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已有研究表明,β-葡萄糖苷酶处理植株能诱导其产生与植食性昆虫为害类似的挥发物,然而其诱导产生的机理至今尚不明确.水杨酸、茉莉酸、乙烯和过氧化氢是植物诱导防御反应中发挥重要作用的信号分子.为此,本文对β-葡萄糖苷酶处理后水稻体内这4种信号分子的含量进行了测定,并与褐飞虱为害稻株进行了比较,以明确β-葡萄糖苷酶处理与褐飞虱为害是否激活了水稻类似的信号转导途径.结果表明,与相应的对照相比,机械损伤并经β-葡萄糖苷酶处理能明显提高水稻水杨酸、乙烯和过氧化氢的浓度,但却降低了茉莉酸的含量.β-葡萄糖苷酶对这些信号分子含量影响的总体趋势与褐飞虱为害的基本一致,尽管两者所诱导的信号分子的绝对含量与时间动态存在一定差异,表明β-葡萄糖苷酶处理能激活与褐飞虱为害相类似的水稻信号转导途径.这一结果可以用于解释为什么两种处理能诱导水稻产生类似的挥发物并对稻虱缨小蜂具有同等的引诱作用.
Studies have shown that β-glucosidase-treated plants can induce volatiles similar to those of herbivorous insects, however, the mechanism of its induction is still unclear. Salicylic acid, jasmonic acid, ethylene and hydrogen peroxide are Plant-induced defense response to play an important role in signaling molecules.To this end, the β-glucosidase treatment of rice in vivo these four signal molecules were measured and compared with the brown planthopper rice plants were compared to clear β - glucosidase treatment and Nilaparvata lugens (Nilaparvata lugens), whether similar to rice plants were activated by rice planthopper (Nilaparvata lugens), showed that compared with the corresponding control, mechanical damage and β-glucosidase treatment significantly increased the content of salicylic acid, But reduced the content of jasmonic acid.The general trend of the influence of β-glucosidase on the content of these signal molecules was basically the same as that of the brown planthopper, although both the absolute content and the time dynamic of the signal molecules induced by the two There is a certain difference, indicating that β-glucosidase treatment can activate rice signal transduction pathway similar to that of Nilaparvata lugens (Nilaparvata lugens) .This result can be used to explain that What kind of treatment can induce rice to produce similar volatiles and have the same luring effect on the rice louse bee?