PJB-2018-1062
Rhizobia strains alleviate salinity in faba beans (Vicia faba) to valorize marginal sols
Boulbaba L Taief, Neila Abdi, Sihem Smari, Amel Ayari-Akkari, Mouna Jeridi, Manar D. Alsenidi, Shumail Tanweer and Bouaziz Sifi
Abstract
Soil salinity remains the most limiting parameter for the growth and enhancement of Vicia faba L (faba bean) in Tunisia. Plant growth promoting rhizobacteria abbreviated as (PGPR) has emerged as a novel way to minimize the negative effects of salinity and improve the nutrient accessibility. The objective of this work is to investigate the protective effects of two newly isolated PGPR (rhizobia stains S1 and S2) over 150 mM NaCl salinity stress. Physiological, biochemical parameters and antioxidant enzymes activities in faba bean culture were measured. The Results showed that salt stress increased nodule biomass in plants inoculated by S1 with significant difference compared with plants inoculated by S2. Salinity considerably augmented the level of nitrogen in root and shoot if it was inoculated by S1 while no change was observed with S2 inoculation. Under salt stress, the higher content of K+ and Na+ level was observed in plants inoculated with S1 than in plant inoculated by S2. EL showed a high increase (80%) in leaves of plant inoculated with S2 was observed under 150 mM NaCl against (10.71 %) in leaves of plant inoculated with S1 after 10 days of inoculation. After 30 days of inoculation under salinity faba bean-S1 showed the higher value of PPO (8.86 µmol g-1FM) and without salt, the PPO activity was 2 µmol g-1FM. After 40 to 50 days of inoculation, plants inoculated by S1 and S2 showed the higher values of phenol content under salinity. The results indicated that salinity significantly increases the proline accumulation by the leaves and root of faba bean inoculated with S1. But chlorophylls level was not affected. This study indicates that the S1 rhizobia strain is a prospective inoculant candidate which is essential for promoting growth and production, and thereby reducing the effect of salinity on faba bean plant.
To Cite this article:
L’Taief, B., N. Abdi, S. Smari, A. Ayari-Akkari, M. Jeridi, M. D-Alsenidi, S. Tanweer and B. Sifi. 2020. Rhizobia strains alleviate salinity in faba beans (Vicia faba) to valorize marginal sols. Pak. J. Bot., 52(5): DOI: http://dx.doi.org/10.30848/PJB2020-5(41)
Download
