Arbuscular mycorrhizal fungi associated with the Meliaceae on Hainan island, China |
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Authors: | Z Y Shi Y L Chen G Feng R J Liu P Christie X L Li |
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Institution: | (1) College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100094, China;(2) Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, Guangdong, 510520, China;(3) School of Biological Sciences and Biotechnology, Murdoch University, Perth, WA, 6150, Australia;(4) Mycorrhiza Laboratory, Laiyang Agricultural College, Laiyang, Shandong, 265200, China;(5) Agricultural and Environmental Science Department, Queen's University Belfast, Newforge Lane, Belfast, BT9 PX, UK |
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Abstract: | 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. |
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Keywords: | Tropical AM fungal diversity Arbuscular mycorrhiza Meliaceae Spore density |
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