Current Science

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Extracellular enzymes degrade complex organic compounds into soluble substances and make them available for plants. These are important for nutrient cycling in the soil and ectomycorrhizal fungi (ECM) are an impor­tant source of these enzymes. In the present study, Dipterocarpus retusus seedlings native to Nagaland and Eastern Himalaya, India, were inoculated with Scleroderma citrinum and Russula rosea ECM. Soil enzymes like urease, dehydrogenase and nitrogen content were analysed in the rhizosphere region of the seedlings. S. citrinum-inoculated seedlings showed higher urease and dehydrogenase activity in rhizospheric soil and root surfaces and higher nitrogen content. Higher carbohydrate content was observed in S. citrinum-inoculated seedlings. Significant relation was found between ectomycorrhizal colonization and carbohydrate content. S. citrinum fungus was found to be a more effective symbiont with D. retusus seedlings during nursery practices for nutrient uptake in wasteland soil

Keywords

Bioremediation, degraded land, extracellular enzymes, ectomycorrhizal fungi.
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