Abstract
Because of their potential to increase plant nutrition and yield, the use of some microorganisms in low-input agriculture and forestry has been addressed for successful agroecological investigations. A pot experiment was conducted to study the effects of some plant growth-promoting rhizobacteria (PGPR) on arbuscular mycorrhizal fungi (AMF) and growth of KP29’s peanut variety grown in the northwest of Morocco. Seeds were inoculated with three Pseudomonas (PP22, GP70, and GR1) and two Aeromonas strains (PR29 and GR70). Then, they were grown in two unsterilized soils collected from subsistence farmers’ fields of Laaouamra and Moulay Bousselham. Plant harvesting was made after 60 days of cultivation under growth chamber conditions, and the roots were removed and rinsed carefully. Results showed positive and negative effects of these rhizobacteria on growth and mycorrhization of peanut. Pseudomonad strains gave the greatest plant nutrient content (N, P, and K) and growth parameters. Also, bacterial inoculation had a positive impact on peanut mycorrhization by enhancing arbuscular abundance. Highest stimulation was noticed with pseudomonad strains on both soils. In addition, PR29 exhibited maximum values of mycorrhizal colonization on the soil of Laaouamra. However, the magnitude effect of inoculation on plant growth and mycorrhizal infection varied according to the origin of soils. On the other hand, only PP22 stimulated nodules formation on the soil of Laaouamra. In conclusion, this study reveals that GP70, GR1, and PP22 can enhance growth, yield, and nutrient uptake of peanut. They can also enhance biological nitrogen fixation and mineral uptake in combination with AMF.
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Bouhraoua, D., Aarab, S., Laglaoui, A., Bakkali, M., Arakrak, A. (2017). Arbuscular Mycorrhization and Growth Promotion of Peanut (Arachis hypogaea L.) After Inoculation with PGPR. In: Kumar, V., Kumar, M., Sharma, S., Prasad, R. (eds) Probiotics in Agroecosystem. Springer, Singapore. https://doi.org/10.1007/978-981-10-4059-7_4
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DOI: https://doi.org/10.1007/978-981-10-4059-7_4
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