Waterlogging effects on some antioxidant enzymes activities and yield of three wheat promising lines

Abstract

<p>Waterlogging is one of the most important environmental stresses that have negative effects on wheat growth and yield. The purpose of this study was to investigate the effect of waterlogging (0, 7, 14 and 21 d) at tillering (ZG21) and stem elongation (ZG31) stages on the content of photosynthetic pigments, proline, malondialdehyde (MDA), antioxidant enzymes, grain yield and yield components of three wheat promising lines (N-93-19, N-93-9 and N-92-9). Increasing waterlogging stress reduce the photosynthetic pigments contents and the activity of catalase enzyme while increase the proline content, MDA, superoxide dismutase and peroxidase enzymes in three wheat genotypes in both tillering and stem elongation stages. Waterlogging also reduced yield and yield components in three wheat genotypes. The results showed that N-92-9 genotype had better response than other two genotypes in all studied traits under waterlogging conditions.</p>

Screening of Soybean Genotypes for Waterlogging Stress Tolerance and Understanding the Physiological Mechanisms

“…Plants are randomly revealed to unfavorable environmental circumstances, which are named as abiotic stresses, for instance, waterlogging, drought, salinity, heavy metal stress, high temperature, nutrient stress, radiation, and environmental pollution [1], and as a result pose a serious ultimatum to crop production. Waterlogging in cultivated areas is a common abiotic stress which has severe influences on the composition and production of soybean [2,3] and most crops' species worldwide [4,5]. Excess rainfall, tides, floods, storms, and lack of adequate drainage facilities are the causes of waterlogging stress in plants [6].…”

Effects of grafting on the morphology, physiology, and aerenchyma of balsam pear aboveground under waterlogging stress

“…POD and CAT reduced some of the H2O2 at 2-16 days of waterlogging, and the SOD activity of grafted balsam pear was no longer inhibited and thus increased rapidly. This result is different from those observed in Zea mays L. and Triticum aestivum L. probably due to different test conditions and materials used (Li et al, 2018;Alizadeh-vaskasi et al, 2018). Plants enhance their stress resistance by accumulating considerable amounts of soluble sugar, soluble protein, and proline to improve cell sap concentration, which can maintain cell turbidity and prevent excessive plasma dehydration (Guo et al, 2018), thereby stabilizing their intracellular macromolecular structure and maintaining enzyme activity (Figure 6).…”

“…Antioxidant enzyme activity is an important indicator of plant resistance because antioxidants can effectively remove ROS (Foyer et al, 2018;Gong et al, 2018). Waterlogging stress can increase the enzyme activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) and thus cause ROS scavenging (Li et al, 2018;Alizadeh-Vaskasi et al, 2018). Water potential in plant leaves decreases under waterlogging stress, but some plants, such as Robinia pseudoacacia L. and Triticum aestivum L. (Yang et al, 2018;Khosravi et al, 2018), can maintain the normal morphology of leaves by accumulating osmotic substances.…”

Wheat Crop under Waterlogging: Potential Soil and Plant Effects

“…Carotenoids also play an important role in oxidative stress tolerance, contributing to protect the photosynthetic apparatus by scavenging ROS and repressing lipid peroxidation [ 20 ]. Waterlogging can affect the concentration of carotenoid pigments and several studies reported their reduction in wheat-susceptible plants [ 57 , 81 , 94 ]. However, in tolerant genotypes, the amount remained high [ 95 ].…”

“…Overall, the decline in carotenoid content is more severe in plants subjected to longer waterlogging periods. At the tillering stage, carotenoid contents decreases by 11–15%, 16–38%, and 29–67% after 7, 14, and 21 days of waterlogging, respectively [ 94 ]. The same study reported that 14 days of waterlogging at elongation stage caused a more severe carotenoid lowering (32–49%), highlighting different effects according to crop development phase.…”