Uncovering the mechanisms of salicylic acid-mediated abiotic stress tolerance in horticultural crops

Abstract

Salicylic acid (SA) has been recognized as a promising molecule for improving abiotic stress tolerance in plants due to its ability to enhance antioxidant defense system, and promote root architecture system. Recent research has focused on uncovering the mechanisms by which SA confers abiotic stress tolerance in horticultural crops. SA has been shown to act as a signaling molecule that triggers various physiological and morphological responses in plants. SA regulates the production of reactive oxygen species (ROS). Moreover, it can also act as signaling molecule that regulate the expression of stress-responsive genes. SA can directly interact with various hormones, proteins and enzymes involved in abiotic stress tolerance. SA regulates the antioxidant enzymes activities that scavenge toxic ROS, thereby reducing oxidative damage in plants. SA can also activate protein kinases that phosphorylate and activate transcription factors involved in stress responses. Understanding these mechanisms is essential for developing effective strategies to improve crop resilience in the face of changing environmental conditions. Current information provides valuable insights for farmers and plant researchers, offering new strategies to enhance crop resilience and productivity in the face of environmental challenges. By harnessing the power of SA and its signaling pathways, farmers can develop more effective stress management techniques and optimize crop performance. Plant researchers can also explore innovative approaches to breed or engineer crops with enhanced stress tolerance, thereby contributing to sustainable agriculture and food security.

Manganese with Salicylic Acid Optimize the Growth Dynamics and Quality Potential in Indian Mustard (Brassica juncea L.)

“…It is well recognized that SA functions as a signaling molecule in plants, inducing a range of physiological and morphological reactions. It controls the generation of reactive oxygen species (ROS), which are essential to the metabolic activities of plants 31 . In addition, the combination of higher levels of salicylic acid and Mn improves crop growth by regulating different physiological processes in plants, including thermogenesis, ower induction, nutrient uptake, ethylene production, stomatal movement, photosynthesis, and antioxidative enzyme activity 32 .…”

“…The upregulation results in an elevated production of chlorophyll a, b, and chlorophyll ab concentrations in plant tissues 58 . By promoting defensive photosynthetic activities, SA regulates the amount of chlorophyll and carotenoid content, ribulose-1,5-bisphosphate carboxylase/oxygenase activity, stomatal conductance, and carbon dioxide (CO 2 ) absorption 31 . In addition, salicylic acid has antioxidant properties that allow it to remove reactive oxygen species (ROS) produced during photosynthesis.…”

Genome-wide identification, stress- and hormone-responsive expression characteristics, and regulatory pattern analysis of Scutellaria baicalensis SbSPLs

“…SA and ABA are important signaling molecules for plant physiological and morphological responses. They can regulate ROS levels and activate the expression of TFs and resistance genes during biotic and abiotic stress (Sah et al 2016 ; Yang et al 2023 ). SbSPLs differentially responded to SA; the expression levels of SbSPL1/3/4/5/7/10/12/13/14 were significantly downregulated at 3 HAT, while the expression levels of SbSPL6/9 and SbSPL4/8/11 were upregulated and reached a peak at 3 HAT and 24 HAT, respectively (Fig.…”

The Mechanism of Exogenous Salicylic Acid and 6-Benzylaminopurine Regulating the Elongation of Maize Mesocotyl

“…The effect of exogenous SA on plants is related to the application method, action time and plant development stage, and the effective concentration varies from species to species [ 28 , 29 ]. In this study, different concentrations of exogenous SA were applied to different maize inbred lines with two sowing depths.…”