Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 8, Issue 3, 2006; Page No.(561-566)

PHOSPHATASE ACTIVITY OF ECTOMYCORRHIZAL ROOT AND NUTRIENT STATUS OF PINE SEEDLINGS UNDER DIFFERENT PHYSICAL FACTORS

B. N. JHA, G.D. SHARMA AND A. K. SHLTKLA

Abstract

The phosphatase activity of ectomycorrhizal roots and nutrient status of pine seedlings inoculated with mycorrhizal fungi Collybia radicata, Laccaria laccata, Pisolithus tinctorius and Rhizopogon luteolus was studied under different physical factors namely, temperature, relative humidity and light intensity. Concentration of acid phosphatase activity was always higher than alkaline phosphatase activity. Maximum acid phosphatase was recorded with the roots of seedlings grown at 25°C with high and moderate light intensities. Seedlings with 2P level sets were found to be more efficient in phosphorus absorption under high and moderate light intensities compared to low intensity. Uptake of nitrogen was also more at high and moderate light intensities. In general higher N and P content was found in the seedlings grown at 25 °C than 10 °C. Impact of relative humidity was not found showing a definite pattern on N and P concentration in the seedlings.

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