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首页> 外文期刊>FEMS Microbiology Letters >Colonisation of spruce roots by two interacting ectomycorrhizal fungi in wood ash amended substrates
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Colonisation of spruce roots by two interacting ectomycorrhizal fungi in wood ash amended substrates

机译：两种相互作用的根外生真菌在木灰改良基质中对云杉根的定殖

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摘要

Interactions between two ectomycorrhizal fungal species, Piloderma croceum Erikss. and Hjortst. and Piloderma sp. 1 (found to colonise spruce roots and wood ash granules in the field), were investigated in wood ash amended substrates. The comparative ability of these fungi to colonise roots of non-mycorrhizal spruce (Picea abies (L.) Karst.) seedlings was studied in relation to factorial combinations of wood ash and N fertilisation. Non-mycorrhizal spruce seedlings (bait seedlings) were planted together with spruce seedlings colonised by P. croceum or Piloderma sp. 1. The growth substrate was a sand-peat mixture with wood ash or no ash and supplied with two levels of N, so that four substrate combinations were obtained. Piloderma sp. 1 mycelia colonised around 60% of the fine roots of bait seedlings in ash treatments regardless of N level and around 20-26% in treatments without ash. P. croceum only colonised 8% of the root tips in the presence of ash but 56% of the root tips in the low-N treatment without ash. However, in the high-N treatment without ash the colonisation level was reduced to around 30%. Total numbers of root tips per seedling did not vary significantly between the treatments. Possible reasons for the competitive advantage of Piloderma sp. 1 in wood ash fertilised substrate are discussed. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved. [References: 38]
机译：两种外生菌根真菌物种，Piloderma croceum Erikss之间的相互作用。还有赫约斯特和Piloderma sp.。 1（在野外发现可定居云杉根和木灰颗粒），在木灰改良基质中进行了研究。研究了这些真菌相对于木灰和氮肥的因子组合对定居非菌根云杉（云杉（Picea abies（L.）Karst。）幼苗的根部的比较能力。将非菌根云杉幼苗（诱饵幼苗）与由番石榴（P. croceum）或毛杆菌属（Piloderma sp。）定殖的云杉幼苗一起种植。 1.生长基质是含木灰或无灰的砂土混合物，并提供了两种氮含量，因此获得了四种基质组合。毛霉菌在灰分处理中，无论氮含量如何，1个菌丝体都定居在诱饵幼苗细根的60％左右，而在无灰分处理中，大约在20％至26％的菌丝定殖。在有灰分的情况下，番红花仅能定植8％的根尖，而在没有灰分的低氮处理中，定植的根尖只有56％。但是，在没有灰分的高氮处理中，定殖水平降低到30％左右。在处理之间，每个幼苗的根尖总数没有显着变化。幽门螺杆菌竞争优势的可能原因。讨论了图1所示的木灰施肥基质。 （C）2003年欧洲微生物学会联合会。由Elsevier Science B.V.保留所有权利。 [参考：38]

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