Jakobsen, I. (1985) The role of phosphorus in nitrogen fixation by young pea plants (Pisum sativum). Physiologia Plantarum, 64 (2). pp. 190-196.
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Abstract
The influence of P on N2 fixation and dry matter production of young pea (Pisum sativum L. cv. Bodil) plants grown in a soil-sand mixture was investigated in growth cabinet experiments. Nodule dry weight, specific C2H2 reduction and P concentration in shoots responded to P addition before any growth response could be observed. The P concentration in nodules responded only slightly to P addition. A supply of P to P-deficient plants increased both the nodule dry weight, specific C2H2 reduction and P concentration in shoots relatively faster than it increased shoot dry weight and P concentration in nodules. Combined N applied to plants when N2 fixation had commenced, increased shoot dry weight only at the highest P levels. This indicates that the smaller plant growth at the low P levels did not result from N deficiency. The reduced nodulation and N2 fixation in P-deficient plants seem to be caused by impaired shoot metabolism and not by a direct effect of P deficiency of the nodules
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Acetylene reduction;phosphorus deficiency;Rhizobium leguminosarum |
| Author Affiliation: | Agricultural Research Department, Riso National laboratory, DK-4000 Roskilde, Denmark |
| Subjects: | Plant Production |
| Divisions: | Other Crops |
| Depositing User: | Ms Ishrath Durafsha |
| Date Deposited: | 26 May 2014 10:46 |
| Last Modified: | 26 May 2014 10:46 |
| Official URL: | http://dx.doi.org/10.1111/j.1399-3054.1985.tb02334... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/13149 |
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