Stimulation of ectomycorrhizal infection of Pinus radiata by some microorganisms associated with the mantle of ectomycorrhizas
Stimulation of ectomycorrhizal infection of Pinus radiata by some microorganisms associated with the mantle of ectomycorrhizas
复制标题
一些与外生菌根套有关的微生物对辐射松外生菌根感染的刺激
DOI：
10.1111/j.1469-8137.1989.tb00327.x
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发表时间：
1989
期刊：
影响因子：
9.4
通讯作者：
G. D. Bowen
中科院分区：
文献类型：
--
作者：
J. Garbaye;G. D. Bowen
摘要
从黄曲霉根霉(Rhizopogon luteolus Fr.)形成的外生菌根的外套膜中分离到微生物。和辐射松根上的Nordh。生长在沙质泥土中。然后测试了这些微生物的不同分离株对菌根感染的三个阶段的影响：真菌进入土壤、沿根生长和菌根形成。实验是在无菌和非无菌条件下进行的。外生菌根的菌盖中存在大量的微生物(以革兰氏阴性菌为主)，其中大部分对黄曲霉的菌丝生长和/或菌根的形成有促进作用。这些结果表明，一些特定的微生物群落已经进化成与外生菌根真菌以互惠互利的共生状态生活在一起。讨论了这种“辅助”微生物在提高林木苗圃接种外生菌根效率方面的潜在用途。
SUMMARY
Microorganisms were isolated from inside the mantle of ectomycorrhizas formed by the fungus Rhizopogon luteolus Fr. and Nordh on the roots of Pinus radiata D. Don. growing in a sandy podzol. Different isolates of these microorganisms were then tested for their effect on three stages of mycorrhizal infection : growth of the fungus into the soil, growth along the root, and mycorrhiza formation. Experiments were performed in axenic and non-axenic conditions. A significant microbial population was present within the mantle of ectomycorrhizas (Gram negative bacteria being dominant) and a majority of these had a stimulating effect on mycelial growth of R. luteolus and/or mycorrhiza formation. These results suggest that some specific microbial communities have evolved to live in close association with ectomycorrhizal fungi in their symbiotic state, with mutual benefit. The potential use of such‘helper’microorganisms for improving the efficiency of ectomycorrhizal inoculation in forest nurseries is discussed.