Comparative efficacy of different salt tolerant rhizobial inoculants in improving growth and productivity of Vigna radiata L. under salt stress

作者：Qasim Ali, Muhammad Shabaan, Sana Ashraf, Muhammad Kamran, Usman Zulfiqar, Maqshoof Ahmad, Zahir Ahmad Zahir, Muhammad Junaid Sarwar, Rashid Iqbal, Baber Ali, M. Ajmal Ali, Mohamed S. Elshikh, Muhammad Arslan · 发表于：Scientific Reports · 年份：2023 · DOI：10.1038/s41598-023-44433-8 · 被引用次数：56 · 研究领域：Legume Nitrogen Fixing Symbiosis、Agronomic Practices and Intercropping Systems、Plant Growth Enhancement Techniques

Abstract Worldwide, salinity severely affects agricultural production of crops such as mung bean in arid and semi-arid regions. In saline conditions, various species of Rhizobium can be used to enhance nodulation and induce salinity tolerance in maize. The present study conducted a pot experiment to determine the efficiency of three rhizobial isolates under different salinity conditions, such as 1.41, 4 and 6 dS m −1 , on mung bean growth parameters, antioxidant status and yield. Results revealed that salt stress imparted adverse effects on the growth, antioxidants, yield and nodulation of mung bean. Under high salt stress conditions, fresh weights were reduced for roots (78.24%), shoots (64.52%), pods (58.26%) and height (32.33%) as compared to un-inoculated control plants. However, an increase in proline content (46.14%) was observed in high salt stressed plants. Three Rhizobium isolates (Mg1, Mg2, and Mg3), on the other hand, mitigated the negative effects of salt stress after inoculation. However, effects of Mg3 inoculation were prominent at 6 dS m −1 and it enhanced the plant height (45.10%), fresh weight of shoot (58.68%), root (63.64%), pods fresh weight (34.10%), pods number per plant (92.04%), and grain nitrogen concentration (21%) than un-inoculated control. Rhizobium strains Mg1, and Mg2 expressed splendid results at 1.41 and 4 dS m −1 salinity stress. The growth promotion effects might be due to improvement in mineral uptake and ionic balance that minimized the in...