Phytohormones Mediated Modulation of Abiotic Stress Tolerance and Potential Crosstalk in Horticultural Crops

Altaf, Muhammad Ahsan; Shahid, Rabia; Kumar, Ravinder; Altaf, Muhammad Mohsin; Kumar, Awadhesh; Khan, Latif Ullah; Saqib, Muhammad; Nawaz, Muhammad Azher; Saddiq, Bushra; Bahadur, Saraj; Tiwari, Rahul Kumar; Lal, Milan Kumar; Naz, Safina

doi:10.1007/s00344-022-10812-0

Cited by 26 publications

(3 citation statements)

References 281 publications

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“…Phytohormones are important biomolecules that regulate normal physiological activities and ensure better growth and development of plants [135]. These biomolecules provide tolerance against several abiotic stresses via complex signaling cascades, from receiving a signal to activation of several stress-specific genes [136]. Phytohormones provide a better microenvironment for plant growth and development by establishing proper source and sink relationships and resource partitioning to different organs based on their need to acclimatize under adverse environmental conditions [137].…”

Section: Crosstalk Between Glycine Betaine and Phytohormonesmentioning

confidence: 99%

Glycine Betaine

Singh

Choudhary

2022

J. Pharm. Nutr. Sci.

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Abiotic stresses like temperature, water, salinity, ultraviolet (UV) radiations, heavy metals, etc., affect plants’ growth and yield. Despite these constraints, plants produce a variety of metabolites to maintain their survival. Primary metabolites, produced through crucial metabolic processes, are essential for plants survival. Additionally, secondary metabolites (SMs) are synthesized from primary metabolites and are mainly used as a defensive mechanism and a means of interacting with unfavorable environmental conditions. In addition to their defensive function in plants, SMs are significant in the pharmaceutical industry. Glycine betaine (GB) is a quaternary ammonium compound that belongs to a class of SMs, present in plants, animals, and microbes. It functions as a compatible solute and reflects potential bioactivity against various abiotic stresses like salinity, water, heat, heavy metals, UV radiations, etc. Due to high solubility and low viscosity, its accumulation is commonly observed in chloroplasts and plastids. The accumulation level generally depends on plant species, growth stage, exposure duration, and stress's nature. GB reduces oxidative stress and prevents the damaging of photosystems and other biomolecules under stressful conditions. It is important for maintaining the water potential and osmotic pressure of cells and hence functions as a potent osmolyte under salinity stress. Excessive production of ROS during temperature stress is responsible for damage to oxygen-evolving complexes, electron transport chains, and photosystems. In order to protect plants from these damages, GB activates the genes responsible for synthesizing heat shock proteins, glycoproteins, and antioxidants via various signaling pathways. GB alleviates the effect of water stress by maintaining the function of rubisco and calcium ion ATPase activity via crosstalk with Abscisic acid (ABA) and ethylene. GB supports the proper functioning of the ascorbate-glutathione cycle, superoxide dismutase, catalase, peroxidase, and ascorbate peroxidase (antioxidative enzymes) to overcome various stresses. Phytohormones like salicylic acid (SA), jasmonic acid (JA), ABA, ethylene, and polyamines (PAS) coordinate well with GB via different signaling pathways to ensure plant protection under various abiotic stresses. The potential bioactivity of GB against various abiotic stresses in plants has been summarized in this review.

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Section: Crosstalk Between Glycine Betaine and Phytohormonesmentioning

confidence: 99%

Glycine Betaine

Singh

Choudhary

2022

J. Pharm. Nutr. Sci.

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“…Phytohormones are considered plant-protecting hormones under abiotic stress conditions. Different phytohormones are well-known management strategies, which act as stress-relieving bioactive compounds in vegetable crops (Fahad et al, 2015;Altaf et al, 2022a). The exogenous spray of numerous phytohormones can reduce the drought and salinity stresses and also improve the plant defense mechanism focusing on sustainable production.…”

Section: Introductionmentioning

confidence: 99%

Phytohormones unlocking their potential role in tolerance of vegetable crops under drought and salinity stresses

Pang¹

2023

Front. Plant Sci.

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Globally, abiotic stresses are drastically reducing the productivity of vegetable crops. Among abiotic stresses, drought and salinity are more challenging constraints for the sustainable production of vegetables. A great variety of vegetables are facing dry and hot summer spells, poor water availability, and higher salinity mainly due to irrigation with brackish water. Vegetables are considered higher water-dependent crops, requiring water for proper growth and yield. Drought and salinity impair plant metabolism. The disruption in plant metabolism leads to a reduction in growth, developmental processes, and ultimately crop yield. Appropriate management measures are needed to cope with the adverse effects of drought and salinity. Different agronomic and molecular approaches contributed to improving tolerance. Therefore, the present review significantly explores the impact of phytohormones on vegetable crops under drought and salinity stresses. Phytohormones (salicylic acid, melatonin, jasmonates, Brassinosteroids, ascorbic acid, and numerous others) can be sprayed for improvement of plant growth, yield, and photosynthetic pigments by modulation of physiological and biochemical processes. In this manner, these phytohormones should be explored for sustainable production of vegetable crops growing under abiotic stress conditions.

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“…Oxidative stress imposed by metals also activates a signaling pathway that results in the synthesis of particular secondary metabolites in plants [ 8 , 9 ]. In addition, several studies reported that phytohormones (brassinosteroids, jasmonic acid, salicylic acid, auxin, gibberellins, cytokinin, abscisic acid and ethylene) perform a potential role as signaling molecules and also coordinate different signal transduction pathways in response to abiotic stresses [ 10 ]. Choudhary and Agrawal [ 11 ] reported that in a leguminous plant Vigna radiata , jasmonic acid and salicylic acid increased under UV-B radiation.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet-B and Heavy Metal-Induced Regulation of Secondary Metabolites in Medicinal Plants: A Review

Pandey

Agrawal

2023

Metabolites

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Despite a rich history and economic importance, the potential of medicinal plants has not been fully explored under different abiotic stress conditions. Penetration of UV-B radiation and contamination of heavy metals are two important environmental stress for plants with remarkable influence on the defense-related and pharmaceutically important secondary metabolites of medicinal plants. UV-B and heavy metal contamination may become a critical issue that either positively or negatively affects the quality and quantity of secondary metabolites. Such effects may result from changes in the expression level of genes that encode the corresponding enzymes or the inactivation and/or stimulation of specific enzymes involved in the different biosynthetic pathways of the secondary metabolites. Therefore, a comprehensive study of the impact of UV-B and heavy metals individually and in combination on the biosynthesis and accumulation of secondary metabolites in medicinal plants is discussed in the present review.

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Phytohormones Mediated Modulation of Abiotic Stress Tolerance and Potential Crosstalk in Horticultural Crops

Cited by 26 publications

References 281 publications

Glycine Betaine

Glycine Betaine

Phytohormones unlocking their potential role in tolerance of vegetable crops under drought and salinity stresses

Ultraviolet-B and Heavy Metal-Induced Regulation of Secondary Metabolites in Medicinal Plants: A Review

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