Distinct seasonal assemblages of arbuscular mycorrhizal fungi revealed by massively parallel pyrosequencing

被引：370

作者：

Dumbrell, Alex J. ^{[1
,3
]}

Ashton, Peter D. ^{[1
]}

Aziz, Naveed ^{[1
]}

Feng, Gu ^{[2
]}

Nelson, Michaela ^{[1
]}

Dytham, Calvin ^{[1
]}

Fitter, Alastair H. ^{[1
]}

Helgason, Thorunn ^{[1
]}

机构：

[1] Univ York, Dept Biol, York YO10 5DD, N Yorkshire, England

[2] China Agr Univ, Dept Ecol, Coll Resource & Environm Sci, Beijing 100193, Peoples R China

[3] Univ Essex, Dept Biol Sci, Colchester CO4 3SQ, Essex, England

来源：

NEW PHYTOLOGIST | 2011年 / 190卷 / 03期

基金：

英国自然环境研究理事会;

关键词：

454; pyrosequencing; beta diversity; Glomeromycota; microbial diversity; seasonal dynamics; soil fungi; SSU rDNA; temporal diversity; HYACINTHOIDES-NON-SCRIPTA; DIVERSITY; PLANT; RARE; COMMUNITIES; PATTERNS; SOIL; SEARCH; TEMPERATURE; BIOSPHERE;

D O I：

10.1111/j.1469-8137.2010.03636.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

P>Understanding the dynamics of rhizosphere microbial communities is essential for predicting future ecosystem function, yet most research focuses on either spatial or temporal processes, ignoring combined spatio-temporal effects. Using pyrosequencing, we examined the spatio-temporal dynamics of a functionally important community of rhizosphere microbes, the arbuscular mycorrhizal (AM) fungi. We sampled AM fungi from plant roots growing in a temperate grassland in a spatially explicit manner throughout a year. Ordination analysis of the AM fungal assemblages revealed significant temporal changes in composition and structure. Alpha and beta diversity tended to be negatively correlated with the climate variables temperature and sunshine hours. Higher alpha diversity during colder periods probably reflects more even competitive interactions among AM fungal species under limited carbon availability, a conclusion supported by analysis of beta diversity which highlights how resource limitation may change localized spatial dynamics. Results reveal distinct AM fungal assemblages in winter and summer at this grassland site. A seasonally changing supply of host-plant carbon, reflecting changes in temperature and sunshine hours, may be the driving force in regulating the temporal dynamics of AM fungal communities. Climate change effects on seasonal temperatures may therefore substantially alter future AM fungal community dynamics and ecosystem functioning.

引用

页码：794 / 804

页数：11

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