Study of Bread Wheat Genotype Physiological and Biochemical Responses to Drought Stress

Abstract

This study investigates the impacts of drought-induced stress on the responses of ten bread (common) wheat genotypes to the physiological parameters and activities of POX, catalase CAT, and SOD under irrigation and stress conditions. The results of variance and mean comparison analysis indicated that the drought stress increased the activity of CAT while significantly decreased POX and SOD levels. In comparison with the irrigated plants, the photochemical efficiency of photosystem II (Fv/Fm) didn't change significantly; however, the concentration of chlorophyll and the relative water content in the flag leaves decreased in response to harsh environmental conditions. The observations included a significant enzyme activity in cultivar's interactions with the environment, which indicates various biochemical reactions of bread wheat plants under stress and non-stress environmental conditions.

Impact of salicylic acid and sodium hydrosulfide applied singly or in combination on drought tolerance and grain yield in wheat plants

“…The adverse impact of DS on wheat plants is evident in the reduction of maximum Fv/Fm and chlorophyll content. This observation aligns with previous findings in alfalfa (HuiHui et al., 2018), wheat (Gholamin & Khayatnezhad, 2020), and sugarcane (Pincelli & Barbosa, 2018). However, there is a lack of research exploring the combined application of SA and NaHS concerning plant responses to drought stress.…”

Genetic relationships between populations of Aegilops tauschii Coss. (Poaceae) using SCoT molecular markers

“…The coupling of ecological and genetic data will provide the most suitable background for preserving the ability of the biota to respond the rapid environmental changes (Sun and Khayatnezhad 2021;Tao et al, 2021;Wang et al, 2021;Xu et al, 2021;Yin et al, 2021;Zhang et al, 2021). The literature reports the following basic factors influencing the distribution of genetic vari- ation: habitat specify, plant-insect interactions, connectivity and disturbance, dispersal ability, species lifespan, reproductive rates and existing genetic diversity (Gholamin and Khayatnezhad, 2020a;, 2020c. Genetic diversity when analysed by neutral markers does not correspond to the adaptive ability of plant populations, but these types of markers are very useful for the interpretation of the past landscapes, refugia and gene flow (Brandvain et al, 2014).…”

Recientes aplicaciones de la fluorescencia de la clorofila en los cultivos vegetales

“…Los ensayos de fluorescencia de la clorofila en las plantas sometidas a la salinidad han mostrado que el transporte de electrones es el parámetro más sensible, lo que indica la inactivación de los centros de reacción del fotosistema II. Una disminución en el rendimiento cuántico máximo (Fv/Fm) del FII en respuesta a la sal fue reportado para Portulaca oleracea, una planta suculenta que se ha usado en la medicina popular [20], y en cultivos que se siembran a campo abierto como el maíz [21]. Los parámetros de fluorescencia han facilitado una rápida y precisa medición del nivel de tolerancia al estrés por salinidad de ocho genotipos de cebada [22]; lo que sin duda favorece la planeación en la plantación de los cultivos en zonas con este problema.…”