Adaptation of plants to changing climates is always challenging. Multiple biotic and abiotic stress factors significantly influence plant growth and productivity globally. These stress factors induce alterations in primary metabolism and lead to oxidative stress, osmotic imbalance, lipid peroxidation, and cellular injury in plants. Plant stresses trigger the production of first messengers such as hormones (abscisic acid, jasmonic acid, salicylic acid, brassinosteroids, indole-3-acetic acid, cytokinins, ethylene, gibberellic acid, and strigolactones), polyamines (putrescine, spermidine, and spermine), plant and second messengers (ROS, Ca2+, nitric oxide, and lipid molecules). The multiple stress-induced hormones and biostimulants (seaweed, plant extracts, chitosan, microbes, etc.) lead to the regulation of plant growth, root-shoot induction, plant fitness, and adaptation to numerous external stimuli. Additionally, the complex network of these molecules and their integrating responses to abiotic and biotic stresses are crucial for regulating stress signals, gene expression machinery, and characterizing stress-modified metabolic pathways. However, crosstalk between plant hormones (PHs) and biostimulants, their signaling in responses to multiple stresses, along with physiological and molecular insights on plant stress responses with adaption has not yet been well established.
Extensive studies have been conducted to explore stress-induced hormonal regulation in plants. Plant hormones have been found to interact with plant development, osmolyte signaling and metabolism, ROS regulation, Ca2+ dependent photosynthesis, and stress adaptation. Regulations of these pathways are associated with single or group hormonal mechanisms/pathways in plants. However, it remains to explore new insights into their interactions, stress signaling, regulation of ROS production, redox-homeostasis, antioxidant defense, metabolite synthesis, regulation of plant senescence, and plant adaptation in response to multiple stress factors. In this context, it requires further exploration of how hormones and biostimulants are involved in these mechanisms, which help to enhance plant fitness, stress adaptation, and tolerance against biotic and abiotic stresses.
We welcome updated research findings on PHs and biostimulants interactions in stress tolerance in plants. We appreciate high-quality research articles, reviews, and mini-reviews on the following areas (but not limited to):
• Identification of hormones and biostimulants mediated new insights on stress tolerance in plants.
• Regulatory mechanisms of ROS, hormones, and biostimulants involved in biotic and abiotic stresses in plants.
• Advancement of multi-omics approaches toward hormones and biostimulants involved in crop plant stress adaptation.
• Cross talk between PHs, biostimulants, and PAs in plants under abiotic and biotic stresses
• New and promising techniques/approaches linked to hormones and biostimulants-mediated pathways to enhance biotic and abiotic stress resistance/tolerance in plants
• Contributions of hormones and biostimulants involving novel pathways and genes in modulating abiotic stress tolerance in plants.
• Metabolite engineering and genome editing for improving stress tolerance in plants.
Adaptation of plants to changing climates is always challenging. Multiple biotic and abiotic stress factors significantly influence plant growth and productivity globally. These stress factors induce alterations in primary metabolism and lead to oxidative stress, osmotic imbalance, lipid peroxidation, and cellular injury in plants. Plant stresses trigger the production of first messengers such as hormones (abscisic acid, jasmonic acid, salicylic acid, brassinosteroids, indole-3-acetic acid, cytokinins, ethylene, gibberellic acid, and strigolactones), polyamines (putrescine, spermidine, and spermine), plant and second messengers (ROS, Ca2+, nitric oxide, and lipid molecules). The multiple stress-induced hormones and biostimulants (seaweed, plant extracts, chitosan, microbes, etc.) lead to the regulation of plant growth, root-shoot induction, plant fitness, and adaptation to numerous external stimuli. Additionally, the complex network of these molecules and their integrating responses to abiotic and biotic stresses are crucial for regulating stress signals, gene expression machinery, and characterizing stress-modified metabolic pathways. However, crosstalk between plant hormones (PHs) and biostimulants, their signaling in responses to multiple stresses, along with physiological and molecular insights on plant stress responses with adaption has not yet been well established.
Extensive studies have been conducted to explore stress-induced hormonal regulation in plants. Plant hormones have been found to interact with plant development, osmolyte signaling and metabolism, ROS regulation, Ca2+ dependent photosynthesis, and stress adaptation. Regulations of these pathways are associated with single or group hormonal mechanisms/pathways in plants. However, it remains to explore new insights into their interactions, stress signaling, regulation of ROS production, redox-homeostasis, antioxidant defense, metabolite synthesis, regulation of plant senescence, and plant adaptation in response to multiple stress factors. In this context, it requires further exploration of how hormones and biostimulants are involved in these mechanisms, which help to enhance plant fitness, stress adaptation, and tolerance against biotic and abiotic stresses.
We welcome updated research findings on PHs and biostimulants interactions in stress tolerance in plants. We appreciate high-quality research articles, reviews, and mini-reviews on the following areas (but not limited to):
• Identification of hormones and biostimulants mediated new insights on stress tolerance in plants.
• Regulatory mechanisms of ROS, hormones, and biostimulants involved in biotic and abiotic stresses in plants.
• Advancement of multi-omics approaches toward hormones and biostimulants involved in crop plant stress adaptation.
• Cross talk between PHs, biostimulants, and PAs in plants under abiotic and biotic stresses
• New and promising techniques/approaches linked to hormones and biostimulants-mediated pathways to enhance biotic and abiotic stress resistance/tolerance in plants
• Contributions of hormones and biostimulants involving novel pathways and genes in modulating abiotic stress tolerance in plants.
• Metabolite engineering and genome editing for improving stress tolerance in plants.