The composition of phyllosphere fungal assemblages of European beech (Fagus sylvatica) varies significantly along an elevation gradient
The composition of phyllosphere fungal assemblages of European beech (Fagus sylvatica) varies significantly along an elevation gradient
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DOI：
10.1111/j.1469-8137.2012.04284.x
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发表时间：
2012-10-01
期刊：
影响因子：
9.4
通讯作者：
Vacher, Corinne
中科院分区：
文献类型：
--
作者：
Cordier, Tristan;Robin, Cecile;Vacher, Corinne
气候变暖对叶际真菌的潜在影响知之甚少，尽管它们对植物群落的动态和多样性有重要影响。叶际真菌组合沿着海拔梯度的结构可以提供关于这种潜在影响的信息，因为海拔梯度对应于短地理距离上的温度梯度。因此，我们调查的真菌组合的组成的变化，居住在欧洲山毛榉（山毛榉）在四个网站超过1000米的海拔梯度在法国比利牛斯山脉的叶际，通过使用标签编码的454焦磷酸测序。我们的研究结果表明，海拔地点之间的真菌组合的组成变化显着，无论是相对丰度和presenceabsence的物种，和组合组成的变化与平均温度的变化有很好的相关性。因此，我们的研究结果表明，气候变暖可能会改变叶际真菌物种的发病率和丰度，包括潜在的病原体。例如，斑点球腔菌（Mycosphaerella punctiformis），一种叶斑病的病原体，随着海拔的升高，其数量逐渐减少，因此可能会随着气候变暖而转移到更高的海拔地区。
Little is known about the potential effect of climate warming on phyllosphere fungi, despite their important impact on the dynamics and diversity of plant communities. The structure of phyllosphere fungal assemblages along elevation gradients may provide information about this potential effect, because elevation gradients correspond to temperature gradients over short geographic distances. We thus investigated variations in the composition of fungal assemblages inhabiting the phyllosphere of European beech (Fagus sylvatica) at four sites over a gradient of 1000 m of elevation in the French Pyrenees Mountains, by using tag-encoded 454 pyrosequencing. Our results show that the composition of fungal assemblages varied significantly between elevation sites, in terms of both the relative abundance and the presenceabsence of species, and that the variations in assemblage composition were well correlated with variations in the average temperatures. Our results therefore suggest that climate warming might alter both the incidence and the abundance of phyllosphere fungal species, including potential pathogens. For example, Mycosphaerella punctiformis, a causal agent of leaf spots, showed decreasing abundance with elevation and might therefore shift to higher elevations in response to warming.