SOME MECHANISMS INVOLVED IN GROWTH-STIMULATION OF ECTOMYCORRHIZAL FUNGI BY BACTERIA
SOME MECHANISMS INVOLVED IN GROWTH-STIMULATION OF ECTOMYCORRHIZAL FUNGI BY BACTERIA
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DOI：
10.1139/b90-280
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发表时间：
1990-10-01
期刊：
影响因子：
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通讯作者：
GARBAYE, J
中科院分区：
文献类型：
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作者：
DUPONNOIS, R;GARBAYE, J
研究了几种土壤细菌对两种外生菌根真菌(Hebeloma kerstuliniforme Bull.)生长的促进作用。Saint Amans和Paxillusinolutus Batsch.前Fr.)是被考虑的。涉及两种机制：细菌对真菌的直接营养作用和真菌培养基脱毒的间接作用。这一点得到了以下观察的支持：(I)细菌释放的一些有机酸(柠檬酸、苹果酸)刺激这两种真菌的生长，(Ii)卷曲芽孢杆菌释放对自身有毒但由细菌代谢的多酚物质。这些初步结果表明，在外生菌根真菌侵染菌根之前的腐生期，某些细菌可以起到有益的作用。
The stimulating effect of some soil bacteria on the growth of two ectomycorrhizal fungi (Hebeloma crustuliniforme Bull. Saint Amans and Paxillus involutus Batsch. ex Fr.) is considered. Two mechanisms are involved: a direct trophic effect of the bacteria on the fungi, and an indirect effect by detoxication of the fungal culture medium. This is supported by observations that (i) some organic acids (citric acid, malic acid), released by the bacteria, stimulate the growth of the two fungi, and (ii) Paxillus involutus releases polyphenolic substances that are toxic to itself but are metabolized by the bacteria. These first results suggest that some bacteria can have beneficial effects during the saprophytic phase of ectomycorrhizal fungi before mycorrhizal infection.