Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
J Chem Ecol. 2010 Feb;36(2):192-9. doi: 10.1007/s10886-010-9751-0. Epub 2010 Feb 12.
Feeding by herbivores can change plants in ways that make them more resistant to subsequent herbivory. Such induced responses are better-studied in a number of model dicots than in rice and other cereals. In a series of greenhouse and field experiments, we assessed the effects of prior herbivory by the fall armyworm, Spodoptera frugiperda (J.E. Smith) and of exogenous applications of jasmonic acid (JA) on the resistance of rice plants to the rice water weevil, Lissorhoptrus oryzophilus (Kuschel), the major pest of rice in the United States. Prior feeding by S. frugiperda and treatment of plants with exogenous JA resulted in increases in the resistance of plants to the weevil. Increases in resistance were manifested as reduced numbers of eggs and first-instars associated with armyworm-injured or JA-treated plants relative to control plants. In field experiments, there was a transient but significant reduction in the number of immature L. oryzophilus on JA-treated plants relative to untreated plants. To our knowledge, this is the first example of direct induced resistance in rice demonstrated in small-plot field experiments. We discuss the potential for the use of elicitor induced resistance in rice.
食草动物的取食可以改变植物的特性，使它们更能抵御随后的取食。与水稻和其他谷物相比，在一些模式双子叶植物中，这种诱导反应得到了更好的研究。在一系列温室和田间实验中，我们评估了秋粘虫（Spodoptera frugiperda (J.E. Smith））先前取食和茉莉酸（JA）外源处理对水稻植株抵抗美国水稻主要害虫褐飞虱（Lissorhoptrus oryzophilus (Kuschel））的影响。S. frugiperda 的先前取食和用外源 JA 处理植物导致植物对象鼻虫的抵抗力增强。抗性的增加表现为与对照植物相比，与受象鼻虫伤害或 JA 处理的植物相关的卵和第一龄幼虫数量减少。在田间实验中，JA 处理的植物上未成熟的 L. oryzophilus 数量相对于未处理的植物有短暂但显著的减少。据我们所知，这是首次在小型田间实验中证明水稻中存在直接诱导抗性的例子。我们讨论了在水稻中使用诱导抗性的可能性。
