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Galling impacts of the gall wasp Leptocybe invasa (Hymenoptera: Eulophidae) on Eucalyptus trees vary with plant genotype

文献类型： 外文期刊

作者： Xiang, Yao 1 ; Guo, Wenfeng 2 ; Shen, Si 1 ; Gao, Xu 1 ; Li, Xiaoqiong 1 ;

作者机构： 1.Guangxi Univ, Coll Forestry, Guangxi Key Lab Forest Ecol & Conservat, Nanning 530001, Peoples R China

2.Guangxi Acad Agr Sci, Guangxi Crop Genet Improvement & Biotechnol Lab, Nanning 530007, Peoples R China

3.Guangxi Youyiguan Forest Ecosyst Res Stn, Pingxiang 532600, Peoples R China

关键词： Chlorophyll content; Gall-inducing insect; Nitrogen; Nutrient sink; Phenolic compound; Phytohormone

期刊名称：INTERNATIONAL JOURNAL OF TROPICAL INSECT SCIENCE （ 影响因子：0.774； 五年影响因子：1.071 ）

ISSN： 1742-7584

年卷期：

页码：

收录情况： SCI

摘要： Impacts of galling on the distributions of plant metabolites can vary greatly with plant genotype. In this study, two Eucalyptus genotypes with different resistance levels were chosen, and the levels of several primary and secondary metabolites, as well as phytohormones in galls and ungalled portions of galled leaves infested by the gall wasp Leptocybe invasa, and gall-free (control) leaves were compared. It was found that galls of both two plant genotypes accumulated higher concentrations of carbon, total phenolics, gibberellins (GA), and abscisic acid (ABA) but had lower chlorophyll content than ungalled portions. However, galls of highly susceptible genotype contained higher nitrogen (N), cytokinins (CK), GA, and chlorophyll content but lower C/N ratio, total phenolics, tannins, and ABA than less susceptible genotype. For both two genotypes, ABA in galls and ungalled portions increased compared with adjacent control leaves. CK and GA levels increased in galls but decreased in ungalled portions of highly susceptible genotype, compared with control leaves. For less susceptible genotype, CK levels increased in both galls and ungalled portions compared with control leaves, but higher levels of tannins, total phenolics, and GA were only detected in galls. Therefore, our study found insufficient evidence that the impact of galling on the distributions of these metabolites and phytohormones extended beyond the attacked leaves, because they varied greatly with plant genotype.

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