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The role of plant physiology and cultivar of chrysanthemum in the resistance against Western flower thrips
Entomologia Experimentalis et Applicata ( IF 1.4 ) Pub Date : 2021-01-27 , DOI: 10.1111/eea.13018 Sina Alexandra Rogge 1 , Rainer Meyhöfer 1
Entomologia Experimentalis et Applicata ( IF 1.4 ) Pub Date : 2021-01-27 , DOI: 10.1111/eea.13018 Sina Alexandra Rogge 1 , Rainer Meyhöfer 1
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Western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), is an economically important pest insect in vegetable and ornamental cultivation worldwide. Little is known about host plant resistance in the vegetative and generative phases of chrysanthemum [Chrysanthemum × morifolium (Ramat.) Hemsl. (Asteraceae)] and the role of resistance factors such as flavonols, flower color, and flower shape. We screened a broad range of chrysanthemum cultivars across two seasons to quantify resistance against Western flower thrips. Resistance was based on silver damage on the leaves, and relative flavonol content was measured using a Dualex Scientific 4 hand‐held sensor. There was significant variation in silver damage between cultivars, indicating different levels of resistance. There was no correlation between the relative flavonol content in middle leaves and plant silver damage. A clearer resistance level discrimination by flavonols in resistant and susceptible cultivars would be possible in the future by comparing multiple leaf positions during the ontogenetic phases of plant development. Moreover, the influence of flower color and shape on resistance to thrips was investigated by counting the adult thrips and larvae on flowers. The results showed significant differences in flower color preference by adults, but not by larvae. Flower shape influenced thrips larvae and females, but not males. The importance of the results for resistance determination is discussed.
中文翻译：
菊花的植物生理学和品种在抗西花蓟马中的作用
西方花蓟马Frankliniella occidentalis（Pergande）（Thysanoptera：Thripidae）是一种在世界范围内蔬菜和观赏植物中具有重要经济意义的害虫。菊花在营养和生殖阶段对宿主植物的抗性知之甚少[菊花 × rif草（Ramat。）Hemsl。（菊科）和抗药性的作用，如黄酮醇，花的颜色和花的形状。我们筛选了两个季节中广泛的菊花品种，以量化对西方花蓟马的抗性。抗性是基于叶片上的银损伤，并且使用Dualex Scientific 4手持式传感器测量了相对的黄酮含量。品种之间的银损伤存在显着差异，表明抗性水平不同。中叶的相对黄酮醇含量与植物银损伤之间没有相关性。将来，通过在植物发育的个体发育阶段比较多个叶片的位置，在抗性和易感品种中用黄酮醇进行更清晰的抗性水平区分将成为可能。而且，通过计算花朵上的成年蓟马和幼虫，研究了花朵颜色和形状对蓟马抗性的影响。结果表明，成虫对花色的偏好存在显着差异，但幼虫则没有。花的形状影响蓟马的幼虫和雌性，但不影响雄性。讨论了结果对电阻确定的重要性。
更新日期：2021-02-15
中文翻译：
菊花的植物生理学和品种在抗西花蓟马中的作用
西方花蓟马Frankliniella occidentalis（Pergande）（Thysanoptera：Thripidae）是一种在世界范围内蔬菜和观赏植物中具有重要经济意义的害虫。菊花在营养和生殖阶段对宿主植物的抗性知之甚少[菊花 × rif草（Ramat。）Hemsl。（菊科）和抗药性的作用，如黄酮醇，花的颜色和花的形状。我们筛选了两个季节中广泛的菊花品种，以量化对西方花蓟马的抗性。抗性是基于叶片上的银损伤，并且使用Dualex Scientific 4手持式传感器测量了相对的黄酮含量。品种之间的银损伤存在显着差异，表明抗性水平不同。中叶的相对黄酮醇含量与植物银损伤之间没有相关性。将来，通过在植物发育的个体发育阶段比较多个叶片的位置，在抗性和易感品种中用黄酮醇进行更清晰的抗性水平区分将成为可能。而且，通过计算花朵上的成年蓟马和幼虫，研究了花朵颜色和形状对蓟马抗性的影响。结果表明，成虫对花色的偏好存在显着差异，但幼虫则没有。花的形状影响蓟马的幼虫和雌性，但不影响雄性。讨论了结果对电阻确定的重要性。
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