尾叶桉混合菌根营养生理研究  被引量:16

Study on Mycorrhizal Physiology of Eucalyptus urophyllaCoinoculated with ECM and VAM Fungi

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作  者:陈应龙[1] 弓明钦[1] 王凤珍[1] 陈羽[1] 

机构地区:[1]中国林业科学研究院热带林业研究所

出  处:《林业科学研究》1998年第3期237-242,共6页Forest Research

基  金:国家自然科学基金;"中澳合作ACIAR9425项目

摘  要:桉树是具有混合菌根(ECM和VAM)的树种。关于混合菌根营养生理的研究,国内外均未见报道。本文在苗圃接种试验的基础上,研究了尾叶桉苗期混合接种ECM菌彩色豆马勃和VAM菌苏格兰球囊霉对宿主营养生理的影响。结果表明,尾叶桉苗期混合接种菌根真菌后,对苗木根系营养生理产生了较大的影响。菌根接种能显著提高苗木的根系活力,两种混合接种方式分别比未接种对照苗提高了31.90%和28.69%,并好于两种单接种的处理。两种混合接种T2和T4根系iPA和ABA含量也有显著提高,其中,iPA分别增加了130.41%和40.72%。混合接种苗木根系可溶性多糖含量分别是对照的2.75和2.11倍,但低于单接种苗;4种菌根真菌接种苗木根系氨基酸含量均较高,分别为对照苗的3~5倍,其中混合接种苗含量高于单接种。菌根营养生理的这些变化,在一定程度上反映了菌根的接种效应。It is well known that mycorrhizal associations are an integral component of natural and managed ecological system and most vascular plants to form one of the two most common associations:either ECM or VAM. However,in contrast,the genus Ecualyptus is capable of forming both ECM and VAM,even in the same root system. This paper represents the analysis results on physiology of ecto and endomycorrhizas of E. urophylla colonised by both Glomus caledonium and Pisolithus tinctorius isolates in nursery. The root activity and the concentration of total amino acids in roottissue fluid of coinoculated seedlings increased by 28.69%~31.90% and 5.20~5.22 times respectively compared to that of uninoculated ones 5 months after inoculation. Polysaccharides concentration in mycorrhizal roots varied according to different fungal treatments,and were generally 2.11~2.75 times of that of the controls. However,that in roots of seedlings which colonised by both ECM and VAM fungi was extremely lower when comparing to that inoculated with individual fungus. The changes of physiology reflect inoculating effect on plant growth.

关 键 词:尾叶桉 混合菌根 营养生理 VAM菌 ECM菌 

分 类 号:S718.81[农业科学—林学] S792.390.1

 

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