dahlia variabilis) Cut Flowers, and Selection of Fourth-Generation Line 003-15 with Ultra-Long Vase Life Hort. J. (IF 1.2) Pub Date : 2023-07-25 Takashi Onozaki, Takuo Fujimoto
Genetic improvement of flower vase life is an important breeding target for ornamental plants. As the vase life of cut dahlia (Dahlia variabilis) flowers is very short, we initiated a conventional crossbreeding research program in 2014 to improve it. We evaluated the vase life of dahlia seedlings during summer (from July to early September) to develop dahlias that grow and bloom under high temperatures
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Flower Colors and Flavonoids in the Cultivars of Verbena hybrida Hort. J. (IF 1.2) Pub Date : 2023-07-25 Haruka Seto, Serina Sasaki, Yuko Mitobe, Toru Ota, Fumi Tatsuzawa
The flower colors and flavonoids of 16 cultivars of Verbena hybrida Groenl. & Rumpler (Verbenaceae) were examined to evaluate the relationship between flower color and flavonoid components. Fifteen anthocyanins {3-O-glucoside, 3,5-di-O-glucoside, 3-O-[6-O-(acetyl)-glucoside], 3-O-[6-O-(malonyl)-glucoside], and 3,5-di-O-[6-O-(acetyl)-glucoside] of delphinidins, cyanidins, and pelargonidins}, seven flavones
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Suppression of Malformed Petals in Cut Rose ‘Yves Piaget’ Flowers Caused by Pulse-Uptake Treatment of Methyl Jasmonate Hort. J. (IF 1.2) Pub Date : 2023-07-25 Rei Kaneeda, Keith Hardie, Ken Hoshino, Chie Yoshida, Takashi Handa
The most popular fragrant cut rose cultivar in Japan is ‘Yves Piaget’, but its petals often become malformed after harvest. These malformed flowers, referred to as “incurved flowers”, are characterized by petals curving toward the adaxial side which prevents normal flowering and significantly decreases the cut flower quality. It has been reported that jasmonic acid (JA) affects petal growth, and could
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Identification of Flavonoid Pigments and Coloration Mechanisms in the Bluish-purple Flowers of Platycodon grandiflorus (Jacq.) A. DC. (Campanulaceae) Hort. J. (IF 1.2) Pub Date : 2023-07-25 Natsu Tanikawa, Hiroyuki Sano, Fumi Tatsuzawa
We investigated bluish-purple Platycodon grandiflorus flowers for yet unidentified flavonoid-related compounds and their flower coloration mechanisms. We identified a new polyacylated anthocyanin, delphinidin 3-O-[6-O-(α-rhamnopyranosyl)-β-glucopyranoside]-7-O-[6-O-(4-O-(6-O-(4-O-(6-O-(4-O-(β-glucopyranosyl)-trans-caffeoyl)-β-glucopyranosyl)-trans-caffeoyl)-β-glucopyranosyl)-trans-caffeoyl)-β-glucopyranoside]
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Analysis of Floral Scent Components of Rosa foetida Herrm., a Rose with an Unpleasant Fragrance Hort. J. (IF 1.2) Pub Date : 2023-04-26 Naomi Oyama-Okubo, Yuki Mikanagi
Rosa foetida Herrm. is an important wild rose that contributed to the birth of modern yellow cultivars. It is also well known for the unpleasant odor, not prevalent in other roses, emanating from its petals. We analyzed the floral scent of R. foetida and its sport cultivars, R. foetida var. bicolor (Jacq.) Willm. and R. foetida f. persiana (Lem.) Rehd., to identify the causative compounds for their
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1-Methylcyclopropene Pretreatment in ‘La France’ Pears to Extend Postharvest Life and Maximize Fruit Quality Hort. J. (IF 1.2) Pub Date : 2023-04-26 Abdul H. Kazimi, Oscar W. Mitalo, Azimullah Azimi, Kanae Masuda, Chikara Yano, Takashi Akagi, Koichiro Ushijima, Yasutaka Kubo
A major challenge in terms of commercializing 1-methylclopropene (1-MCP) to extend the storage life and control physiological disorders in European pears is that it irreversibly inhibits fruit ripening in some cultivars, particularly flesh softening that is necessary for optimal consumption quality. In this study, we examined the effect of 1-MCP pretreatments on fruit ripening and associated transcriptomic
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Factors Affecting Shell Cracking in Polished Young Coconuts and Preventive Measures Hort. J. (IF 1.2) Pub Date : 2023-04-26 Orrawan Pleumjit, Thanachok Taticharoen, Jingtair Siriphanich
Young coconut shell cracking is a significant problem reported during trimming and polishing. By studying the shell structure, fruit development, pressure inside the shell (internal pressure) of young fruits, dissolved carbon dioxide in the coconut water and cracking incidence, as well as postharvest treatments to manipulate the pressure and carbon dioxide concentration, it was revealed that cracking
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Effects of 1-Methylcyclopropene, Gibberellic Acid, and Aloe vera Coating on Lime Storage Life and Fruit Quality Hort. J. (IF 1.2) Pub Date : 2023-04-26 Ladawan Lerslerwong, Chompoonut Buapuean, Adirek Rugkong, Kanokporn Bunya-Atichart
Limes (Citrus aurantifolia Swingle) have a short postharvest life. Therefore, effective treatments increasing storage life to lengthen the time that produce remains fresh is desirable. This study evaluated the effects of postharvest treatments of 1-methylcyclopropene (1-MCP), gibberellic acid (GA3), and Aloe vera on lime storage life and fruit quality. The optimum individual treatments of 50% Aloe
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Self and Cross-incompatibility of Citrus depressa Hayata (Shiikuwasha) and Its Relatives Hort. J. (IF 1.2) Pub Date : 2023-04-26 Masashi Yamamoto
Self-incompatibility and compatibility of Citrus depressa (Shiikuwasha) and its related species were determined by pollen tube growth within the style. Among the 30 accessions investigated, twelve C. depressa, two C. ryukyuensis (Tanibuta), and three species derived from C. depressa, C. keraji, C. oto, and C. tarogayo, were self-incompatible, while ten C. depressa, one C. tachibana (Tachibana), and
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Evaluation of Intercropped Papaya with Banana on Growth, Fruit, and Nutrient Status Hort. J. (IF 1.2) Pub Date : 2023-04-26 Chutisorn Deemak, Ladawan Lerslerwong, Supatchaya Nampila, Somyot Meetha, Supat Isarangkool Na Ayutthaya
Papaya cultivators in northeast Thailand deal with dry conditions that dramatically affect growth, yield, and fruit quality. The use of intercropping fruit crops, especially banana, should improve papaya production. This study evaluated intercropping papaya and banana in terms of papaya growth, fruit quality, and nutrient content. Experiments were conducted at the Fruit Tree Experimental Field, Faculty
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Varietal Tolerance of Pear Flower Pollen to Low-Temperatures Treatment During Pollen Development and Damage Inhibition by Coffee Extract Hort. J. (IF 1.2) Pub Date : 2023-04-26 Akane Shibasaki, Tomohito Shimada, Satoru Kondo, Hitoshi Ohara, Katsuya Ohkawa
Artificial pollination is essential in pears (Pyrus spp.) for stable fruit set and the production of high-quality fruit. Low temperatures in the early spring before bud flowering can damage pear pollen and pose a special risk to pollen production for artificial pollination. In this study, we sought to identify, in pears, the flower bud stage most susceptible to low-temperature pollen damage, observe