PHYSIOLOGICAL STUDIES ON WHEAT PLANT IN RESPONSE TO SALT STRESS

Abstract

A Pot experiment was carried out during seasons (2015/2016-2016/2017), designed a two-factorial factors experiment in a layout of RCBD. The study aimed to evaluate the physiological and growth responses of wheat plant subjected to different levels of diluted Mediterranean seawater salts and investigate the best strategy, which could be used to enhance salinity negative impact using either seedling priming, foliar spraying of sodium nitroprusside in concentration of 150 µM or different potassium ferti-irrigation doses. In addition, their effect on potassium and sodium concentration distribution among wheat parts. Twenty treatments, irrigated by ½ Hoagland strength and saline solution (ppm) (Control, 2000, 4000, 6000) and five treatments; Control, sprayed by tween 20, 150 µM Sodium nitroprusside used as seedling priming (SNP-P) and foliar spraying (SNP-S) as well as potassium applied in two doses 50% K and 200% K. Results clearly indicated that salinity stress showed having dual impact on plant growth and yield parameters depends on solutes concentration, in which an encouraging trend was observed until 2000-ppm and adversely effect was noticed in 4000 and 6000-ppm.