Salicylic Acid: A Novel Plant Growth Regulator – Role in Physiological Processes and Abiotic Stresses Under Changing Environments

Salicylic acid confers salt tolerance in potato plants by improving water relations, gaseous exchange, antioxidant activities and osmoregulation

“…Moreover, SA had an affinity to bind with antioxidant enzymes (CAT, peroxidases etc. ), which are involved in redox homeostasis and ROS metabolism, and consequently strengthened the defense response of plants . Also, SOD changed superoxide into H 2 O 2 , which was converted into water by CAT and various peroxidases (POD) through the Halliwell–Asada pathway .…”

“…Redox homeostasis was maintained by SA through a balance between reactive oxygen species (ROS) generation and their detoxification, by activating adaptive response and accumulation of antioxidant enzymes, e.g. SOD, CAT, POD, and osmolytes like proline . Similarly, in the present study SA helped in sustaining redox homeostasis, which was established by correlation among various investigated variables (Fig.…”

“…Recent studies suggest that SA is involved in abiotic stress signal transduction, initiates antisense programming, removes stress and consequently accelerates plant growth and development . However, SA effects were concentration and cultivar dependent .…”

“…A). Also, SA regulated the antioxidant system, scavenged ROS and thereby improved the functioning of the photosynthetic apparatus . Furthermore, SA enhanced growth hormones (abscisic acid (ABA), indole‐3‐acetic acid (IAA) and cytokinin) because IAA and cytokinin maintained cell division in the apical root meristem, while ABA biosynthesized various anti‐stress proteins, strengthened the antioxidant enzyme system, reduced ROS production, maintained membrane integrity and regulated g s .…”

“…lipids, proteins and nucleic acids) and altering redox homeostasis . Oxidative stress was alleviated by suitable SA dose and application . It was observed that SA application during salt stress first induced medium stress by triggering H 2 O 2 production, which in turn enhanced generation of enzymatic (e.g.…”