Strigolactone-Mediated Mitigation of Negative Effects of Salinity Stress in Solanum lycopersicum through Reducing the Oxidative Damage

Soil salinity is one of the main barriers to increasing global food production as it reduces crop growth and productivity. While irrigated lands in arid climates (about 20% total affected) are more prone salinization, many other natural anthropogenic factors contribute an increase arable that currently affects over 100 countries than billion ha. Management agro-ecosystems at every level, including soil, water, plant itself, important mitigating effects salinity. Plant hormones control cellular metabolism, mediate defense response mechanisms against abiotic biotic stresses. Foliar fertigation with regulators has been shown improve metabolism under stress conditions. Strigolactones (SLs) have emerged a group novel phytohormones several functions interactions microorganisms, development, responding environmental cues. The present research addressed SL (GR24) on growth, photosynthetic parameters, oxidative Solanum lycopersicum stress. Growth indices, photosynthesis related attributes, antioxidant enzyme activity, malondialdehyde (a product lipid peroxidation) hydrogen peroxide concentrations were compared unstressed salt-stressed (NaCl; 150 mM) S. seedlings untreated or treated GR24 (2 µM). Improved proline (8%) protein (14%) contents, (33%) transpiration (34%) parameters treatment result significant viz., shoot length (29%), root (21%), fresh weight (31%), (23%), dry (26%), (19%). Increased chlorophyll index stomatal conductance (16%) GR24-applied plants results improved efficiency lycopersicum. Our add existing knowledge relatively new function SLs stress, particularly plants.