Sexually dimorphic morphology, feeding behavior and gene expression profiles in cotton aphid Aphis gossypii

文献类型： 外文期刊

第一作者： Wang, Li

作者： Wang, Li;Ji, Jichao;Chen, Lulu;Zhu, Xiangzhen;Li, Dongyang;Gao, Xueke;Niu, Lin;Wang, Li;Luo, Junyu;Cui, Jinjie;Ji, Jichao;Shi, Qingyu;Zhang, Kaixin;Zhu, Xiangzhen;Li, Dongyang;Gao, Xueke;Niu, Lin;Wang, Li;Luo, Junyu;Cui, Jinjie;Ji, Jichao;Zhang, Kaixin;Zhu, Xiangzhen;Li, Dongyang;Gao, Xueke;Niu, Lin;Wang, Li;Luo, Junyu;Cui, Jinjie;Chen, Lulu

作者机构：

关键词： Aphis gossypii; sexual dimorphism; antennal ultrastructure; feeding behavior; electrical penetration graph; RNA-seq

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.1； 五年影响因子：4.4 ）

ISSN： 1526-498X

年卷期： 2023 年

页码：

收录情况： SCI

摘要： BACKGROUND: Sexual dimorphismexists inmost insects; however, less is known about sexual dimorphismin aphids. In this study, we identified sexually dimorphic differences in morphology, feeding behavior and gene expression between sexual females and males of the cotton aphid through electron microscopy, electrical penetration graph techniques and RNA sequencing. RESULTS: All males were alate with a slender reddish-yellow body and abdominal yellow-black stripes, whereas all sexual females were apterous with a pudgy green body. Sensillum types on the antennae were identical between the two sexes, although males had more sensilla, possibly because the antennae are significantly longer in males compared with sexual females. In terms of feeding behavior, males spent more time probing mesophyll cells and the phloem sieve, and salivating into the phloem sieve. By contrast, sexual females spent more time ingesting xylem sap. In total, 510 and 724 genes were specifically expressed in sexual females and males, respectively, and were significantly enriched in signaling pathways related to reproduction for sexual females (e.g. ovarian steroidogenesis, oxytocin signaling pathway) and energy and flight for males (e.g. thermogenesis, insulin signaling pathway). Moreover, 8551 differentially expressed genes were identified between the two sexes, of which the 3720 upregulated genes in sexual females were mostly enriched in signaling pathways of metabolism and energy, such as thermogenesis and the citrate cycle. CONCLUSION: This study provides insight into sexual dimorphism in aphids and lays a foundation for revealing the molecular mechanism underlying differences between the two sexes in cotton aphid. (c) 2023 Society of Chemical Industry.

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