Effects of host plants on aphid feeding behavior, fitness, and Buchnera aphidicola titer

文献类型： 外文期刊

第一作者： Liu, Shen

作者： Liu, Shen;Liu, Xiao-Bei;Zhang, Tian-Tao;Bai, Shu-Xiong;He, Kang-Lai;Zhang, Yong-Jun;Wang, Zhen-Ying;Liu, Shen;Francis, Frederic

作者机构：

关键词： aphid fitness; Buchnera; endosymbiont titer; feeding behaviors; host plants; nutrient content

期刊名称：INSECT SCIENCE （ 影响因子：2.9； 五年影响因子：3.1 ）

ISSN： 1672-9609

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Aphids are sap-feeding plant pests that depend on their symbiotic relationships with the primary endosymbiont Buchnera aphidicola to adapt to impoverished diets. However, how the host plant affects the aphid primary symbiont and aphid adaptation to host plant transfer are poorly known. In this study, aphid symbiont screening and genotype identification were used to establish 2 aphid strains (Rhopalosiphum maidis [Rm] and Rhopalosiphum padi [Rp] strains) containing only Buchnera without any secondary symbionts for both wheat aphid species (R. maidis and R. padi). Aphid fitness and Buchnera titers were unstable on some of these host plants after transferring to novel host plants (G1-G5), which were influenced by host plant species and generations; however, they stabilized after prolonged feeding on the same plants for 10 generations. The electropenetrography (EPG) records showed that the allocation of aphid feeding time was significantly distinct in the 6 host plants; aphids had more intracellular punctures and spent more nonprobing time on green bristlegrass which was not conducive to its growth compared with other plants. The content of soluble sugar, soluble protein, and amino acid in the leaves of the 6 host plants were also clearly separated. The correlation coefficient analysis showed that the nutrient contents of host plants had significant correlations with aphid feeding behaviors, fitness, and Buchnera titers. In the meantime, aphid fitness, and Buchnera titers were also affected by aphid feeding behaviors. Also, Buchnera titers of aphid natural populations on 6 host plants showed a visible difference. Our study deepened our understanding of the interaction among aphids, endosymbionts, and host plants, indicating that the host plant nutrient content is a predominant factor affecting aphid adaptation to their diet, initially affecting aphid feeding behaviors, and further affecting aphid fitness and Buchnera titers, which would further contribute to exploiting new available strategies for aphid control.

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