Variation and asymmetry in host-symbiont dependence in a microbial symbiosis.
Variation and asymmetry in host-symbiont dependence in a microbial symbiosis.
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DOI：
10.1186/s12862-018-1227-9
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发表时间：
2018-07-09
影响因子：
3.4
通讯作者：
Brockhurst MA
中科院分区：
文献类型：
--
作者：
Minter EJA;Lowe CD;Sørensen MES;Wood AJ;Cameron DD;Brockhurst MA
共生是进化创新的主要来源，通过允许物种利用新的生态位，支持生态系统的功能。从自由生活到强制性共生的过渡需要合作伙伴的健身利益和相互依赖的演变。虽然已知共生类群在宿主-共生体依赖的程度上差异很大，但对共生协会内的变化知之甚少。使用实验与原生生物草履虫bursaria和小球藻之间的微生物共生，我们显示主机共生体依赖配对之间的变化，包括兼性协会，相互依赖和主机依赖的共生体。兼性协会，即主机和共生体都能够自由生活的增长，表现出更高的共生增长率和更高的每主机共生体负载比那些更大程度的依赖。这些数据表明草履虫-小球藻的相互作用存在于兼性共生和专性共生之间的边界，并进一步表明宿主比藻类共生体更可能进化出依赖性。本文的在线版本（10.1186/s12862-018-1227-9）包含补充材料，可供授权用户使用。
Symbiosis is a major source of evolutionary innovation and, by allowing species to exploit new ecological niches, underpins the functioning of ecosystems. The transition from free-living to obligate symbiosis requires the alignment of the partners’ fitness interests and the evolution of mutual dependence. While symbiotic taxa are known to vary widely in the extent of host-symbiont dependence, rather less is known about variation within symbiotic associations. Using experiments with the microbial symbiosis between the protist Paramecium bursaria and the alga Chlorella, we show variation between pairings in host-symbiont dependence, encompassing facultative associations, mutual dependence and host dependence upon the symbiont. Facultative associations, that is where both the host and the symbiont were capable of free-living growth, displayed higher symbiotic growth rates and higher per host symbiont loads than those with greater degrees of dependence. These data show that the Paramecium-Chlorella interaction exists at the boundary between facultative and obligate symbiosis, and further suggest that the host is more likely to evolve dependence than the algal symbiont. The online version of this article (10.1186/s12862-018-1227-9) contains supplementary material, which is available to authorized users.
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影响因子：
2.9
作者：
Kodama, Y;Fujishima, M
通讯作者：
Fujishima, M
影响因子：
16.6
作者：
Fisher RM;Henry LM;Cornwallis CK;Kiers ET;West SA
通讯作者：
West SA
影响因子：
1.5
作者：
Hoshina, Ryo;Iwataki, Mitsunori;Imamura, Nobutaka
通讯作者：
Imamura, Nobutaka
影响因子：
7.4
作者：
Pfeffer, PE;Douds, DD;Shachar-Hill, Y
通讯作者：
Shachar-Hill, Y
DOI：
10.1111/j.1550-7408.1974.tb03702.x
发表时间：
1974-01-01
期刊：
JOURNAL OF PROTOZOOLOGY
影响因子：
--
作者：
BROWN, JA;NIELSEN, PJ
通讯作者：
NIELSEN, PJ