Triazole compounds alters the antioxidant and osmoprotectant status in drought stressed Helianthus annuus L. plants

Abstract

A pot-culture experiment was conducted to estimate the ameliorating effect of triazole compounds Hexaconazole, Tebuconazole and Propiconazole on drought stress in sunflower (Helianthus annuus L.). The plants were subjected to drought (DID) stress after four days of interval from the 30th day of sowing (DAS). One-day-interval irrigation was kept as control. The plant samples were collected and separated into root, stem and leaf for estimating the amino acid (AA), proline (PRO) and glycine betaine (GB) contents and the activities of antioxidant enzymes. Drought stress and triazole treatments increased AA, PRO and GB contents, superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT) activities when compared to control. From the results of this investigation, it can be concluded that the application of triazole compounds caused a partial amelioration of the adverse effects of drought stress by its influence on antioxidant potentials in H. annuus.

Combined GWAS and Transcriptome Analyses Provide New Insights Into the Response Mechanisms of Sunflower Against Drought Stress

“…Some agronomic measures can mitigate the damage of drought impact on plants, such as exogenous applications of plant hormones, osmotic regulators, and mineral nutrients (Salami and Saadat, 2013 ; Rabert et al, 2014 ). However, these changes are not heritable, and need additional labor, capital, and technology investment.…”

Impact of exogenously applied trehalose on leaf biochemistry, achene yield and oil composition of sunflower under drought stress

“…Major environmental stresses such as drought, salinity and temperature impose a negative impact on plant's growth and development, ion uptake, primary and secondary metabolites, and oxidative system. Of them, drought is the most injurious one, because it markedly impairs growth and development of crops and their yield (Ashraf et al 2011, Rabert et al 2014, Akram et al 2016). Drought stress influences adversely the rate of photosynthesis, water transport and nutrition system, and formation of seeds (Aslam et al 2013).…”

Effects of Paclobutrazol and Flurprimidol on Water Stress Amelioration in Potted Red Firespike

“…The triazol PGRs reduced transpiration, increased the relative water content, membrane stability, and significantly increased yield in wheat grown under water stress (Sairam et al, 1995). Rabert et al (2014) suggests the enhanced drought tolerance in triazoletreated plants is due to maintaining a balance between formation and detoxification of activated oxygen species, resulting in an improved response of plants to drought-induced oxidative stress. Sankar et al (2007) showed the adverse effects of water stress can be minimized with the application of PBZ, which increased the antioxidant levels and activities of scavenging enzymes.…”

“…ater stress is one of the major abiotic stresses negatively affecting plant production and quality (Rabert et al, 2014). Plant responses to water stress involve either adaptive changes in metabolism and overall plant structure or deleterious effects such as reduced net photosynthesis and yield or leaf abscission (Durner, 2013;Vu et al, 2001).…”