Zhang Ying, Guo Liang-Dong, Liu Run-Jin
Systematic Mycology and Lichenology Laboratory, Institute of Microbiology, Chinese Academy of Sciences, 100080, Beijing, P.R. China.
Mycorrhiza. 2004 Feb;14(1):25-30. doi: 10.1007/s00572-003-0272-3. Epub 2003 Oct 2.
The colonization and diversity of arbuscular mycorrhizal (AM) fungi associated with common pteridophytes were investigated in Dujiangyan, southwest China. Of the 34 species of ferns from 16 families collected, 31 were colonized by AM fungi. The mean percentage root length colonized was 15%, ranging from 0 to 47%. Nineteen species formed Paris-type and 10 intermediate-type AM. In two ferns, only rare intercellular non-septate hyphae or vesicles were observed in the roots and AM type could not be determined. Of the 40 AM fungal taxa belonging to five genera isolated from rooting-zone soils, 32 belonged to Glomus, five to Acaulospora, one to Archaeospora, one to Entrophospora, and one to Gigaspora. Acaulospora and Glomus were the dominant genera and Glomus versiforme was the most common species. The average AM spore density was 213 per 100 g air-dried soil and the average species richness was 3.7 AM species per soil sample. There was no correlation between spore density and percentage root length colonized by AM fungi.
在中国西南部的都江堰，对与常见蕨类植物相关的丛枝菌根（AM）真菌的定殖和多样性进行了调查。在所采集的来自16个科的34种蕨类植物中，有31种被AM真菌定殖。根长定殖的平均百分比为15%，范围为0至47%。19种形成了巴黎型AM，10种形成了中间型AM。在两种蕨类植物中，仅在根中观察到罕见的细胞间无隔菌丝或泡囊，无法确定AM类型。从根际土壤中分离出的属于五个属的40个AM真菌分类单元中，32个属于球囊霉属，5个属于无梗囊霉属，1个属于古孢囊霉属，1个属于内养囊霉属，1个属于巨孢囊霉属。无梗囊霉属和球囊霉属是优势属，地表球囊霉是最常见的物种。AM孢子的平均密度为每100克风干土壤213个，每个土壤样品中AM物种的平均丰富度为3.7种。孢子密度与AM真菌定殖的根长百分比之间没有相关性。
