Carbon allocation and competition maintain variation in plant root mutualisms.

Carbon allocation and competition maintain variation in plant root mutualisms.
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DOI:
10.1002/ece3.4118
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发表时间:
2018-06
影响因子:
2.6
通讯作者:
Bever JD
Bever JD
中科院分区:
生物学2区
文献类型:
--
作者:
Christian N;Bever JD

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植物参与多种根共生,提供不同程度的益处。我们使用人口增长的资源比率模型来研究伴侣质量的变化是如何持续的。我们认为,植物的能力,优先分配碳的互利和竞争植物碳之间的互利共生和nonmutualist共生。我们把碳作为两个营养上可互换的,但时间上分开的资源,碳不加选择地分配给共生的建设,和碳优先分配给共生建立和评估后的互利。这种方法表明,共存的互利主义者和nonmutualists是可能的,当植物的忠诚度的互利主义者和互利主义的成本介导的资源竞争。此外,它使我们能够跟踪共生种群动态不同程度的碳分配。具体而言,共存发生在优惠分配的中间水平。我们的研究结果与以往的实证研究,以及生物市场理论的应用植物根共生。
Plants engage in multiple root symbioses that offer varying degrees of benefit. We asked how variation in partner quality persists using a resource‐ratio model of population growth. We considered the plant's ability to preferentially allocate carbon to mutualists and competition for plant carbon between mutualist and nonmutualist symbionts. We treated carbon as two nutritionally interchangeable, but temporally separated, resources—carbon allocated indiscriminately for the construction of the symbiosis, and carbon preferentially allocated to the mutualist after symbiosis establishment and assessment. This approach demonstrated that coexistence of mutualists and nonmutualists is possible when fidelity of the plant to the mutualist and the cost of mutualism mediate resource competition. Furthermore, it allowed us to trace symbiont population dynamics given varying degrees of carbon allocation. Specifically, coexistence occurs at intermediate levels of preferential allocation. Our findings are consistent with previous empirical studies as well the application of biological market theory to plantroot symbioses.
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