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A comparison of Bradyrhizobium strains using molecular, cultural and field studies
- Source :
- Plant Science
- Publication Year :
- 1999
- Publisher :
- Elsevier BV, 1999.
-
Abstract
- Acacia mangium# is a leguminous tree used in industrial plantations for the production of pulp wood, and for the rehabilitation of degraded soils. Its ability to grow in very poor soils is due to its symbiotic association with nitrogen-fixing #Bradyrhizobium#. In this study, 33 isolates of #Bradyrhizobium# and #Rhizobium# obtained from #A. mangium# plantations in Sabah, Malaysia, were characterised by PCR amplification of ribosomal DNA and RFLP analysis, host spectrum and antibiotic resistance. The Sabah isolates were also compared with isolates collected from Singapore, Australia, and Africa. The results distinguished two main groups of #Bradyrhizobium#. Group I strains were prevalent, widely dispersed but genetically closely related. They were also closely related to the Singapore and Australian strains. Strains from Group II were less widely dispersed and more distantly related. Greenhouse and field inoculation trials with #A. mangium# seedlings showed that the Group I strains were more effective in enhancing plant growth than Group II strains. (Resume d'auteur)
- Subjects :
- Graine
ADN
Plant Science
F30 - Génétique et amélioration des plantes
Récupération des sols
Acacia mangium
Bradyrhizobium
Génétique
food and beverages
General Medicine
méthode
Horticulture
Technique de l'isolement
Nitrogen fixation
Rhizobium
Restriction fragment length polymorphism
Développement biologique
Analyse biologique
Antibiotique
Biology
Inoculation
Symbiosis
Botany
Genetics
Bactérie fixatrice de l'azote
Ribosomal DNA
P36 - Érosion, conservation et récupération des sols
Résistance aux produits chimiques
biology.organism_classification
K10 - Production forestière
Agronomy and Crop Science
Subjects
Details
- ISSN :
- 01689452
- Volume :
- 141
- Database :
- OpenAIRE
- Journal :
- Plant Science
- Accession number :
- edsair.doi.dedup.....fb585d88e5e0a441a086910f355acf16