Shi Z Y, Chen Y L, Feng G, Liu R J, Christie P, Li X L
College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100094, China.
Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, Guangdong, 510520, China.
Mycorrhiza. 2006 Mar;16(2):81-87. doi: 10.1007/s00572-005-0017-6. Epub 2005 Aug 17.
Species richness, spore density, frequency of occurrence, and relative abundance of AM fungi were determined in rhizosphere soil samples from nine tropical rainforest sites on Hainan island, south China, and the arbuscular mycorrhizal (AM) status of members of the Meliaceae was examined. All 28 plant taxa investigated (25 species including two varieties of 1 species and three varieties of another) were colonized by AM fungi. The mean proportion of root length colonized was 56% (range 10-95%). Vesicles were observed in 27 and hyphal coils in 26 of the 28 plant taxa. Mycorrhizas were of the Paris-type or intermediate-type, with no Arum-type mycorrhizas observed. Species richness of AM fungi varied from 3 to 15 and spore density from 46 to 1,499 per 100 g rhizosphere soil. Of 33 AM fungal taxa in five genera isolated and identified, 18 belonged to Glomus, 9 to Acaulospora, 1 to Entrophospora, 2 to Gigaspora, and 3 to Scutellospora. Acaulospora and Glomus were the dominant genera identified. Glomus claroideum was the taxon most commonly isolated, with a frequency of occurrence of 56.5% and relative abundance of 10.4%. A positive correlation was found between percentage of root length colonization and species richness. However, there was no correlation between spore density and percentage of root length colonized by AM fungi.
在中国南方海南岛的9个热带雨林地点的根际土壤样本中，测定了丛枝菌根（AM）真菌的物种丰富度、孢子密度、出现频率和相对丰度，并研究了楝科植物的丛枝菌根（AM）状况。所调查的全部28个植物分类群（25个物种，包括1个物种的2个变种和另1个物种的3个变种）均被AM真菌定殖。根长度被定殖的平均比例为56%（范围为10%-95%）。在28个植物分类群中的27个中观察到了泡囊，26个中观察到了菌丝圈。菌根为巴黎型或中间型，未观察到疆南星型菌根。AM真菌的物种丰富度在3至15之间，孢子密度为每100克根际土壤46至1499个。在分离和鉴定出的5个属的33个AM真菌分类群中，18个属于球囊霉属，9个属于无梗囊霉属，1个属于内养囊霉属，2个属于巨孢囊霉属，3个属于盾巨孢囊霉属。无梗囊霉属和球囊霉属是鉴定出的优势属。透明球囊霉是最常分离出的分类群，出现频率为56.5%，相对丰度为10.4%。发现根长度定殖百分比与物种丰富度之间存在正相关。然而，孢子密度与AM真菌定殖的根长度百分比之间没有相关性。
