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首页> 外文期刊>Journal of Experimental Botany >Why cellular communication during plant reproduction is particularly mediated by CRP signalling
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Why cellular communication during plant reproduction is particularly mediated by CRP signalling

机译：为什么植物繁殖过程中的细胞通讯特别是由CRP信号介导

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CRPs are overrepresented in reproductive signalling and are likely involved in speciation processes of flowering plants. CRPs induce cellular responses with similarities to downstream signalling events during defence mechanisms.Secreted cysteine-rich peptides (CRPs) represent one of the main classes of signalling peptides in plants. Whereas post-translationally modified small non-CRP peptides (psNCRPs) are mostly involved in signalling events during vegetative development and interactions with the environment, CRPs are overrepresented in reproductive processes including pollen germination and growth, self-incompatibility, gamete activation and fusion as well as seed development. In this opinion paper we compare the involvement of both types of peptides in vegetative and reproductive phases of the plant lifecycle. Besides their conserved cysteine pattern defining structural features, CRPs exhibit hypervariable primary sequences and a rapid evolution rate. As a result, CRPs represent a pool of highly polymorphic signalling peptides involved in species-specific functions during reproduction and thus likely represent key players to trigger speciation in plants by supporting reproductive isolation. In contrast, precursers of psNCRPs are proteolytically processed into small functional domains with high sequence conservation and act in more general processes. We discuss parallels in downstream processes of CRP signalling in both reproduction and defence against pathogenic fungi and alien pollen tubes, with special emphasis on the role of ROS and ion channels. In conclusion we suggest that CRP signalling during reproduction in plants has evolved from ancient defence mechanisms.
机译：CRP在生殖信号中过分表达，可能参与开花植物的形成过程。 CRPs在防御机制中诱导与下游信号转导事件相似的细胞应答。富含半胱氨酸的肽（CRPs）代表植物中信号转导肽的主要类别之一。翻译后修饰的小型非CRP肽（psNCRP）主要参与营养发育和与环境相互作用期间的信号传递事件，而CRP在生殖过程中过分代表，包括花粉萌发和生长，自交不亲和，配子激活和融合作为种子发育。在这份意见书中，我们比较了两种肽在植物生命周期的营养和生殖阶段中的参与。除了其保守的半胱氨酸模式限定结构特征外，CRP还显示出高变的一级序列和快速的进化速率。结果，CRP代表了在繁殖过程中参与物种特定功能的高度多态性信号肽库，因此可能代表了通过支持生殖分离触发植物物种形成的关键角色。相比之下，psNCRPs的前体蛋白水解性加工成小的功能域，具有较高的序列保守性，并在更一般的过程中起作用。我们讨论了CRP信号传导下游过程中的相似之处，包括在繁殖和防御病原真菌和外来花粉管中的作用，并特别强调了ROS和离子通道的作用。总之，我们认为植物繁殖过程中的CRP信号已经从古老的防御机制演变而来。

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