Performances of survival, feeding behavior, and gene expression in aphids reveal their different fitness to host alteration.
Performances of survival, feeding behavior, and gene expression in aphids reveal their different fitness to host alteration.
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蚜虫的生存表现、摄食行为和基因表达揭示了它们对寄主改变的不同适应性
DOI：
10.1038/srep19344
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发表时间：
2016-01-13
影响因子：
4.6
通讯作者：
Cui F
中科院分区：
文献类型：
--
作者：
Lu H;Yang P;Xu Y;Luo L;Zhu J;Cui N;Kang L;Cui F
以不同植物物种为食的昆虫种群面临着适应这些差异的选择压力。一项整合蚜虫在不同寄主植物上的生态、行为和基因表达的研究还没有得到很好的探索。本研究探讨了寄主适应度和生存，取食行为和唾液腺基因表达的豌豆（豌豆）寄主品种的豌豆Acyrthosiphon豌豆喂养共同的主机蚕豆和3个遗传相关的主机（毛野豌豆，蒺藜苜蓿，紫花苜蓿）之间的关系。生命表数据表明，非优势寄主上的蚜虫个体小、繁殖率低、种群增长和个体发育缓慢、寿命长。电穿透图结果表明，在驯化前，蚜虫在所有非偏好寄主植物上被动取食韧皮部汁液的时间显著减少。在M.蒺藜和V.villosa，豌豆宿主种族个体表现出改善的摄食行为。豌豆寄主小种在M. sativa.有趣的是，宿主特异性差异表达的唾液腺基因的数量与蚜虫在该宿主植物上的适合度呈负相关。本研究为蚜虫寄主植物专化性研究提供了重要线索。
Insect populations feeding on different plant species are under selection pressure to adapt to these differences. A study integrating elements of the ecology, behavior, and gene expression of aphids on different host plants has not yet been well-explored. The present study explores the relationship between host fitness and survival, feeding behavior, and salivary gland gene expression of a pea (Pisum sativum) host race of Acyrthosiphon pisum feeding on a common host Vicia faba and on three genetically-related hosts (Vicia villosa, Medicago truncatula, and Medicago sativa). Life table data indicated that aphids on non-favored hosts exhibited small size, low reproduction rate, slow population increase and individual development, and long lifespan. Electrical penetration graph results showed that the aphids spent significantly less time in passive ingestion of phloem sap on all non-preferred host plants before acclimation. After a period of acclimation on M. truncatula and V. villosa, pea host race individuals showed improved feeding behavior. No individuals of the pea host race completed its life history on M. sativa. Interestingly, the number of host-specific differentially-expressed salivary gland genes was negatively correlated with the fitness of aphids on this host plant. This study provided important cues in host plant specialization in aphids.