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一株丛枝菌根真菌的形态与分子鉴定

Identification of an Arbuscular Mycorrhizal Fungi by the Methods of Morphology and Molecule

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【作者】 龙良鲲姚青羊宋贞朱红惠

【Author】 LONG Liang-kun~1,YAO Qing~2,YANG Song-zhen~1,ZHU Hong-hui~1 (1 Guangdong Institute of Microbiology,Guangdong Provincial Key Laboratory of Microbal Culture Collection and Application,Guangzhou 510070,China;2 College of Horticulture,South China Agric.Univ.,Guangzhou 510642,China)

【机构】 广东省微生物研究所广东省菌种保藏与应用重点实验室华南农业大学园艺学院广东省微生物研究所广东省菌种保藏与应用重点实验室 广东广州510070广东广州510642广东广州510070

【摘要】 从广东酸性土壤分离得到一种编号为2-1A1的丛枝菌根真菌.其孢子在土壤中单生,未见孢子果,椭圆形,黄色至褐色,孢子较大(170μm×230μm),孢壁一层,厚约11μm,M elzer s反应为黄色.其形态特征与Glomus flavispo-rum的特征描述相一致.提取其单孢子DNA,Nested PCR扩增其18S rDNA的NS31-AM1区,经序列测定,并在Gene-Bank上比对,进行系统进化树分析,结果表明,2-1A1与Glomussp.(DQ371674)的亲缘关系最近,序列同源性为98%.分子鉴定的方法只能将其鉴定到球囊霉属Glomus.

【Abstract】 Spores of an arbuscular mycorrhizal fungal which marked as 2-1A1 were isolated from the acid soil in Guangdong Province.The spores formed singly in soil,no sporocarp,ellipsoid,yellow to brown in color.Spore wall consisted by only one layer and 11 μm thick.Melzer’s reaction was yellow.Strain 2-1A1 accorded with Glomus flavisporum in morphology.DNA was extracted from a single spore 2-1A1,then the NS31-AM1 region of 18S rDNA was amplified specifically by nested PCR.PCR products was sequenced and the DNA sequence was blasted on GeneBank.Phylogenetic tree revealed that strain 2-1A1 was closely related to Glomus sp.(DQ371674),with the similarity of 98%.Strain 21A1 was belong to the genus Glomus sp.by part of 18S rDNA sequence analysis.

【关键词】 球囊霉属形态18SrDNA进化树鉴定
【Key words】 Glomusmorphology18S rDNAphylogenetic treeidentification
【基金】 国家自然科学基金(30370033,30200006);广东省自然科学基金(E05202480)
  • 【文献出处】 华南农业大学学报 ,Journal of South China Agricultural University , 编辑部邮箱 ,2006年04期
  • 【分类号】S154.3
  • 【被引频次】28
  • 【下载频次】1106
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