Change in physiological and biochemical parameters under drought stress in salt-tolerant and salt-susceptible eggplant genotypes

Abstract

This study was carried out to determine the changes in chlorophyll and ion contents, lipid peroxidation level, and antioxidative enzyme activities of 4 eggplant genotypes (Mardin Kızıltepe (MK), Burdur Merkez (BM), Artvin Hopa (AH), and Kemer (K)) with different salt tolerance levels under drought stress. Experiments were conducted in a greenhouse with controlled climatic conditions. When the plants reached the 3-4 leaves stage, 3 different treatments were applied to create the drought levels. The first condition in the study was obtained through control application treatment (D 0 ), which was depletion of 40% of the available water holding capacity. The second application (D 1 ) was depletion of 90% of the available water holding capacity. The third application (D 2 ) was no applied irrigation water. Plants were analyzed with regards to chlorophyll and ion contents, lipid peroxidation levels, and antioxidative enzyme activities. Significant differences were observed among interactions of genotypes and levels of drought stress in chlorophyll and ion (K + , Ca 2+ , Zn 2+ , Mn 2+ , and Fe 2+ ) contents, lipid peroxidation levels, and activities of antioxidant enzymes (superoxide dismutase-SOD, catalase-CAT, glutathione reductase-GR, and ascorbate peroxidase-APX). The chlorophyll and ion contents of eggplant genotypes under drought stress decreased. However, different levels of lipid peroxidation and antioxidative enzyme activities were observed. The situation changed depending on genotypes. Lipid peroxidation levels increased under drought stress, especially in salt-sensitive genotypes (AH and K). On the other hand, the activities of antioxidative enzymes in the salt tolerant MK and BM genotypes significantly increased. With regard to the investigated traits, salt-tolerant genotypes were also found to be quite tolerant against drought stress.

Identification of Metabolites Changes and Quality in Strawberry Fruit: Effect of Cultivation in High Tunnel and Open Field

“…In this study, statistically significant differences were determined between the applications and the phenolic acid contents of the genotypes ( p < 0.05). These differences between varieties and applications have also been reported in other studies [ 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ]. Different studies have been conducted to identify and determine phenolic compounds in strawberry fruits [ 17 ].…”

Growth and Antioxidant Responses of Lettuce (Lactuca sativa L.) to Arbuscular Mycorrhiza Inoculation and Seaweed Extract Foliar Application

“…Mycorrhizae regulate plant physiological functions such as leaf water potential, stomatal conductance, photosystem II efficiency, and carbon dioxide stabilization and this even occurs under stressful conditions [67]. It also improves nitrogen uptake by increasing the activity of nitrogen-absorbing enzymes such as glutamine synthase, and ultimately leads to an increase in proteins and amino acids content [10].…”

Chemical Composition of Pinus nigra Arn. Unripe Seeds from Bulgaria

“…Previous studies have shown that the chemical composition of plant organs and their active substances are the result of the interaction between plants and the environment in the long process of evolution. The content of some substances can increase significantly under certain environmental conditions such as altitude, average annual temperature, soil characteristics, precipitation, and sunshine [28][29][30][31][32][33][34].…”