Cycad-Weevil Pollination Symbiosis Is Characterized by Rapidly Evolving and Highly Specific Plant-Insect Chemical Communication.
Cycad-Weevil Pollination Symbiosis Is Characterized by Rapidly Evolving and Highly Specific Plant-Insect Chemical Communication.
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DOI：
10.3389/fpls.2021.639368
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发表时间：
2021
影响因子：
5.6
通讯作者：
Hopkins R
中科院分区：
文献类型：
--
作者：
Salzman S;Crook D;Calonje M;Stevenson DW;Pierce NE;Hopkins R
植物和昆虫之间的共同进化被认为是产生生物多样性的原因。广泛的研究主要集中在敌对的草食关系，但互利授粉系统也可能有助于多样化。在这里，我们描述了一个例子，化学介导的互惠物种相互作用影响性状进化和血统多样化。我们发现，挥发性化合物产生的密切相关的物种泽米苏铁是更显着不同的彼此比其他的表型特征，两个远亲授粉象鼻虫物种有专门的反应，只有挥发物从其特定的主机泽米物种。植物转录组显示，大约五分之一的基因相关的挥发性物质的生产正在积极的选择下，但我们没有发现不同类别的积极选择下的基因的相对比例的差异。表型分化的重要性，再加上化学通讯，为维护这种专性互惠突出的化学信号作为苏铁和象鼻虫传粉者之间的共同进化的一个关键机制。
Coevolution between plants and insects is thought to be responsible for generating biodiversity. Extensive research has focused largely on antagonistic herbivorous relationships, but mutualistic pollination systems also likely contribute to diversification. Here we describe an example of chemically-mediated mutualistic species interactions affecting trait evolution and lineage diversification. We show that volatile compounds produced by closely related species of Zamia cycads are more strikingly different from each other than are other phenotypic characters, and that two distantly related pollinating weevil species have specialized responses only to volatiles from their specific host Zamia species. Plant transcriptomes show that approximately a fifth of genes related to volatile production are evolving under positive selection, but we find no differences in the relative proportion of genes under positive selection in different categories. The importance of phenotypic divergence coupled with chemical communication for the maintenance of this obligate mutualism highlights chemical signaling as a key mechanism of coevolution between cycads and their weevil pollinators.
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影响因子：
14.9
作者：
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通讯作者：
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影响因子：
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作者：
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作者：
Feng, Hong-Qiang;Zhao, Xin-Cheng;Guo, Yu-Yuan
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作者：
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