Synergistic effect of Pseudomonas alkylphenolica PF9 and Sinorhizobium meliloti Rm41 on Moroccan alfalfa population grown under limited phosphorus availability

Farssi, Omar; Saih, Rabie; Moukhtari, Ahmed El; Oubenali, Aziz; Mouradi, Mohammed; Lazali, Mohamed; Ghoulam, Cherki; Bouizgaren, Abdelaziz; Berrougui, Hicham; Farissi, Mohamed

doi:10.1016/j.sjbs.2021.03.069

Cited by 12 publications

(13 citation statements)

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“…The research was carried out in a growth chamber at the Polydisciplinary Faculty of Beni Mellal (Sultan Moulay Slimane University, Morocco) using the Oued Lmalah (OL) population. The OL population was chosen according to our previous study (Farssi et al, 2021).…”

Section: Experimental Designmentioning

confidence: 99%

“…Furthermore, alfalfa's pivoting root system gives it the ability to absorb water by up to 3 m in depth (El-Ramady et al, 2020), as a result of adaptation to some extreme abiotic stresses such as drought and salinity. However, its growth is highly susceptible to soil nutrient deficiency and, especially, phosphorus (P) deficiency (Farssi et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…It plays important roles in energy transfer, respiration, enzyme activation/inactivation, photosynthesis, and root elongation (Elhaissoufi et al, 2020). Moreover, P has also been known to play a vital role during biological nitrogen fixation (BNF) in legumes, since 20% of total plant P being allocated to nodules (Bargaz et al, 2021;Farssi et al, 2021). P also represents the main constituent of plants cell including nucleic acids, membrane phospholipids, etc.…”

Section: Introductionmentioning

confidence: 99%

“…PSB are a large group of soil microorganisms that have the ability to mobilize directly or indirectly P from both the organic and inorganic sources and make it available for plant use. Among the PSB, Pseudomonas alkylphenolica (P. alkylphenolica) has been recently considered as one of the most effective PSB, which continues to be a key research priority (Farssi et al, 2021). Thus, when P-stressed alfalfa plants were inoculated with P. alkylphenolica PF9 strain, they exhibited higher biomass production, photosynthesis activity, and P content (Farssi et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Among the PSB, Pseudomonas alkylphenolica (P. alkylphenolica) has been recently considered as one of the most effective PSB, which continues to be a key research priority (Farssi et al, 2021). Thus, when P-stressed alfalfa plants were inoculated with P. alkylphenolica PF9 strain, they exhibited higher biomass production, photosynthesis activity, and P content (Farssi et al, 2021). Another interesting study conducted by Shi et al (2019) showed that P. alkylphenolica strain was able to remove mercury (Hg) in the solution, immobilize Hg in soil, promote growth, decrease Hg accumulation, and improve photosynthesis of Brassica campestris exposed to Hg stress.…”

Section: Introductionmentioning

confidence: 99%

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Silicon- and Phosphate-Solubilizing Pseudomonas alkylphenolica PF9 Alleviate Low Phosphorus Availability Stress in Alfalfa (Medicago sativa L.)

et al. 2022

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Low phosphorus (P) availability is a major limiting factor facing current agriculture in several agricultural areas. Many P fertilizers are applied to enhance P availability; however, the major part is likely to lose due to various processes related to P cycle. Silicon (Si) treatment and P-solubilizing bacteria inoculation have been emerged as a promising way to improve plant P nutrition. This study aimed to investigate the synergistic effects of Si treatment and Pseudomonas alkylphenolica PF9 strain inoculation on plant growth, P nutrition, acid phosphatase (APase) activity, oxidative stress markers, and antioxidant metabolism in the Moroccan alfalfa population Oued Lmalah (OL) under low P availability. Results revealed a significant reduction in dry biomass, plant height, leaf number, and area under low P conditions. P deficiency also altered P nutrition and chlorophyll (Chl) content. However, P-deficient alfalfa plants treated with Si or inoculated with PF9 strain displayed higher plant growth, Chl content, and remarkably the effect was much higher when Si was applied together with PF9 strain. Moreover, the simultaneous application of Si and PF9 strain to the P-deficient alfalfa plants improved APase activity and as a result, P contents in both the shoots and roots. Results also showed that the application of both the Si and PF9 counteracted the low P availability stress-induced oxidative damage by lowering the accumulation of reactive oxygen species (ROS), electrolyte leakage, and lipid peroxidation. This seems to be related to the ability of both the Si and PF9 strain to modulate both the enzymatic and non-enzymatic antioxidant molecules including superoxide dismutase activity, total polyphenols, flavonoids, and proline contents. Our findings suggest that the combined application of Si and P. alkylphenolica PF9 strain could be a promising way for improving growth of alfalfa under low-P availability.

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Section: Experimental Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%