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作 者 ：牛振川  唐明  黄继(如生)  王森  盛敏

期 刊 ：西北植物学报 2007年 6期

关键词：丛枝菌根真菌；铅；锌；土壤因子；AMF丰度；

Keywords:arbuscular mycorrhizal fungi, lead, zinc, soil factors, AMF species richness,

摘 要 ：从秦岭凤县铅锌污染区4种植物根际共鉴定出球囊霉属(Glomus)丛枝菌根真菌(Arbuscular mycorrhizal ungi,AMF)12种,其中缩球囊霉(G.constrictum)是该区域的优势种;缩球囊霉、副冠球囊霉(G.coronatum)、苏格兰球囊霉(G.caledonium)和聚丛球囊霉(G.aggregatum)对铅锌污染具有较强的耐性,而地球囊霉(G.geospo-rum)、台湾球囊霉(G.formosanum)、地表球囊霉(G.versiforme)和两型球囊霉(G.dimorphicum)对铅锌污染的耐性较弱.相关分析表明,土壤Pb、Zn、速效P浓度和pH较低时,对AMF丰度有一定的促进作用,当Pb、Zn、速效P浓度和pH较高时,对AMF丰度为抑制作用,AMF丰度与高浓度Pb呈极显著负相关,与高浓度速效P呈显著负相关.通径分析表明,Pb是影响秦岭重金属污染区AMF丰度的主要因素,其直接和间接作用都较大,而pH、速效P和Zn主要通过Pb的间接作用来影响AMF丰度.

Abstract:12 species of arbuscular mycorrhizal fungi were identified from the rhizosphere of 4 plants at diggings contaminated by lead and zinc in Feng County in the Qinling Mountains.They were all Glomus.G.constrictum was the dominant species in this area.G.constr

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