刺槐树洞悬土可培养真菌群落组成及其多样性分析

发布时间：2018-03-23 03:01

本文选题：刺槐　切入点：土壤真菌　出处：《菌物学报》2017年05期 　论文类型：期刊论文

【摘要】：结合形态特征与分子鉴定,分析贵州贵阳花溪刺槐"树洞悬土"和其对应地下土样中可培养真菌的群落组成。结果表明,树洞悬土中共分离得到真菌7属19种315株,其中普通青霉Penicillium commune为优势种,相对多度为81.11%;地下土壤共分离到真菌6属18种156株,优势种也是普通青霉,但相对多度仅为24.93%。树洞悬土中的真菌数量明显高于地下土,并且二者在真菌种群的多样性水平上也存在一定差异,树洞悬土的Shannon-Wiener多样性指数H=0.8291,Simpson优势度指数D=0.3373,Pielou均匀度指数J=0.2815,Margalef丰富度指数R=1.3300,均低于地下土。同时在树洞悬土中分离到一些独特真菌,如小克银汉霉Cunninghamella elegans、帚状刺壳霉Chaetopyrena penicillata和雪白腐殖霉Humicola nivea。刺槐树洞悬土和对应地下土壤真菌群落的相似性较低(Cj=0.2300)。
[Abstract]:Combined with morphological characteristics and molecular identification, the community composition of culturable fungi in "tree hole suspended soil" of Robinia pseudoacacia in Huaxi, Guiyang, Guizhou Province, and its corresponding underground soil samples were analyzed. The results showed that 315 fungi belonging to 19 species belonging to 7 genera were isolated from tree hole suspension soil. Among them, Penicillium Penicillium commune was the dominant species with a relative abundance of 81.11.The fungi belonging to 6 genera, 18 species and 156 strains were isolated from underground soil, and the dominant species were Penicillium vulgaris, but the relative abundance was only 24.933.The number of fungi in the suspensions was obviously higher than that in the underground soil. And there are some differences between them in the diversity level of fungi population. The Shannon-Wiener diversity index of tree hole suspended soil, Heng 0.8291 and Simpson dominance index, DX 0.3373 and Pielou evenness index, Ju 0.2815 and Margalef richness index Ry 1.3300, are all lower than those of underground soil, and some unique fungi were isolated from tree hole suspended soil. For example, Cunninghamella eleans, Chaetopyrena penicillata and Humicola nivea. The similarity between the suspended soil of Robinia pseudoacacia tree and the corresponding fungi community in underground soil is low.
【作者单位】：贵州大学生命科学学院真菌资源研究所;
【基金】：国家自然科学基金(31460010) 科技部基础专项子项目(2013FY110400,2014FY120100) 贵州省优秀青年科技人才培养对象专项资金[黔科合人字(2013)05号]~~
【分类号】：S714

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