Gall initiation enhances the availability of food resources for herbivorous insects
Gall initiation enhances the availability of food resources for herbivorous insects
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DOI：
10.1111/j.1365-2435.2003.00786.x
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发表时间：
2003-12
影响因子：
5.2
通讯作者：
M. Nakamura;Y. Miyamoto;T. Ohgushi
中科院分区：
文献类型：
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作者：
M. Nakamura;Y. Miyamoto;T. Ohgushi
1昆虫植食性对其他昆虫植食性动物既可能有负效应，也可能有正效应。通过对杨柳再生反应的研究，探讨了茎瘿蚊对其他食草昆虫的影响。2当年生枝条上的瘿发生刺激侧枝的发育，随后是二次叶片冲洗。瘿生枝条的侧枝和上部叶片坚韧较差，水分和氮含量较高。3粉蚜在有虫瘿枝条上的定殖率显著高于无虫瘿枝条，因为粉蚜经常定殖于侧枝。4两种叶甲的成虫，Plagiodera versicolora和Smaragdina semiaurantiaca，在有虫瘿的枝条上比在无虫瘿的枝条上更丰富，它们优先取食在二次叶冲洗期间产生的幼叶。5瘿的发生对蚜虫和叶甲有积极的影响，这是由于S.毛茛属。这表明，植物对昆虫植食性的再生反应提供了一个重要的机制，负责对其他昆虫植食性的积极影响。
Summary 1 Insect herbivory may have not only negative but also positive plant-mediated effects on other insect herbivores. We investigated plant-mediated effects of the stem gall midge Rabdophaga rigidae on other insect herbivores through regrowth response of the willow Salix eriocarpa. 2 Gall initiation on current-year shoots stimulated the development of lateral shoots, followed by a secondary leaf flush. Lateral shoots and upper leaves on galled shoots were less tough and had a higher water and nitrogen content. 3 Colonization rates by the aphid Aphis farinosa were significantly higher on galled shoots than on ungalled shoots, because this aphid frequently colonized lateral shoots. 4 Adults of two leaf beetles, Plagiodera versicolora and Smaragdina semiaurantiaca, were more abundant on galled than on ungalled shoots; they preferentially fed on young leaves produced during the secondary leaf flush. 5 Gall initiation positively affected aphids and leaf beetles by enhancing the availability of food resources as a result of the regrowth responses of S. eriocarpa. This indicates that the regrowth responses of plants to insect herbivory provide an important mechanism responsible for positive effects on other insect herbivores.