Plant mortality varies with arbuscular mycorrhizal fungal species identities in a self-thinning population
Plant mortality varies with arbuscular mycorrhizal fungal species identities in a self-thinning population
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DOI：
10.1098/rsbl.2010.1040
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发表时间：
2011-06
期刊：
影响因子：
3.3
通讯作者：
Qian Zhang;Jianjun Tang;Xin Chen
中科院分区：
文献类型：
--
作者：
Qian Zhang;Jianjun Tang;Xin Chen
由于丛枝菌根真菌（AMF）物种对特定寄主植物生长的刺激不同，因此AMF物种对植物种内竞争和自疏过程的影响也可能不同。我们以紫花苜蓿（Medicago sativa L.）为模式植物群体和4种AMF物种进行了微观实验，验证了这一假设。结果表明，当植物单独生长时，AMF物种Glomus diaphanum对寄主植物生长的刺激作用大于其他3种AMF物种。在自疏植株群体中，Glomus diaphanum诱导的死亡率也最高。我们还发现死亡率与生长对定植的反应呈正相关。结果表明，AMF物种可以通过不同方式影响植物生长，从而影响植物的死亡和自疏过程。
Because arbuscular mycorrhizal fungal (AMF) species differ in stimulating the growth of particular host plant species, AMF species may vary in their effects on plant intra-specific competition and the self-thinning process. We tested this hypothesis using a microcosm experiment with Medicago sativa L. as a model plant population and four AMF species. Our results showed that the AMF species Glomus diaphanum stimulated host plant growth more than the other three AMF species did when the plants were grown individually. Glomus diaphanum also induced the highest rate of mortality in the self-thinning plant populations. We also found a positive correlation between mortality and growth response to colonization. Our results demonstrate that AMF species can affect plant mortality and the self-thinning process by affecting plant growth differently.