Effects of Two Salt Tolerant Pseudomonas Strains on the Germination of Rapeseed Seeds under Salt Stress

Abstract

In order to investigate the effect of plant rhizosphere growth promoting bacteria on the germination of rapeseed seeds under salt stress, the germination of rapeseed seeds, which were soaked with the plant rhizosphere Pseudomonas koreensis and Pseudomonas veronii in the saline soil from the Zigong salt mining area, was studied on the paper sprout bed under different concentrations of NaCl (0, 50, 100, and 200 mmol/L) stress. The results showed that both ST29 and ST38 bacterial suspensions could increase the germination potential, germination rate, and germination index of rapeseed seeds under different concentrations of NaCl stress. At the same time, these two strains promoted the growth of rapeseed radicle and embryo, and ST38 had a higher promoting effect on the growth of rapeseed radicle and embryo than ST29. From above, it indicated that plant rhizosphere salt tolerant bacteria could improve the germination ability of rapeseed under salt stress and help to enhance the stress resistance and to promote the growth ability of rapeseed after germination.