Invasive Plants Have Higher Resistance to Native Generalist Herbivores Than Exotic Noninvasive Congeners
Invasive Plants Have Higher Resistance to Native Generalist Herbivores Than Exotic Noninvasive Congeners
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DOI：
10.1093/ee/nvac108
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发表时间：
2022-12
影响因子：
1.7
通讯作者：
Shan Wu;Li Chen;Yue-xi Zhou;Fengjiao Xiao;Danfeng Liu;Yi Wang
中科院分区：
文献类型：
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作者：
Shan Wu;Li Chen;Yue-xi Zhou;Fengjiao Xiao;Danfeng Liu;Yi Wang
摘要外来入侵植物美洲商陆Phytolacca americana（L.）主要集中在其药用价值和富集重金属方面。然而，很少有人知道它对本地食草昆虫的影响。在这项研究中，我们探讨了美洲商陆和外来非入侵商陆的影响。通过生物测定、产卵偏好、解毒酶活性分析和植物化学测定，对斜纹夜蛾（Fabricius）（本土烟草地老虎）进行了研究。结果发现，中华绒螯蟹的产卵偏好指数（OPI）与中华绒螯蟹的产卵偏好指数（OPI）呈负相关。取食二十蕊杨的斜纹夜蛾幼虫的产卵量高于美洲杨。S.取食二十蕊杨的斜纹夜蛾的体长比取食美洲杨的短。此外，还测定了S.取食美洲大蠊的斜纹夜蛾对美洲大蠊的抗性高于取食美洲大蠊的斜纹夜蛾。取食人工饲料的斜纹夜蛾或二十蕊夜蛾。美洲商陆木质素和类黄酮含量较高，淀粉含量较低。这些发现表明，入侵植物对食草动物具有更高的抵抗力，因此比外来非入侵植物遭受的损害更小。
Abstract Research on the invasive plant Phytolacca americana (L.) mostly focuses on its medicinal value and enrichment of heavy metals. However, little is known regarding its impact on native herbivorous insects. In this study, we explored the effects of P. americana and the exotic noninvasive Phytolacca icosandra (L.) on the Spodoptera litura (Fabricius) (native tobacco cutworm) via bioassay, oviposition preference, detoxifying enzyme activity analysis, and phytochemical determination. We found that the oviposition preference index (OPI) of S. litura feeding on P. icosandra was higher than that of P. americana. The developmental duration of S. litura feeding on P. icosandra was shorter than that of P. americana. Additionally, the Acetylcholinesterase (AchE) and Glutathione-S-transferase (GST) activities of S. litura feeding on P. americana were higher than that of S. litura feeding on artificial diets or P. icosandra. The content of lignin and flavonoids in P. americana was relatively high, whereas starch content was relatively low. These findings suggest invasive plants have higher resistance to herbivores, thereby suffering less damage than exotic noninvasive plants.