In vivo volatile emissions from peanut plants induced by simultaneous fungal infection and insect damage
In vivo volatile emissions from peanut plants induced by simultaneous fungal infection and insect damage
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DOI：
10.1023/a:1013523104853
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发表时间：
2002-01-01
影响因子：
2.3
通讯作者：
Tumlinson, JH
中科院分区：
文献类型：
--
作者：
Cardoza, YJ;Alborn, HT;Tumlinson, JH
感染了白霉、Sclerotium rotium rolfsii 的花生植物 Arachishypogaea 会释放出一种有机化合物混合物，这种混合物在数量和质量上都不同于被甜菜夜蛾（BAW；Spodoptera exigua）幼虫损坏的植物或未受感染、未受损的植物所释放的混合物。 BAW 的攻击诱导脂氧合酶产物（己烯醇、己烯醛和己烯基酯）、萜类化合物和吲哚的释放。植物源化合物水杨酸甲酯和真菌源化合物 3-辛酮仅在白霉感染植物的顶空样品中发现。受到 BAW 损害的受白霉菌感染的植物除了仅因白霉菌感染而释放的挥发物外，还释放出以 BAW 为食的健康植物所散发的所有挥发物。当 BAW 幼虫选择以健康或受白霉菌感染的植物的叶子为食时，它们会消耗大量受感染植物的叶子。接触市售的(Z)-3乙酸己烯酯、芳樟醇和水杨酸甲酯（白霉菌感染的植物所释放的化合物）可显着减少固体培养基中白霉菌的生长。因此，受感染植物释放的这些化合物可能构成针对这种病原体的直接防御。
Peanut plants, Arachis hypogaea, infected with white mold, Sclerotium rotium rolfsii, emit a blend of organic compounds that differs both quantitatively and qualitatively from the blend emitted from plants damaged by beet armyworm (BAW; Spodoptera exigua) larvae or from uninfected, undamaged plants. Attack by BAW induced release of lipoxygenase products (hexenols, hexenals, and hexenyl esters), terpenoids, and indole, The plant-derived compound methyl salicylate and the fungal-derived compound 3-octanone were found only in headspace samples from white mold infected plants. White mold-infected plants exposed to BAW damage released all the volatiles emitted by healthy plants fed on by BAW in addition to those emitted in response to white mold infection alone. When BAW larvae were given a choice of feeding on leaves from healthy or white mold-infected plants, they consumed larger quantities of the leaves from infected plants. Exposure to commercially available (Z)-3 hexenyl acetate, linalool, and methyl salicylate, compounds emitted by white mold-infected plants, significantly reduced the growth of the white mold in solid-media cultures. Thus, emission of these compounds by infected plants may constitute a direct defense against this pathogen.