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Glucosinolate variation among organs, growth stages and seasons suggests its dominant accumulation in sexual over asexual-reproductive organs in white radish
Scientia Horticulturae ( IF 4.3 ) Pub Date : 2021-09-22 , DOI: 10.1016/j.scienta.2021.110617
Byeong Wook Jeon 1 , Man-Ho Oh 2 , Hyoung Seok Kim 3 , Eun Ok Kim 3 , Won Byoung Chae 4
Affiliation  

Radish (Raphanus sativus L.), a root vegetable crop, contains a large amount of glucosinolate but information on its changes in field condition among different organs, growth stages and seasons is very limited. The glucosinolate composition, concentration (mmol∙kilogram−1) and content (μmol∙organ−1) of radish were analyzed among shoots, roots, inflorescences and siliques in vegetative and/or reproductive growth stages during autumn and spring to estimate sink/source relation and proper harvest time for high glucosinolate. Glucosinolates were measured weekly during autumn and spring using two autumn and one spring cultivars. All cultivars did not flower in autumn while only autumn cultivars had inflorescences in spring. Among three glucosinolates detected, glucoraphasatin was predominant, and glucobrassicin and gluconasturtiin varied in ratio among organs, growth stages and seasons. Root and shoot glucosinolate concentrations decreased as plants grow during autumn. Glucosinolate concentration in roots tended to decrease but that in shoots continuously increased during spring. Glucosinolate concentration was higher in roots than shoots during autumn and early spring but higher in shoots during late spring. Total glucosinolate content was also significantly higher in roots than shoots during autumn. However, it was higher in shoots at vegetative stage but in roots shortly at flower initiation, and then sharply increased in shoots at developmental stage during spring. The sharp increase in shoot glucosinolate content never happened in a spring cultivar without inflorescences. Glucosinolate concentration in the tenth week was significantly higher in inflorescences than other organs. These results suggest that when they co-exist, glucosinolate accumulates more in inflorescences than roots, which act as organs for sexual and asexual reproduction, respectively. Proper harvest time for leaves and roots were suggested based on the glucosinolate content and growth of radish plants.



中文翻译:

硫代葡萄糖苷在器官、生长阶段和季节之间的变化表明其在白萝卜的有性比无性生殖器官中占主导地位

萝卜(萝卜大号),根蔬菜作物,含有大量的芥子油苷,但其在不同的器官,生长阶段和季节间场条件变化的信息是非常有限的。芥子油苷的组成、浓度(mmol∙kg -1)和含量(μmol∙organ -1) 在秋​​季和春季营养和/或生殖生长阶段的芽、根、花序和长角果中分析萝卜的 ),以估计高芥子油苷的库/源关系和适当的收获时间。使用两种秋季和一种春季栽培品种在秋季和春季每周测量一次硫代葡萄糖苷。不是所有品种都在秋季开花,只有秋季品种在春季有花序。在检测到的三种硫代葡萄糖苷中,以硫代葡萄糖甙占主导地位,并且在不同器官、生长阶段和季节之间,葡萄糖苷和葡糖苷酸的比例不同。随着植物在秋季生长,根和芽硫代葡萄糖苷浓度降低。春季根中硫代葡萄糖苷浓度呈下降趋势,但枝条中硫代葡萄糖苷浓度在春季持续增加。秋季和早春时,根中硫代葡萄糖苷的浓度高于地上部,而晚春时地上部中的硫代葡萄糖苷浓度更高。秋季根中总硫代葡萄糖苷含量也显着高于芽。然而,在营养阶段的枝条中较高,但在开花初期不久在根中,然后在春季发育阶段的枝条中急剧增加。在没有花序的春季栽培品种中,枝条芥子油苷含量的急剧增加从未发生过。花序中第十周的硫代葡萄糖苷浓度显着高于其他器官。这些结果表明,当它们共存时,硫代葡萄糖苷在花序中的积累比在根中积累的多,根分别作为有性和无性繁殖的器官。

更新日期:2021-09-23
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