Induction of resistance of corn plants to Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) by application of silicon and gibberellic acid
Induction of resistance of corn plants to Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) by application of silicon and gibberellic acid
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DOI：
10.1017/s0007485316001176
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发表时间：
2017-08-01
影响因子：
1.9
通讯作者：
Nascimento, A. M.
中科院分区：
文献类型：
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作者：
Alvarenga, R.;Moraes, J. C.;Nascimento, A. M.
本研究的目的是评估硅的应用和管理的植物激素赤霉酸对玉米植株的抗秋粘虫（FAW），草地贪夜蛾，和他们的营养特性的影响。研究了该虫幼虫和蛹的历期、存活率、生物量、成虫寿命、畸形率和繁殖力。在以硅和/或赤霉酸处理的植物物质为食后，此外，还测定了FAW一龄幼虫的取食选择性、取食的总叶面积和玉米植株的营养参数。幼虫期和蛹期的测定参数差异不显著。frugiperda对硅或赤霉酸的反应。在成虫阶段的昆虫，每个女性的卵的数量显着减少，在来自幼虫喂养的植物硅或赤霉酸处理的昆虫。在非偏好测试中，释放后48小时，毛毛虫更喜欢对照未处理的植物，并且从接受激素处理（赤霉素）的植物中消耗更少的物质。赤霉酸还改变了植物的营养特性，增加其高度，地上部鲜质量和干质量，和硅含量。赤霉酸可以改变玉米植株的营养特性和硅的吸收，从而减少玉米植株对硅的吸收。frugiperda幼虫和雌性昆虫产卵减少。
The aim of this study was to evaluate the effects of silicon application and administration of the phytohormone gibberellic acid on resistance of the corn plants to the fall armyworm (FAW), Spodoptera frugiperda, and their vegetative characteristics. We evaluated larval and pupal duration, survival and biomass, and adult longevity, malformation and fecundity of S. frugiperda after feeding on plant matter treated with silicon and/or gibberellic acid. The feeding preference of FAW first-instar larvae, the total leaf area consumed by the insects, and the vegetative parameters of corn plants were also evaluated. No significant differences were observed in the measured parameters of larval and pupal stages of S. frugiperda in response to silicon or gibberellic acid. In adult stage insects, the number of eggs per female was significantly reduced in insects derived from larvae fed plants treated with silicon or gibberellic acid. In a non-preference test, 48 h after release, caterpillars preferred control untreated plants and consumed less matter from plants that had received hormonal treatment (gibberellic acid). Gibberellic acid also altered the vegetative characteristics of plants, by increasing their height, shoot fresh and dry mass, and silicon content. We conclude that gibberellic acid can alter the vegetative characteristics and silicon uptake of corn plants, leading to a reduction in their consumption by S. frugiperda larvae and a decrease in female insect oviposition.