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Species-specific herbivore-herbivore interactions and plant responses to sequential attack by multiple herbivores on a perennial woody plant

文献类型： 外文期刊

作者： Yang, Sha 1 ; Guo, Wenfeng 2 ; Tang, Yun 1 ; Li, Xiaoqiong 1 ;

作者机构： 1.Guangxi Univ, Coll Forestry, Guangxi Key Lab Forest Ecol & Conservat, Nanning 530004, Guangxi, Peoples R China

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

关键词： Chinese tallow; common-garden experiment; Gadirtha fusca; generalist; herbivore identity; induced responses; Lepidoptera; Noctuidae; Nolidae; sequential herbivory; specialist; Spodoptera litura

期刊名称：ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA （ 影响因子：1.9； 五年影响因子：2.1 ）

ISSN： 0013-8703

年卷期： 2023 年

页码：

收录情况： SCI

摘要： When plants are sequentially attacked by multiple herbivores, herbivore identity and host specialization can greatly influence the patterns of herbivore-herbivore and plant-herbivore interactions. However, how prior herbivory and the resulting induced plant responses potentially affect subsequent herbivores deserves further investigation. In this study, we conducted a common-garden experiment that manipulated sequential herbivory by the specialist caterpillar Gadirtha fusca Pogue (Lepidoptera: Nolidae) and the generalist caterpillar Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae) on Chinese tallow, Triadica sebifera (L.) Small (Euphorbiaceae). We tested how prior exposure to herbivores with different levels of host specialization affected the performance of subsequently arriving con- and heterospecifics, as well as plant growth and defense responses under subsequent herbivory. We found that prior exposure to the specialist G. fusca facilitated the performance of subsequent conspecifics, resulting in a significant decrease in the growth (height and stem diameter at ground level) of tallow plants. However, prior exposure to the generalist S. litura did not affect the feeding of subsequent con- or heterospecifics or the growth of tallow plants. Sequential herbivory by specialist and generalist conspecifics resulted in lower levels of tannins and flavonoids, respectively, in leaves of tallow plants, whereas sequential herbivory by the two species did not affect the levels of tannins or flavonoids, compared to a single damage event. We conclude that herbivore species-specific plant responses appear to be more important than herbivore identity or specialization in determining herbivore-herbivore interactions and plant responses to sequential herbivore attack.

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