Arbuscular mycorrhizal fungi (AMF) in revegetated coal mine overburden dumps of Margherita, Assam, India

  • Prosanta Hazarika Rain Forest Research Institute, Sotai, Jorhat, PB. 136, PIN 785001




Arbuscular mycorrhizal fungi (AMF) structures in roots of the revegetated plant species and spore number in rhizophere soils of four overburden dumps (OBDs) of different age and three adjacent undisturbed forest sites of Tikak Colliery, North East Coalfields Limited, Margherita, Assam were studied. All nineteen species planted on the OBDs investigated were found positively mycorrhizal. The study also revealed that coal mining reduces the mycorrhizal status including species diversity in younger OBDs. The nature could recover arbuscular mycorrhizal status in terms of mycorrhizal spore number  and species diversity on the OBDs though increase in age of dumping and found to be higher in plant rhizospheres of OBD spoils in comparison to natural forest soils. About seven type of AMF spore were isolated from the plant rhizophere of 10- and 15-year OBD spoils whereas eight types of AMF propagule isolated from adjacent natural forest soils. Spores of Glomus spp. were found to dominate in the sites. The study reveals that populations and species diversity of AM fungi on the site are recovering and becoming more active as soil environmental conditions ameliorate through the increasing age of the OBDs.

 Key words: Arbuscular mycorrhizal fungi (AMF), adjacent natural forest, overburden dumps (OBDs), plant species, rhizosphere soil, per cent colonization and spore number.


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How to Cite
HAZARIKA, Prosanta. Arbuscular mycorrhizal fungi (AMF) in revegetated coal mine overburden dumps of Margherita, Assam, India. LIFE SCIENCES LEAFLETS, [S.l.], v. 51, may 2014. ISSN 0976-1098. Available at: <>. Date accessed: 21 aug. 2017.