Effects of Salinity stress on Seedling growth of Vigna radiata (L.) Wilczek

Abstract

Salinity reduces mung bean (Vigna radiata) radicle and root elongation, delays and inhibits hypocotyl elongation and mobilization of reserves from the cotyledons to the embryo axis. Fresh and dry masses and water content of the embryo axes were reduced. Under salinity, a net leakage of K to the media increased with time and increasing NaCl concentrations. Sugars present in the cotyledons of seeds were of primary importance for growth of the embryo axis up to 18 h after sowing whereas breakdown of starch by amylase contributed later, the contribution being delayed and reduced with increasing NaCl concentration. Even when amylase activity in the cotyledons was progressively reduced with increasing NaCl concentration, the increasing contents of soluble sugars in the cotyledons indicated that sugars were not limiting for mung bean seedling growth under salinity. Salinity stress is a major environmental factor limiting crop productivity worldwide. This research aims to investigate the effects of salinity stress on the germination of mung bean (Vigna radiata) seeds and explore potential mitigation strategies to enhance germination rates under saline conditions. The objective of our research was to study the effect of salinity stress on mung beans (Vigna radiata) germination by observing the result of increasing salt concentrations on the germination of mung bean seeds. The primary aim of this research is to investigate the effect of salinity stress on the germination of mung bean (Vigna radiata) seeds. This study focuses on evaluating key germination parameters, including germination percentage, germination rate, and mean germination time, under varying levels of salt concentration.

Keywords: Salinity, seedlings, germination, salt concentration.