of arbuscular mycorrhizal fungi in irrigated and?
fields of southern Karnataka, India
Sunil Kumar and Rajkumar H. Garampalli*
of Studies in Botany, University of Mysore, Mysore - 570 006, India
Author email : firstname.lastname@example.org
03 August 2011
08 May 2012
26 July 2012
The two different
agro-ecosystems were selected to study the spore density, species abundance,
and diversity of arbuscular mycorrhizal fungi (AMF) in irrigated (Mandya
district) and non-irrigated (Hassan district) agricultural fields in southern
Karnataka region, India. A total of 22 AMF species were recorded during the
study. Out of which 13 sp. were of Glomus, 4 sp. of Acaulospora,
1 sp. of Cetraspora, 1 sp. of Dentiscutata and 3 sp. of Gigaspora.
The difference in species richness of AMF species in irrigated fields ranged
from 5-12 sp. as compared to non-irrigated fields (5-11 sp.) and the
difference may be attributed to the nutritional status of the soil. We also
assumed that lower AMF colonization and abundance would be affected by water
stress. Highest spore number and percent colonization of AM fungi were
recorded in irrigated sites, showing 356-748 spore density and 70-92 %
colonization. Whereas, in non-irrigated sites, 174-341 spore density and
40-72 % colonization was recorded. Different agro-climatic conditions like
irrigation, soil pH, soil organic carbon, phosphorous correlated with the
abundance and colonization of AM fungi.
mycorrhizal fungi (AMF), Spore density, Diversity
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