Variability in herbivore-induced defence signalling across different maize genotypes impacts significantly on natural enemy foraging behaviour

Variability in herbivore-induced defence signalling across different maize genotypes impacts significantly on natural enemy foraging behaviour
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不同玉米基因型的食草动物诱导的防御信号的变异对天敌觅食行为有显着影响

DOI:
10.1007/s10340-018-1033-6
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发表时间:
2018
影响因子:
4.8
通讯作者:
Michereff M
Michereff M
中科院分区:
农林科学1区
文献类型:
--
作者:
Michereff M

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“聪明”的植物释放挥发性防御化合物,以应对害虫的损害,并招募有益的天敌,提供了一个机会,利用生物控制在未来的作物保护战略。利用6种玉米基因型,Zapalote Chico(“地方品种”)、Mirt 2A、Sintético Spodoptera(SS)、L3和两种商业杂交种BRS 4103和BRS 1040,本工作的目的是评估玉米对巴西主要玉米害虫草地贪夜蛾幼虫损害的反应,以及卵寄生蜂Telenomus remus对S. frugiperdadamage。Y型管嗅觉仪与T. remus对S.与相同基因型的组成型挥发物相比,SS和BRS 4103的frugiperda诱导的挥发物,但与所测试的其他基因型没有。对玉米挥发性物质的化学分析表明,SS产生更多的挥发性化合物响应于S。frugiperdadamage,其次是BRS 4103。此外,高水平的单,高,或倍半萜,连同绿色叶挥发物(GLVs)是最有吸引力的混合为T。然而,当只有GLV在较高水平下产生时,没有吸引力。总之,这些结果表明,玉米植物由于S. frugiperdadamage变化显着取决于玉米基因型,这种变异性影响T。恢复觅食行为
‘Smart’ plants that release volatile defence compounds in response to pest damage, and which recruit beneficial natural enemies, offer an opportunity for exploiting biological control in future crop protection strategies. Using six maize genotypes, Zapalote Chico (‘landrace’), Mirt2A, Sintético Spodoptera (SS), L3, and two commercial hybrids BRS 4103 and BRS 1040, the aim of this work was to evaluate maize responses to larval damage from the fall armywormSpodoptera frugiperda,a major maize pest in Brazil, and the ability of the egg parasitoidTelenomus remusto respond to HIPVs induced byS. frugiperdadamage. Y-tube olfactometer bioassays withT. remusshowed preferential responses to theS. frugiperda-induced volatiles of SS and BRS 4103 compared to constitutive volatiles of the same genotypes, but to none of the other genotypes tested. Chemical analysis of maize volatile extracts showed that SS produced more volatile compounds in response toS. frugiperdadamage, followed by BRS 4103. In addition, higher levels of mono, homo-, or sesquiterpenes, together with green leaf volatiles (GLVs) were the most attractive blend forT. remus;however, there was no attraction when only GLVs were produced in higher levels. In summary, these results show that volatile defence signalling produced by maize plants due toS. frugiperdadamage varies significantly depending on maize genotype and this variability influencesT. remusforaging behaviour.
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