Wheat cultivars form distinctive communities of root-associated arbuscular mycorrhiza in a conventional agroecosystem

文献类型： 外文期刊

第一作者： Mao, Lin

作者： Mao, Lin;Liu, Yongjun;Shi, Guoxi;Jiang, Shengjing;Cheng, Gang;An, Lizhe;Feng, Huyuan;Li, Xingmao

作者机构：

关键词： Glomeromycota;Community assembly;Cultivar;Agriculture;Host effect

期刊名称：PLANT AND SOIL （ 影响因子：4.192； 五年影响因子：4.712 ）

ISSN： 0032-079X

年卷期： 2014 年 374 卷 1-2 期

页码：

收录情况： SCI

摘要： The effect of plant species on their root-associated arbuscular mycorrhizal (AM) fungi is well studied, but how this effect operates at the cultivar level remains poorly understood. This study investigates how wheat cultivars shape their AM fungal communities. Twenty-one new wheat cultivars were traditionally cultivated in a dryland of northwestern China, and their agronomic traits, soil characteristics and the abundance and community composition of AM fungi were measured. Both spore community in soils and AM fungal phylotypes inside roots were significantly influenced by cultivar even though hyphal abundance, spore density and AM fungal diversity were similar across cultivars. Three out of 16 AM fungal phylotypes interacted with most cultivars, whilst some phylotypes preferred to colonize cultivars with similar agronomic traits. Six wheat cultivars, all which had hosted 6 AM fungal phylotypes, seemed to be generalists. Nestedness analysis and stochastic model fitting revealed that the AM fungal communities colonizing roots were codetermined by deterministic and stochastic processes. A complex pattern of cultivar-AM fungal interactions was observed in this study, and our results highlight that the host effect on the community assembly of AM fungi could be operating on the level of plant cultivar.

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