Improving salt tolerance of bean ( L.) with hydrogen sulfide.

The current study examined the HS applications on growth, biochemical and physiological parameters of bean seedlings under saline conditions. The findings of the study indicated that salt stress decreased plant growth and development, photosynthetic activity, and mineral and hormone content [excluding abscisic acid (ABA)] in bean seedlings. Plant and root fresh mass and dry mass with HS applications increased as compared to the control treatment at the same salinity level. Both salinity and HS treatments significantly affected the net assimilation rate, stomatal conductance, transpiration rate, and intercellular CO content of bean seedlings. Significant increases occurred in HO, malondialdehyde (MDA), proline, sucrose content, enzyme activity, and ABA content with salt stress. However, HS applications inhibited the effects of salinity on plant growth, photosynthetic activity, and mineral content in beans. HS applications reduced HO, MDA, proline, sucrose content, enzyme activity, and ABA content in beans. As a result, exogenous HS applications could mitigate the negative impacts of salinity in beans.