Searching for a Mate: Pheromone-Directed Movement of the Benthic Diatom Seminavis robusta
Searching for a Mate: Pheromone-Directed Movement of the Benthic Diatom Seminavis robusta
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DOI：
10.1007/s00248-016-0796-7
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发表时间：
2016-08-01
影响因子：
3.6
通讯作者：
Pohnert, Georg
中科院分区：
文献类型：
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作者：
Bondoc, Karen Grace V.;Lembke, Christine;Pohnert, Georg
硅藻是一种物种丰富的微藻，通常有一个独特的生活史，营养细胞尺寸减小，然后通过两种交配型(MT+和MT-)的有性繁殖恢复大小。在海洋底栖硅藻罗布斯塔(Seminavis Robusta)中，寻找配偶是由L衍生的二酮基哌嗪介导的，这是一种由吸引交配型(MT-)产生的信息素。在这里，我们研究了相反交配型(MT+)细胞在信息素梯度下的运动模式，使用视频监控和统计建模。我们报道了迁移交配型(MT+)细胞通过同步趋化和趋化运动对信息素梯度作出反应。运动行为的改变使MT+细胞能够定位信息素来源的方向，并最大限度地提高它们与信息素来源的相遇几率。
Diatoms are species-rich microalgae that often have a unique life cycle with vegetative cell size reduction followed by size restoration through sexual reproduction of two mating types (MT+ and MT-). In the marine benthic diatom Seminavis robusta, mate-finding is mediated by an l-proline-derived diketopiperazine, a pheromone produced by the attracting mating type (MT-). Here, we investigate the movement patterns of cells of the opposite mating type (MT+) exposed to a pheromone gradient, using video monitoring and statistical modeling. We report that cells of the migrating mating type (MT+) respond to pheromone gradients by simultaneous chemotaxis and chemokinesis. Changes in movement behavior enable MT+ cells to locate the direction of the pheromone source and to maximize their encounter rate towards it.