Author
Abstract
Casuarina equisetifolia fixes atmospheric nitrogen (N) to produce root nodules where actinomycete fixes atmospheric N for all metabolic activities of plant. Two strains of Frankia (CeFr1, CeFr2) were isolated, cultured in artificial propionic acid medium and analysed for nitrogenase activity by acetylene reduction assay to ascertain their capabilities in N fixation. Seedlings of C. equisetifolia were inoculated with Frankia strains in the nursery and their growth performances were assessed. Seedlings inoculated with Frankia strains showed improved growth, biomass and tissue N content over control seedlings. Nitrogenase activity of Frankia strains were significantly (p < 0.05) and negatively correlated with tissue N content. Inoculated seedlings were then planted on a farmland without adding fertilisers and assessed after 2 years. Seedlings inoculated with CeFr1 and CeFr2 showed significantly improved growth in height (9.5 and 8.4 m respectively) compared with control. Seedlings inoculated with Frankia strains achieved > 95% survival and had improved biomass and N fixation.
For further details log on website :
https://www.jstor.org/stable/43856527?Search=yes&resultItemClick=true&&searchUri=%2Ftopic%2Ftropical-forests%2F%3Frefreqid%3Dexcelsior%253A52d8b8c4a68e793d4e54a689dcae7465
A Karthikeyan
Journal of Tropical Forest Science
Vol. 28, No. 3 (July 2016), pp. 235-242
Published by: Forest Research Institute Malaysia
Stable URL: http://www.jstor.org/stable/43856527
Page Count: 8
Abstract
Casuarina equisetifolia fixes atmospheric nitrogen (N) to produce root nodules where actinomycete fixes atmospheric N for all metabolic activities of plant. Two strains of Frankia (CeFr1, CeFr2) were isolated, cultured in artificial propionic acid medium and analysed for nitrogenase activity by acetylene reduction assay to ascertain their capabilities in N fixation. Seedlings of C. equisetifolia were inoculated with Frankia strains in the nursery and their growth performances were assessed. Seedlings inoculated with Frankia strains showed improved growth, biomass and tissue N content over control seedlings. Nitrogenase activity of Frankia strains were significantly (p < 0.05) and negatively correlated with tissue N content. Inoculated seedlings were then planted on a farmland without adding fertilisers and assessed after 2 years. Seedlings inoculated with CeFr1 and CeFr2 showed significantly improved growth in height (9.5 and 8.4 m respectively) compared with control. Seedlings inoculated with Frankia strains achieved > 95% survival and had improved biomass and N fixation.
For further details log on website :
https://www.jstor.org/stable/43856527?Search=yes&resultItemClick=true&&searchUri=%2Ftopic%2Ftropical-forests%2F%3Frefreqid%3Dexcelsior%253A52d8b8c4a68e793d4e54a689dcae7465
No comments:
Post a Comment