| Journal: | Brazilian journal of plant physiology |
| Database: | PERIÓDICA |
| System number: | 000276138 |
| ISSN: | 1677-0420 |
| Authors: | Garg, Neera1 Singla, Ranju |
| Institutions: | 1Panjab University, Department of Botany, Chandigarh, Punjab. India |
| Year: | 2004 |
| Season: | Sep-Dic |
| Volumen: | 16 |
| Number: | 3 |
| Pages: | 137-146 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | Four cultivars of chickpea, two of them of Mediterranean origin (kabuli), CSG 9651, BG 267 and two Indian (desi) types, CSG 8962, DCP 92-3, differing in their salt sensitivities were identified after screening ten genotypes in saline soils. The cultivars CSG 9651 and CSG 8962 were salt tolerant while BG 267 and DCP 92-3 were salt sensitive, respectively. The seeds of different cultivars were inoculated with Mesorhizobium ciceri, strain F: 75 and the plants were grown in the greenhouse. After the establishment of symbiosis, 15-day-old seedlings were administered doses of saline at varying concentrations (0, 4, 6, 8 dSm-1 NaCl, Na2SO4, CaCl2). Plants were harvested at 40, 70 and 100 days after sowing, for analyses. The main aim was to compare the relative salt tolerance of both desi and kabuli cultivars in terms of nitrogen fixation and carbon metabolism, as well as to ascertain whether the negative effects of saline stress on nitrogen fixation were due to a limitation of photosynthate supply to the nodule or to a limitation on the nodular metabolism that sustains nitrogenase activity. Plant growth, nodulation and nitrogenase activity was more severely affected in BG 267 and DCP 92-3 under salinity treatments (6 and 8 dSm-1) compared with CSG 9651 and CSG 8962. Nodule number as well as nodule mass increased under salt stress in CSG 9651 and CSG 8962 which might be responsible for their higher nitrogen fixation. Salinity reduced leaf chlorophyll and Rubisco activities in all cultivars. However, tolerant cultivars CSG 9651 and CSG 8962 |
| Disciplines: | Biología, Química, Agrociencias |
| Keyword: | Fisiología vegetal, Fitoquímica, Leguminosas, Garbanzo, Estrés salino, Fotosíntesis, Pigmentos fotosintéticos, Fijación del carbono, Fijación del nitrógeno, Crecimiento |
| Keyword: | Biology, Chemistry, Agricultural sciences, Plant physiology, Phytochemistry, Legumes, Chickpea, Photosynthetic pigments, Chlorophyll, Saline stress, Carbon fixation, Nitrogen fixation, Growth |
| Full text: | Texto completo (Ver HTML) |
