Benefits of dual inoculation with arbuscular mycorrhizal fungi and rhizobia on Phaseolus vulgaris planted in a low-fertility tropical soil
The growth response of Phaseolus vulgaris to dual inoculation with arbuscular mycorrhizal (AM) fungi and rhizobia was studied in a low-fertility tropical soil in Madagascar. Two isolates of AM fungi identified as Acaulospora sp. and Glomus sp., respectively, along with a cocktail of ten Rhizobium spp. strains were used to conduct a greenhouse experiment in a fully randomized block design with two factors. The Phaseolus vulgaris seedlings received one of the following inoculation treatments: no inoculation, separate inoculation with each of the three microbial symbionts (the two AM fungal isolates and the rhizobia), and co-inoculation with each of the two AM fungal isolates and the mix of rhizobium strains. The results showed an additive effect of co-infection by AM fungi and rhizobia on plant growth and on the total N content of the plants, along with a synergistic effect on the total P content, the number of nodules and the mycorrhizal rate of the plants. Dual symbiosis with native strains contributes to the success of legumes, especially in harsh environments and low-fertility tropical soils.
| Main Authors: | , , , , , , , |
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| Format: | article biblioteca |
| Language: | eng |
| Published: |
Elsevier
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| Subjects: | F60 - Physiologie et biochimie végétale, F62 - Physiologie végétale - Croissance et développement, Phaseolus vulgaris, mycorhize arbusculaire, Rhizobium, sol tropical, fertilité du sol, Acaulospora, Glomus, inoculation des racines, http://aims.fao.org/aos/agrovoc/c_5767, http://aims.fao.org/aos/agrovoc/c_1415699873241, http://aims.fao.org/aos/agrovoc/c_6563, http://aims.fao.org/aos/agrovoc/c_7978, http://aims.fao.org/aos/agrovoc/c_7170, http://aims.fao.org/aos/agrovoc/c_31769, http://aims.fao.org/aos/agrovoc/c_31772, http://aims.fao.org/aos/agrovoc/c_35955, http://aims.fao.org/aos/agrovoc/c_4510, |
| Online Access: | http://agritrop.cirad.fr/597058/ http://agritrop.cirad.fr/597058/7/ID597058.pdf |
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