Reduction in the Fitness of Bemisia tabaci Fed on Three Previously Infested Tomato Genotypes Differing in the Jasmonic Acid Pathway
Reduction in the Fitness of Bemisia tabaci Fed on Three Previously Infested Tomato Genotypes Differing in the Jasmonic Acid Pathway
复制标题
饲喂茉莉酸途径不同的三种先前感染的番茄基因型的烟粉虱的适应性降低
DOI：
10.1603/en11264
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发表时间：
2012-12-01
影响因子：
1.7
通讯作者：
Ge, Feng
中科院分区：
文献类型：
--
作者：
Cui, Hongying;Sun, Yucheng;Ge, Feng
研究了烟粉虱生物型B对三种等基因番茄基因型（野生型[Wt]、茉莉酸[JA]防御增强基因型[35 S]和JA缺陷基因型[spr2]）的后续侵染的种群适合度的影响。我们测试的假设，粉虱喂养预处理的番茄（番茄L.）将降低适合度，并且该效果将通过JA依赖性系统性植物防御途径介导。预处理的粉虱导致可溶性糖和游离氨基酸的水平下降，水杨酸（SA），总酚，缩合单宁的所有三种基因型增加。幼虫和蛹阶段的持续时间延长粉虱喂养的预处理的植物相比，那些喂养对照植物。此外，预处理导致降低的繁殖力和内在增长率（r（m））的粉虱，随后喂养的三个番茄基因型。粉虱更有可能饲料和存款比预处理的植物对照植物的鸡蛋。我们的研究结果表明，预处理诱导叶营养物质的减少和增加诱导SA为基础的防御，降低了基板的质量，证明了增加的发育时间和减少的繁殖力的粉虱，随后喂养他们。
The effect of previous infestation (preconditioning) by the whitefly Bemisia tabaci (Gennadius) biotype B on the population fitness of subsequent infestations that fed on three isogenic tomato genotypes (wild-type [Wt], a jasmonic acid [JA] defense-enhanced genotype [35S], and a JA-deficient genotype [spr2]) was examined. We tested the hypotheses that whiteflies fed on preconditioned tomatoes (Solanum lycopersicum L.) would have reduced fitness and that the effect would be mediated via the JA-dependent systemic plant defense pathway. Preconditioning by the whitefly resulted in decreased levels of soluble sugars and free amino acids and increased salicylic acid (SA), total phenolics, and condensed tannins for all three genotypes. The durations of the larval and pupal stages were prolonged in whiteflies fed on the preconditioned plants compared with those that fed on control plants. Furthermore, preconditioning resulted in reduced fecundity and intrinsic rate of increase (r(m)) of the whiteflies that subsequently fed on the three tomato genotypes. Whiteflies were more likely to feed and deposit eggs on control plants than on preconditioned plants. Our results indicate that preconditioning induced decreases in leaf nutrients and increased induction of an SA based defense that degraded the quality of the substrate as evidenced by an increased developmental time and reduced fecundity of whiteflies that subsequently fed on them.