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Arbuscular Mycorrhizal Fungi Promote the Growth of Ceratocarpus arenarius (Chenopodiaceae) with No Enhancement of Phosphorus Nutrition

文献类型: 外文期刊

作者: Zhang, Tao 1 ; Shi, Ning 1 ; Bai, Dengsha 3 ; Chen, Yinglong 4 ; Feng, Gu 1 ;

作者机构: 1.China Agr Univ, Coll Resources & Environm Sci, Beijing 100094, Peoples R China

2.China Agr Univ, Ctr Resource Environm & Food Secur, Beijing 100094, Peoples R China

3.Xinjiang Acad Agr Sci, Inst Nucl Technol & Biotechnol, Urumqi, Xinjiang, Peoples R China

4.Univ Western Australia, Sch Earth & Environm, Perth, WA 6009, Australia

期刊名称:PLOS ONE ( 影响因子:3.24; 五年影响因子:3.788 )

ISSN: 1932-6203

年卷期: 2012 年 7 卷 9 期

页码:

收录情况: SCI

摘要: The mycorrhizal status of plants in the Chenopodiaceae is not well studied with a few controversial reports. This study examined arbuscular mycorrhizal (AM) colonization and growth response of Ceratocarpus arenarius in the field and a greenhouse inoculation trial. The colonization rate of AM fungi in C. arenarius in in-growth field cores was low (around 15%). Vesicles and intraradical hyphae were present during all growth stages, but no arbuscules were observed. Sequencing analysis of the large ribosomal rDNA subunit detected four culturable Glomus species, G. intraradices, G. mosseae, G. etunicatum and G. microaggregatum together with eight unculturable species belong to the Glomeromycota in the root system of C. arenarius collected from the field. These results establish the mycotrophic status of C. arenarius. Both in the field and in the greenhouse inoculation trial, the growth of C. arenarius was stimulated by the indigenous AM fungal community and the inoculated AM fungal isolates, respectively, but the P uptake and concentration of the mycorrhizal plants did not increase significantly over the controls in both experiments. Furthermore, the AM fungi significantly increased seed production. Our results suggest that an alternative reciprocal benefit to carbon-phosphorus trade-off between AM fungi and the chenopod plant might exist in the extremely arid environment.

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