Lawrie, A.C. and Wheeler, C.T. (1974) The effects of flowering and fruit formation on the supply of photosynthetic assimilates to the nodules of Pisum sativum L. in relation to the fixation of nitrogen. New Phytologist , 73 (6). pp. 1119-1127.
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Abstract
Nitrogenase activity and the accumulation of 14C-labelled photosynthates in the nodules of peas cv. Alaska grown in N-free culture reached their highest levels shortly before flowering and fruit development. During the period from flowering to fruit production, nitrogenase activity and the accumulation of 14C-photosynthates in the nodules declined by 60%, whereas photosynthesis doubled and the amount of photosynthates accumulating in the shoot apex increased from 17 to 50% during the same period. Consistent increases in nitrogenase activity over the 24 h following removal of the shoot apex were only obtained in plants at the fruiting stage but vegetative, flowering and fruiting plants all showed an increased accumulation of photosynthates in the nodules. Continuous removal of flowers as they formed over a 2-week period resulted in a large increase in the accumulation of photosynthates in the nodules as well as in nitrogenase activity. Other factors regulating nitrogenase activity in these plants are discussed.
| Item Type: | Article |
|---|---|
| Additional Information: | SNNigam Collections |
| Uncontrolled Keywords: | Pisum sativum L.,Pea,Nitrogen fixation |
| Author Affiliation: | Department of Botany, Glasgow University, Glasgow, UK. |
| Subjects: | Plant Protection Crop Improvement Plant Physiology and Biochemistry > Plant Physiology |
| Divisions: | Other Crops |
| Depositing User: | Mr Arbind Seth |
| Date Deposited: | 24 Sep 2013 09:03 |
| Last Modified: | 24 Sep 2013 09:03 |
| Official URL: | http://dx.doi.org/10.1111/j.1469-8137.1974.tb02141... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/11777 |
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