Understanding the Role of Physiological and Agronomical Traits during Drought Recovery as a Determinant of Differential Drought Stress Tolerance in Barley

The fast and efficient recovery could be an important trait defining the efficacy of plant drought adaptation. In this work, we aimed to develop a set simple appropriate physiological proxies that used as reliable indicators predict responses validate role specific traits such root length, stomata density, residual transpiration, in tolerance barley. Eighty barley (Hordeum vulgare L.) genotypes were subjected progressive droughting until soil moisture level reached 10%, followed by rewatering. Plants visually scored at end period two weeks after SPAD values chlorophyll fluorescence Fv/Fm ratio also measured, alongside with stomatal density (SD) transpiration (RT). same germinated paper rolls treated 15% (w/v) polyethylene glycol (PEG) 8000 quantification changes growth patterns. Responses stress varied among genotypes, scores significantly correlated each other. Changes value, length indices. Both indices strongly SD RT irrigated plants, although unexpected direction. We have extent plants’ their ability grow saline soils (a condition often termed “physiological drought”) found positive association between these traits. fact tolerant genotype possessed higher salinity implies some common mechanisms conferring both having less more under conditions showed tolerance. It is concluded lower optimal may for