粘虫
生物
毛虫
夜蛾
食草动物
幼虫
唾液
植物对草食的防御
夜蛾科
生物测定
昆虫
植物对草食的耐受性
植物
生态学
基因
生物化学
重组DNA
作者
Wen‐Po Chuang,Swayamjit Ray,Flor E. Acevedo,Michelle Peiffer,Gary W. Felton,Dawn S. Luthe
标识
DOI:10.1094/mpmi-07-13-0193-r
摘要
In addition to feeding damage, herbivores release cues that are recognized by plants to elicit defenses. Caterpillar oral secretions have been shown to trigger herbivore defense responses in several different plant species. In this study, the effects of two fall armyworm (Spodoptera frugiperda) oral secretions (saliva and regurgitant) on caterpillar defense responses in maize (Zea mays) were examined. Only minute amounts of regurgitant were deposited on the maize leaf during larval feeding bouts and its application to leaves failed to induce the expression of several herbivore defense genes. On the other hand, caterpillars consistently deposited saliva on leaves during feeding and the expression of several maize defense genes significantly increased in response to saliva application and larval feeding. However, feeding by ablated caterpillars with impaired salivation did not induce these defenses. Furthermore, bioassays indicated that feeding by unablated caterpillars significantly enhanced defenses when compared with that of ablated caterpillars. Another critical finding was that the maize genotype and stage of development affected the expression of defense genes in response to wounding and regurgitant treatments. These results demonstrate that fall armyworm saliva contains elicitors that trigger herbivore defenses in maize.
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