The arbuscular mycorrhizal fungal community response to warming and grazing differs between soil and roots on the Qinghai-Tibetan plateau.
The arbuscular mycorrhizal fungal community response to warming and grazing differs between soil and roots on the Qinghai-Tibetan plateau.
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青藏高原土壤和根系的丛枝菌根真菌群落对变暖和放牧的反应不同。
DOI：
10.1371/journal.pone.0076447
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Guo LD
中科院分区：
文献类型：
--
作者：
Yang W;Zheng Y;Gao C;He X;Ding Q;Kim Y;Rui Y;Wang S;Guo LD
丛枝菌根(AM)真菌与陆地生态系统中的大多数植物形成共生关系，并受环境变化的影响。为了揭示干扰对未来全球变暖下AM真菌群落的影响，我们研究了青藏高原高寒草甸中国高寒草甸土壤和混根中AM真菌的丰度和群落组成。升温和放牧对AM根定殖率、孢子密度和根外菌丝密度无显著影响。利用分子生物学技术从土壤和根系中鉴定出65个AM真菌可操作分类单元(OTU)。AM真菌在土壤中的OTU丰富度(54个OTU)高于根中(34个OTU)，而且一些AM真菌在土壤和根之间表现出明显的偏向于变暖或放牧。增温和放牧对土壤AM真菌OTU丰富度没有显著影响，但与纯放牧处理相比，增温放牧显著增加了根部AM真菌OTU丰富度。非度量多维尺度分析表明，AM真菌群落组成在土壤和根之间存在显著差异，根部放牧显著影响AM真菌群落组成，而土壤AM真菌群落组成显著受气候变暖和植物物种丰富度的影响。结果表明，AM真菌群落对土壤变暖和放牧的响应与根部不同。这项研究为青藏高原高寒草甸AM真菌在全球环境变化情景下的作用提供了深入的认识。
Arbuscular mycorrhizal (AM) fungi form symbiotic associations with most plant species in terrestrial ecosystems, and are affected by environmental variations. To reveal the impact of disturbance on an AM fungal community under future global warming, we examined the abundance and community composition of AM fungi in both soil and mixed roots in an alpine meadow on the Qinghai-Tibetan Plateau, China. Warming and grazing had no significant effect on AM root colonization, spore density and extraradical hyphal density. A total of 65 operational taxonomic units (OTUs) of AM fungi were identified from soil and roots using molecular techniques. AM fungal OTU richness was higher in soil (54 OTUs) than in roots (34 OTUs), and some AM fungi that differed between soil and roots, showed significantly biased occurrence to warming or grazing. Warming and grazing did not significantly affect AM fungal OTU richness in soil, but warming with grazing significantly increased AM fungal OTU richness in roots compared to the grazing-only treatment. Non-metric multidimensional scaling analysis showed that the AM fungal community composition was significantly different between soil and roots, and was significantly affected by grazing in roots, whereas in soil it was significantly affected by warming and plant species richness. The results suggest that the AM fungal community responds differently to warming and grazing in soil compared with roots. This study provides insights into the role of AM fungi under global environmental change scenarios in alpine meadows of the Qinghai-Tibetan Plateau.
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影响因子：
5.9
作者：
Bateman, Ian J.;Mace, Georgina M.;Turner, Kerry
通讯作者：
Turner, Kerry
影响因子：
9.1
作者：
He, Guangming;Chen, Xiaodong;Liu, Jianguo
通讯作者：
Liu, Jianguo
DOI：
10.1146/annurev-resource-083110-120115
发表时间：
2011-01-01
期刊：
ANNUAL REVIEW OF RESOURCE ECONOMICS, VOL 3
影响因子：
--
作者：
Barbier, Edward B.
通讯作者：
Barbier, Edward B.
影响因子：
3.1
作者：
An, L;Liu, JG;Zhang, HM
通讯作者：
Zhang, HM
影响因子：
3.4
作者：
Hanley, N;MacMillan, D;Crabtree, B
通讯作者：
Crabtree, B