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在植物体内合成的次生物质对植物本身基本代谢无直接关系,但对保护植物不受害虫侵害有重要作用.次生物质丁布(2,4-二羟基-7-甲氧基-1,4-苯并(口恶)嗪-3-酮(2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one,简称DIMBOA))在玉米幼苗叶片中含量丰富,也存在于其他禾谷类植物叶片中,大量研究表明植物中丁布含量越高,抗害虫的能力越高.丁布对昆虫的发育、生殖和消化有抑制作用:丁布能破坏某些关键代谢过程(如线粒体能量转换)及抑制肠道蛋白酶的活性.丁布对昆虫是否有拒食活性尚有争论.行为实验表明,饲料中丁布浓度加大时欧洲玉米螟的取食量反而增加,说明没有拒食活性.Corcuera认为丁布是蚜虫取食大麦的厌食剂.阎凤鸣等根据行为实验肯定了丁布对亚洲玉米螟有拒食活性.植食性昆虫的味觉化学感受器主要分布在下颚和内唇,对昆虫选择寄主植物起重要作用.鳞翅目幼虫下颚瘤状体的栓锥感器内有4个味觉感受细胞,通常每一个细胞按其最适宜刺激物来命名,如盐细胞、糖细胞、氨基酸细胞或花色素类(glucosinolates)细胞和抗食素细胞(deterrent cell)分别对盐、糖、营养性和拒食性物质敏感.电生理学方法可直接记录这些细胞对刺激物的反应,成
The secondary biomass synthesized in plants is not directly related to the basic metabolism of the plant itself, but plays an important role in protecting the plant against pests. The secondary metabolites of butyric acid (2,4-dihydroxy-7-methoxy-1, 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (abbreviation: DIMBOA)) is abundant in leaves of corn seedlings and is also present in other In cereal leaves, a large number of studies have shown that the higher the content of butyricin in plants, the higher the ability to resist pests.Deeps inhibit the development, reproduction and digestion of insects: Butch can disrupt some of the key metabolic processes (such as mitochondria Energy conversion) and inhibit the activity of intestinal protease.Ding Bu on insects whether antifeedant activity is still controversial.Experimental experiments show that when the diet butyrate concentration increased, the European corn borer instead of feeding increased, indicating no antifeedant activity. Corcuera that Ding Bo is aphid feeding barley anaerobic agent Yanfeng Ming based behavior tests affirmed that Bush on the Asian corn borer have antifeedant activity.Phytopathic insects taste chemoreceptors are mainly distributed in the jaw and lip, the insects to choose the host plant Play an important role. Lepidoptera larvae Nodular pyramidal sensory organs have four taste-sensing cells, usually each cell according to its most appropriate stimuli to name, such as salt cells, sugar cells, amino acid cells or flower pigments (glucosinolates) cells and anti-vegetarian Deterrent cells are sensitive to salts, sugars, trophic and antifeedant substances, respectively, and electrophysiological methods directly record the response of these cells to stimuli.