Drought stress mitigation with humic acid in two Cucumis melo L. genotypes differ in their drought tolerance


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Kiran S., BAYSAL FURTANA G. , Talhouni M., ELLİALTIOĞLU Ş. Ş.

BRAGANTIA, vol.78, no.4, pp.490-497, 2019 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 78 Issue: 4
  • Publication Date: 2019
  • Doi Number: 10.1590/1678-4499.20190057
  • Title of Journal : BRAGANTIA
  • Page Numbers: pp.490-497
  • Keywords: melon, drought, plant breeding, lipid peroxidation, antioxidant enzymes, HYDROGEN-PEROXIDE, WATER-STRESS, PLANT, GROWTH, SUBSTANCES, SALINITY, LEAVES, YIELD, SALT

Abstract

Different responses of two melon (Cucumis melo L.) genotypes (Semame, drought and salt-tolerant and Ananas, drought and salt- sensitive) to drought stress with or without humic acid ( HA) treatment were studied. The experiment was carried out under greenhouse conditions. The experimental design was two factorial randomized block with 4 replicates. HA treatment increased the shoot fresh and dry weights and leaf area of both genotypes under drought stress. HA stimulated accumulation of K and Ca ions, chlorophyll (SPAD value) and antioxidant enzyme activity (superoxide dismutase-SOD, catalase-CAT and glutathione reductase-GR) in both genotypes. This effect was more clear in the Semame genotype than in Ananas. As a result, HA treatment has been proved to influence the ability of melon genotypes to cope with drought stress and to increase their tolerance.