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首页> 外文期刊>Journal of Economic Entomology >Differential Accumulation of Phytohormones in Wheat Seedlings Attacked by Avirulent and Virulent Hessian Fly (Diptera: Cecidomyiidae) Larvae
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Differential Accumulation of Phytohormones in Wheat Seedlings Attacked by Avirulent and Virulent Hessian Fly (Diptera: Cecidomyiidae) Larvae

机译：无毒和有毒的黑森州苍蝇（双翅目：Cecidomyiidae）幼虫攻击小麦幼苗中植物激素的差异积累。

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摘要

We analyzed the accumulation of six phytohormones and phytohormone-related compounds in a wheat, Triticum aestivium L., genotype, OMollyO, after attacks by avirulent and virulent Hessian By, Mayetiola destructor (Say) (Diptera: Cecidomyiidae), larvae, respectively, and we examined the expression of genes in the jasmonic acid (JA) pathway by Northern blot analysis. Compared with uninfested plants, attacks by avirulent larvae resulted in increased accumulation of salicylic acid (SA) by 11.3- and 8.2-fold, 12-oxo-phytodienoic acid (OPDA) by 36.4-and 18.7-fold, 18:3 fatty acid by 4.5- and 2.2-fold, and 18:1 fatty acid by 1.8- and 1.9-fold at 24 and 72 h post-initial attack (hpia), respectively, but an 20% decrease in JA accumulation at 24 hpia at the attack site. Attacks by the virulent larvae did not affect the accumulation of SA, OPDA, and 18:3 and 18:1 fatty acids but dramatically increased the concentration of auxin (AUX) from undetectable in uninfested plants to 381.7 ng/g fresh weight at 24 hpia and 71.0 ng/g fresh weight at 72 hpia in infested plants. Transcript levels of genes encoding lipoxygenase 2, allene oxide synthase, and Arabidopsis storage protein 2 were increased after avirulent larval attacks but decreased after virulent larval attacks. Our results suggest that OPDA and SA may act together in wheat resistance to the Hessian By, whereas AUX may play a role in the susceptibility of wheat plants. The increased OPDA accumulation after avirulent larval attacks was at least partially regulated through gene transcription.
机译：我们分析了小麦，小麦和小麦中六种植物激素和与植物激素相关的化合物在无毒和强毒的Hessian By，Mayetiola破坏者（Say）（Diptera：Cecidomyiidae），幼虫和我们通过Northern印迹分析检查了茉莉酸（JA）途径中基因的表达。与未受侵染的植物相比，无毒幼虫的攻击导致水杨酸（SA）的积累增加了11.3和8.2倍，12-氧代植物二烯酸（OPDA）的36.4和18.7倍，18：3脂肪酸的积累初始攻击（hpia）后24和72 h分别为4.5倍和2.2倍脂肪酸和18：1脂肪酸分别为1.8和1.9倍，但是在攻击位点24 hpia时JA积累减少20％ 。毒性幼虫的侵袭不会影响SA，ODPA以及18：3和18：1脂肪酸的积累，但会显着提高植物生长素（AUX）的浓度，从未受感染的植物中检测到的浓度在24 hpia时增至381.7 ng / g鲜重。受感染植物在72 hpia时的鲜重为71.0 ng / g。在无毒幼虫攻击后，编码脂氧合酶2，氧化烯合酶和拟南芥贮藏蛋白2的基因的转录水平升高，而在有毒幼虫攻击后降低。我们的结果表明，OPDA和SA可能在小麦对黑森州的抗性中共同发挥作用，而AUX可能在小麦植株的敏感性中起作用。无毒幼虫攻击后增加的OPDA积累至少部分通过基因转录调控。

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