Fungi in the future: interannual variation and effects of atmospheric change on arbuscular mycorrhizal fungal communities.
Fungi in the future: interannual variation and effects of atmospheric change on arbuscular mycorrhizal fungal communities.
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DOI：
10.1111/nph.13224
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发表时间：
2015-03
期刊：
影响因子：
--
通讯作者：
Helgason T
中科院分区：
文献类型：
--
作者：
Cotton TEA;Fitter AH;Miller RM;Dumbrell AJ;Helgason T
了解丛枝菌根真菌（AM）的自然动态及其对全球环境变化的响应对于预测未来植物生长和生态系统功能至关重要。研究了大气二氧化碳（CO2）和臭氧（O3）浓度升高对AM真菌群落的长期动态和影响。采用分子生物学方法对生长在不同浓度CO2和O3环境下的大豆（Glycine max） AM真菌群落进行了为期5年的富集实验。结果表明，CO2浓度升高改变了AM真菌的群落组成，增加了Glomeraceae与Gigasporaceae的比例。相比之下，升高的O3对AM真菌群落没有影响。然而，检测到的最大成分差异存在于年份之间，这表明，至少在短期内，大尺度年际时间动态比大气CO2浓度对AM真菌群落的调节作用更强。我们的结论是，虽然大气变化可能显著改变AM真菌群落，但这种影响可能被自然变化和演替模式的影响所掩盖。我们认为碳有效性的变化是AM真菌群落动态的重要决定因素。
Understanding the natural dynamics of arbuscular mycorrhizal (AM) fungi and their response to global environmental change is essential for the prediction of future plant growth and ecosystem functions. We investigated the long-term temporal dynamics and effect of elevated atmospheric carbon dioxide (CO2) and ozone (O3) concentrations on AM fungal communities. Molecular methods were used to characterize the AM fungal communities of soybean (Glycine max) grown under elevated and ambient atmospheric concentrations of both CO2 and O3 within a free air concentration enrichment experiment in three growing seasons over 5 yr. Elevated CO2 altered the community composition of AM fungi, increasing the ratio of Glomeraceae to Gigasporaceae. By contrast, no effect of elevated O3 on AM fungal communities was detected. However, the greatest compositional differences detected were between years, suggesting that, at least in the short term, large-scale interannual temporal dynamics are stronger mediators than atmospheric CO2 concentrations of AM fungal communities. We conclude that, although atmospheric change may significantly alter AM fungal communities, this effect may be masked by the influences of natural changes and successional patterns through time. We suggest that changes in carbon availability are important determinants of the community dynamics of AM fungi.
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影响因子：
11
作者：
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