Arbuscular mycorrhizas of plants growing in the Western Ghats region, Southern India

Muthukumar, Thangavelu; Udaiyan, K.

doi:10.1007/s005720050274

Cited by 116 publications

(85 citation statements)

References 14 publications

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“…However, a positive correlation was observed between percentage of root length colonized and AM fungal species richness (r=0.4813, n=168, p<0.001). These findings contrast with some previous studies in which no demonstrable relationship between these variables was reported (Brundrett 1991;Zahka et al 1995;Brundrett et al 1996), but they are consistent with others (Muthukumar and Udaiyan 2000;Muthukumar et al 2003). Detailed studies on the relationship between root colonization and spore density and between root colonization and species richness in the rhizopheres of Meliaceae species merit further investigation.…”

Section: Discussioncontrasting

confidence: 53%

Arbuscular mycorrhizal fungi associated with the Meliaceae on Hainan island, China

et al. 2005

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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 Paristype 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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Section: Discussioncontrasting

confidence: 53%

Arbuscular mycorrhizal fungi associated with the Meliaceae on Hainan island, China

et al. 2005

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“…One hundred 1 cm root segments were cleared with 2.5% KOH by heating in a water bath at 90 • C for 90 min, followed by acidification in HCl as previously described (Muthukumar and Udaiyan, 2000), stained with trypan blue (0.05%) in lactoglycerol and mounted on microscopic slides for microscopic evaluation at X 200. Incidence of mycorrhizal colonization per sample was estimated as the percentage of root with AM fungal structures (McGonigle et al, 1990).…”

Section: Estimation Of Mycorrhizal Colonizationmentioning

confidence: 99%

“…Spores were extracted from 100 g of rhizosphere soil using a modification of the wet-sieving technique (sieves 710-38 m) (Muthukumar and Udaiyan, 2000). Spores were recovered by filtering the sieved material onto filter paper.…”

Section: Enumeration Of Am Fungal Sporesmentioning

confidence: 99%

“…Arbuscular mycorrhizal (AM) fungi are the predominant type of mycorrhizal fungi in tropical soils that associate with a wide range of plant species and are assumed to be non-host specific (Smith and Read, 1997). The distribution and role of AM fungi in tropical plant species is well documented (Alexander et al, 1992;Janos, 1980Janos, , 1996Muthukumar and Udaiyan, 2000;Zangaro et al, 2000). Despite the importance of roots and AM fungi in nutrient cycling, resource capture and global biogeochemistry (Jackson et al, 1997), surprisingly little is known about the patterns of rooting or distribution of AM associations in tropical forests.…”

Section: Introductionmentioning

confidence: 99%

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Distribution of roots and arbuscular mycorrhizal associations in tropical forest types of Xishuangbanna, southwest China

Muthukumar

Sha

Yang

et al. 2003

Applied Soil Ecology

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Root distribution and mycorrhizal associations were compared in primary, secondary and limestone forests in Xishuangbanna, southwest China. Soil cores to a depth of 20 cm were collected at random points from four 50 m 2 quadrats in each forest type. Arbuscular mycorrhizal (AM) associations were the only form of mycorrhiza found in all forest types. The primary forest was characterized by high root mass, root lengths and AM colonization levels higher than other forest types. In contrast, secondary forests had greater AM fungal spore numbers and specific root length, indicating that plant species in secondary forests achieved a greater degree of soil exploration with less biomass allocation to roots. Root density, AM colonization and AM fungal spore numbers decreased with soil depth in all forest types. Although the correlation between AM colonization levels and spore numbers was insignificant when all forest types were considered together, significant relationships emerged when each forest type was considered individually. AM colonization and spore numbers were correlated with several root variables.

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“…Arbuscular mycorrhizal fungi (AMF) are ubiquitously associated with the large majority of plant families in different ecosystems across the world ranging from the tropics (Janos 1980;Zhao et al 2001b) or arctic-alpine habitats (Haselwandter and Read 1980;Haselwandter 1987) to mesic (Rickerl et al 1994;Ingham and Wilson 1999;Muthukumar and Udaiyan 2000) and arid habitats (Barrow et al 1997;Stutz et al 2000;O'Connor et al 2002). China embraces a large diversity of climatic conditions and soil types, resulting in a wide range of ecosystems and vegetation structure.…”

Section: Introductionmentioning

confidence: 99%

Twenty years of research on community composition and species distribution of arbuscular mycorrhizal fungi in China: a review

et al. 2006

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The biodiversity and distribution of arbuscular mycorrhizal fungi (AMF) in different ecosystems and plant communities in China has received increasing interest over the past decades. This has led to a steady increase in the number of scientific papers published on this topic. Studies have surveyed AMF-colonizing rhizospheres of most families of angiosperms, bryophytes, pteridophytes, and gymnosperms. China has about 30,000 plant species (one eighth of the plant species worldwide). A total of 104 AMF species within nine genera, including 12 new species, have been reported in environments such as croplands, grasslands, forests, and numerous disturbed environments. In this paper, we review data published over the past 20 years on AMF community composition and species distribution, the mycorrhizal status of plants, AMF spore communities in different habitats, and germplasm collections in China. Possible future trends in the study of the biodiversity of AMF are also briefly discussed. In particular, the aim of our review is to make some of the recent work published in the Chinese literature accessible to a wider international audience.

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Arbuscular mycorrhizas of plants growing in the Western Ghats region, Southern India

Cited by 116 publications

References 14 publications

Arbuscular mycorrhizal fungi associated with the Meliaceae on Hainan island, China

Arbuscular mycorrhizal fungi associated with the Meliaceae on Hainan island, China

Distribution of roots and arbuscular mycorrhizal associations in tropical forest types of Xishuangbanna, southwest China

Twenty years of research on community composition and species distribution of arbuscular mycorrhizal fungi in China: a review

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