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首页> 外文期刊>Journal of Insect Physiology >Physiological adaptation of the Asian corn borer Ostrinia furnacalis to chemical defenses of its host plant, maize
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Physiological adaptation of the Asian corn borer Ostrinia furnacalis to chemical defenses of its host plant, maize

机译：亚洲玉米boreOstrinia furnacalis对寄主植物玉米的化学防御的生理适应

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摘要

A number of gramineous plants such as maize contain cyclic hydroxamic acids (cHx) that are toxic to many herbivores. Among the Ostrinia species found in Japan, the Asian corn borer Ostrinia furnacalis is the only one that utilizes maize, a gramineous plant. We used O. furnacalis and two congeners, Ostrinia scapulalis and Ostrinia latipennis, to obtain insights into the physiological adaptation of O. furnacalis to cHx. When an artificial diet containing a low concentration (0.3mg/g diet) of cHx was fed to the larvae of O. furnacalis and O. scapulalis, larval growth and survival were significantly less affected in O. furnacalis than O. scapulalis. An artificial diet containing a high level (0.7mg/g diet) of cHx was found to severely retard the growth of both species, albeit to different degrees. In an assay in vitro, homogenate of the digestive tract of O. furnacalis larvae degraded cHx more rapidly than that of O. scapulalis or O. latipennis. The degradation was found to be enzymatic and dependent on a cofactor, UDP-glucose, suggesting that UDP-glucosyltransferase or other UDP-glucose-dependent enzymes were involved. This enzymatic adaptation probably has enabled O. furnacalis to utilize plants containing cHx.
机译：许多禾本科植物，例如玉米，都含有对许多草食动物有毒的环状异羟肟酸（cHx）。在日本发现的Ostrinia物种中，亚洲玉米bore Ostrinia furnacalis是唯一利用玉米（一种禾本科植物）的玉米bore。我们使用了O. furnacalis和两个同类物Ostrinia scapulalis和Ostrinia latipennis，以了解O. furnacalis对cHx的生理适应性。当将含有低浓度（0.3mg / g饮食）cHx的人工饲料喂入长吻。鱼和肩。菜的幼虫时，比肩cap菜对。鱼的幼虫生长和存活的影响要小得多。发现含有高水平（0.7mg / g饮食）的cHx的人工饮食会严重阻碍两种物种的生长，尽管程度不同。在体外测定中，糠O O. furnacalis幼虫消化道的匀浆降解cHx的速度比肩cap骨O. latipennis快。发现降解是酶促的并且依赖于辅因子UDP-葡萄糖，这表明涉及UDP-葡萄糖基转移酶或其他UDP-葡萄糖依赖性酶。这种酶促适应作用可能使糠furO.calis能够利用含有cHx的植物。

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