An interdisciplinary research strategy to improve symbiotic nitrogen fixation and yield of common bean (Phaseolus vulgaris) in salinised areas of the Mediterranean basin.
J Biotechnol
; 91(2-3): 257-68, 2001 Oct 04.
Article
en En
| MEDLINE
| ID: mdl-11566396
The main findings of a cooperative research group of agronomists, plant breeders, microbiologists, physiologists and molecularists to improve the symbiotic nitrogen fixation (SNF) and N2-dependent yield of common bean under moderate salinity in the Mediterranean basin are summarised. Agronomic surveys in reference production areas show large spatial and temporal variations in plant nodulation and growth, and in efficiency of utilisation of the rhizobial symbiosis. The latter was associated with a large rhizobial diversity, including new bean nodulating species. Macrosymbiont diversity in SNF and adaptation to NaCl was found. However, contrasts between plant genotypes could be altered by specific interactions with some native rhizobia. Therefore, variations in soil rhizobial population, in addition to agronomic practices and environmental constraints, may have contributed to erratic results observed in field inoculations. At the mechanistic level, nodule C and N metabolisms, and abcissic acid content, were related to SNF potential and tolerance to NaCl. Their relation with nodule conductance to O2 diffusion was addressed by in situ hybridisation of candidate carbonic anhydrase and aquaporin genes in nodule cortex. The limits and prospects of the cooperative strategy are discussed.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Rhizobiaceae
/
Simbiosis
/
Phaseolus
Tipo de estudio:
Clinical_trials
País/Región como asunto:
Europa
Idioma:
En
Revista:
J Biotechnol
Asunto de la revista:
BIOTECNOLOGIA
Año:
2001
Tipo del documento:
Article
País de afiliación:
Francia
Pais de publicación:
Países Bajos