Ericaceous dwarf shrubs affect ectomycorrhizal fungal community of the invasive Pinus strobus and native Pinus sylvestris in a pot experiment
Ericaceous dwarf shrubs affect ectomycorrhizal fungal community of the invasive Pinus strobus and native Pinus sylvestris in a pot experiment
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DOI：
10.1007/s00572-010-0350-2
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发表时间：
2011-07-01
期刊：
影响因子：
3.9
通讯作者：
Vohnik, Martin
中科院分区：
文献类型：
--
作者：
Kohout, Petr;Sykorova, Zuzana;Vohnik, Martin
摘要本研究旨在探讨白垩系林下灌木与入侵松和本地松相关的外生菌根真菌（EcMF）的多样性和丰度之间的关系。这两种松树的幼苗在中胚层中生长，并进行三种处理，模拟不同的森林微生境：(a)单独生长，并与(b)杨梅和(c)野杨梅一起生长。白垩系植物不能作为松分枝菌的物种库，并且抑制了潜在共享物种双色黑黑菌形成外生菌根的能力。同样，Ericaceae显著减少了P. sylvestris中Thelephora terrestris外生菌根的形成。中胚层中EcMF的物种组成受到寄主物种和白垩系邻居的强烈影响。在分离生长的情况下，油松根尖主要由mikolae定殖，而sylvestris根尖则主要由Suillus和Rhizopogon spp定殖。有趣的是，当与Ericaceae一起生长时，这种差异不太明显（Suillus + Rhizopogon spp）或不存在（W. mikolae）。该菌与salebrosus s.l.具有特异性，表明在属内水平上存在寄主特异性。本研究表明，寄主种类和白垩系植物的存在等选择因素的相互作用可能会影响外生菌根真菌实现的生态位。
This study aimed to elucidate the relationship between ericaceous understorey shrubs and the diversity and abundance of ectomycorrhizal fungi (EcMF) associated with the invasive Pinus strobus and native Pinus sylvestris. Seedlings of both pines were grown in mesocosms and subjected to three treatments simulating different forest microhabitats: (a) grown in isolation and grown with (b) Vaccinium myrtillus or (c) Vaccinium vitis-idaea. Ericaceous plants did not act as a species pool of pine mycobionts and inhibited the ability of the potentially shared species Meliniomyces bicolor to form ectomycorrhizae. Similarly, Ericaceae significantly reduced the formation of Thelephora terrestris ectomycorrhizae in P. sylvestris. EcMF species composition in the mesocosms was strongly affected by both the host species and the presence of an ericaceous neighbour. When grown in isolation, P. strobus root tips were predominantly colonised by Wilcoxina mikolae, whereas those of P. sylvestris were more commonly colonised by Suillus and Rhizopogon spp. Interestingly, these differences were less evident (Suillus + Rhizopogon spp.) or absent (W. mikolae) when the pines were grown with Ericaceae. P. strobus exclusively associated with Rhizopogon salebrosus s.l., suggesting the presence of host specificity at the intrageneric level. Ericaceous plants had a positive effect on colonisation of P. strobus root tips by R. salebrosus s.l. This study demonstrates that the interaction of selective factors such as host species and presence of ericaceous plants may affect the realised niche of the ectomycorrhizal fungi.