PJB-2019-790
Effect of sodium salt stress on the growth of Elymus repens
Muhammad Junaid Yousaf
Abstract
ABSTRACT Plants are sensitive to the external environment that may either be in form of biological stress such as any pathogenic effect or abiological stress such as salt stress. Among the salt stresses, the most prominent stress is known as sodium salt stress, because sodium involves in a wide range of plant metabolic activities preceded by calcium. To investigate the effect of sodium ion on plant, seeds of E. repens seeds are first imbibed in distilled water for 2 hours, surface sterilized with 70% ethanol and then growth in sodium nitrate, sodium bisphosphate monobasic, trisodium citrate, sodium bromide, sodium carbonate, and sodium dichromate for 7 days in the concentration of 0.2%, 0.4%, 0.6%, 0.8%, 1% of salts compared with distilled water as control for each. At 8th day of germination, root and shoot length were noted using scale and fresh weight of root and shoot was noted using digital balance while dry weight of root and shoot was noted after drying them in incubator for 72 hours. Noted data elucidated that seedlings showed high growth in sodium nitrate while low growth in trisodium citrate, sodium carbonate and sodium dichromate. Growth in sodium bisphosphate and sodium bromide had slightly high growth with increasing concentration of salt but still low compared to control. Moreover data for each salt was also used to find out the vigour index, stem weight ratio, root weight ratio, root stem ratio and relative water content to analyse the effect of salts on different aspects of plant growth. Keyword: E. repens, growth condition, germination, vigour index, salt stress
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