Rhizobium trifolii, R. leguminosarum, andR. hedysarum, grownex planta under anoxic conditions in a chemically defined medium, evolve N2O from NO3 –, NO2 –, and (NH4)2NO3. The amount of nitrous oxide formed after 96 hours is about 0.2M×mg–1 cells d.w. Large availability of organic matter enhances the production of N2O from nitrate by free-livingR. trifolii in peat/sand mixtures. Denitrification of the above species andR. meliloti was detected also in planta. Nitrous oxide production increases almost linearly from 10–45M×mg–1 nodules d.w. when nitrogen-fixing plants are exposed to increasing concentrations of nitrate (1–12M).
Nitrous oxide production by nitrogen fixing fast-growing rhizobia.
CASELLA, SERGIO;
1984
Abstract
Rhizobium trifolii, R. leguminosarum, andR. hedysarum, grownex planta under anoxic conditions in a chemically defined medium, evolve N2O from NO3 –, NO2 –, and (NH4)2NO3. The amount of nitrous oxide formed after 96 hours is about 0.2M×mg–1 cells d.w. Large availability of organic matter enhances the production of N2O from nitrate by free-livingR. trifolii in peat/sand mixtures. Denitrification of the above species andR. meliloti was detected also in planta. Nitrous oxide production increases almost linearly from 10–45M×mg–1 nodules d.w. when nitrogen-fixing plants are exposed to increasing concentrations of nitrate (1–12M).File in questo prodotto:
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