| Autor: |
J. A. G. Silveira, A. R. B. Melo, M. O. Martins, S. L. Ferreira-Silva, R. M. Aragão, E. N. Silva, R. A. Viégas |
| Jazyk: |
angličtina |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Biologia Plantarum, Vol 56, Iss 3, Pp 575-580 (2012) |
| Druh dokumentu: |
article |
| ISSN: |
1573-8264 |
| DOI: |
10.1007/s10535-012-0065-7 |
| Popis: |
The aim of this study was to test the hypothesis that salinity can affect indirectly the nitrate acquisition by a negative modulation triggered by glutamine accumulation. Cowpea plants were exposed to a mild NaCl concentration (50 mM) in order to restrict growth and N-demand. After 21 d, pretreated plants and control plants were supplied with 0, 5 and 10 mM of Ca(NO3)2 for 3 d in absence of NaCl. Salt pretreated plants showed a great limitation in acquisition of NO3 -, indicated by decline in the nitrate uptake rate, NO3 - accumulation, nitrate reductase activity and protein content. The restriction of NO3 - utilization was positively associated with increased glutamine synthetase activity and glutamine accumulation, especially in roots. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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