Observation of asexual reproduction with symbiont transmission in planktonic foraminifera

Observation of asexual reproduction with symbiont transmission in planktonic foraminifera
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浮游有孔虫无性繁殖与共生传播的观察

DOI:
10.1093/plankt/fbaa033
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发表时间:
2020
影响因子:
2.1
通讯作者:
K.
K.
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Takagi;H.;Kurasawa;A.;Kimoto;K.

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在实验室培养的不同种类的浮游有孔虫中,经常观察到配子的释放。这些观察结果被认为是这些生物完全通过有性生殖产生新一代的证据。本文首次报道了悬雍垂球孢菌(Globigerinitauvula)的无性繁殖,它是一种小型的微型有孔虫。110个后代,所有这些都是共生藻类的宿主,这些藻类肯定是直接从父母那里传下来的。这一事件也是第一次观察到的垂直传播的共生体在浮游有孔虫。虽然所观察到的无性生殖的触发因素和自然界中的频率仍然未知,但我们的观察表明,在浮游有孔虫中,至少G.悬雍垂并没有放弃其生命周期中的无性繁殖阶段。
Gamete release has been frequently observed in laboratory cultures of various species of planktonic foraminifera. Those observations have been taken as evidence that these organisms produce new generations exclusively by sexual reproduction. We report here the first observation of asexual reproduction inGlobigerinita uvula, a small, microperforate foraminifera.The asexual phase was associated with the release of ca. 110 offspring, all of which hosted symbiotic algae that must have been passed on directly from the parent. This event was also the first observation of vertical transmission of symbionts in planktonic foraminifera. Although the trigger of the observed asexual reproduction and its frequency in nature remain unknown, our observation indicates that among the planktonic foraminifera, at leastG. uvulahas not abandoned the asexual phase of its life cycle.
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发表时间: 1990
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