Water-condition effects on rhizobia competition for cowpea nodule occupancy
Two indigenous bradyrhizobia strains displaying different natural behaviours towards water regime (strain ORS 3257, nodulating more frequently in favourable-water conditions and strain ORS 3260, in limited-water conditions) were studied for their competitivity for nodulation of cowpea (Mouride cultivar) under favourable and limited water conditions in non-sterile soil. The nodule occupancy was studied by PCR-RFLP analysis. Both strains showed good competition with other indigenous rhizobia populations under favourable- and limited-water conditions. Competition between the inoculated strains in the mixture varied between water regimes. In non-limited-water conditions, strain ORS 3257 was the best competitor, whereas in limited-water conditions, strain ORS 3260 was the best competitor. Results indicated that screening of strains according to their environmental origin could ensure successful rhizobia Inoculation.
| Main Authors: | , , , , , |
|---|---|
| Format: | article biblioteca |
| Language: | eng |
| Subjects: | F62 - Physiologie végétale - Croissance et développement, P34 - Biologie du sol, |
| Online Access: | http://agritrop.cirad.fr/539571/ http://agritrop.cirad.fr/539571/1/document_539571.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|