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首页> 外文期刊>Scientific reports. >A sex-inducing pheromone triggers cell cycle arrest and mate attraction in the diatom Seminavis robusta
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A sex-inducing pheromone triggers cell cycle arrest and mate attraction in the diatom Seminavis robusta

机译：一种性诱导的信息素触发细胞周期停滞和配偶吸引力在硅藻素苏诺维斯·罗布斯坦中

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Although sexual reproduction is believed to play a major role in the high diversification rates and species richness of diatoms, a mechanistic understanding of diatom life cycle control is virtually lacking. Diatom sexual signalling is controlled by a complex, yet largely unknown, pheromone system. Here, a sex-inducing pheromone (SIP+) of the benthic pennate diatom Seminavis robusta was identified by comparative metabolomics, subsequently purified, and physicochemically characterized. Transcriptome analysis revealed that SIP+ triggers the switch from mitosis-to-meiosis in the opposing mating type, coupled with the transcriptional induction of proline biosynthesis genes, and the release of the proline-derived attraction pheromone. The induction of cell cycle arrest by a pheromone, chemically distinct from the one used to attract the opposite mating type, highlights the existence of a sophisticated mechanism to increase chances of mate finding, while keeping the metabolic losses associated with the release of an attraction pheromone to a minimum.
机译：虽然据信性繁殖在高度多元化率和硅藻的物种丰富的物种中发挥了重要作用，但实际上缺乏对硅藻的机械理解。硅藻性能由复杂，但主要是未知的信息素系统控制。这里，通过比较代谢组织，随后纯化和物理化学表征，鉴定了诱导的苯甲酸纤维硅藻毒素robusta的性诱导的信息素（SIP + ）。转录组分析显示，SIP + / sup>触发来自相反交配型的丝透明型转移的开关，与脯氨酸生物合成基因的转录诱导相结合，以及脯氨酸衍生的吸引力信息素的释放。通过信息素的细胞周期诱导诱导与用于吸引相反配合类型的化学不同，突出了一种复杂机制的存在，以增加伴侣发现的机会，同时保持与能吸引信息素释放相关的代谢损失到最小。

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