Crosstalk Among Phytohormone Signaling Pathways During Abiotic Stress

Jogawat, Abhimanyu

doi:10.1002/9781119463665.ch11

Cited by 18 publications

(7 citation statements)

References 84 publications

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“…Along with stimulating cell elongation and division, GA signaling and its crosstalk with other phytohormone signaling lead to the activation of stress-responsive genes required for developing endurance to stresses, including drought (Colebrook et al, 2014;Jogawat, 2019b).…”

Section: Role Of Gibberellins In Drought Stressmentioning

confidence: 99%

“…Besides growth regulation, JA and its crosstalk with other phytohormones regulate biotic and abiotic stress (including drought) responses in plants (Jogawat, 2019b;Santino et al, 2013). JA-responsive genes such as WRKYs, MYBs, MYCs, JA-induced ERFs play a crucial role in combating abiotic or biotic stress (Ruan et al, 2019).…”

Section: Role Of Jasmonates In Drought Stressmentioning

confidence: 99%

“…Also, the pepper JA biosynthesis gene lipoxygenase (Loake & Grant, 2007). SA pathway crosstalk with ABA, JA, and ET pathways is crucial for regulating plant growth and stress responses (Jogawat, 2019b;Yang et al, 2015). Endogenous SA is required to detoxify ROS induced by drought stress.…”

Section: Jasmonates Pathway Engineeringmentioning

confidence: 99%

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Crosstalk between phytohormones and secondary metabolites in the drought stress tolerance of crop plants: A review

Jogawat

Yadav

Chhaya

et al. 2021

Physiologia Plantarum

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208

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Drought stress negatively affects crop performance and weakens global food security. It triggers the activation of downstream pathways, mainly through phytohormones homeostasis and their signaling networks, which further initiate the biosynthesis of secondary metabolites (SMs). Roots sense drought stress, the signal travels to the above-ground tissues to induce systemic phytohormones signaling. The systemic signals further trigger the biosynthesis of SMs and stomatal closure to prevent water loss. SMs primarily scavenge reactive oxygen species (ROS) to protect plants from lipid peroxidation and also perform additional defense-related functions.Moreover, drought-induced volatile SMs can alert the plant tissues to perform drought stress mitigating functions in plants. Other phytohormone-induced stress responses include cell wall and cuticle thickening, root and leaf morphology alteration, and anatomical changes of roots, stems, and leaves, which in turn minimize the oxidative stress, water loss, and other adverse effects of drought. Exogenous applications of phytohormones and genetic engineering of phytohormones signaling and biosynthesis pathways mitigate the drought stress effects. Direct modulation of the SMs biosynthetic pathway genes or indirect via phytohormones' regulation provides drought tolerance. Thus, phytohormones and SMs play key roles in plant development under the drought stress environment in crop plants. | INTRODUCTIONA large segment of the population is going to face food scarcity due to climate change and the gradually decreasing arable land area. Plants are confronted to a variable environment while growing from seedling to mature plant. Different abiotic and biotic stresses affect plant growth and development (Cramer et al., 2011;Fujita et al., 2006;Tuteja & Sopory, 2008). Abiotic stress includes drought, submergence, osmotic stress, salinity stress, oxidative stress, ultra-violet irradiation, wounding, and nutrient depletion. The extremity of optimum factors such as high temperature or low temperature and freezing-thawing is also included in abiotic stresses. Biotic stresses include viruses, bacteria, fungi, algae, worms, nematodes, insects, herbivores, and parasitic plants. Plants have to combat these stressors due to their sessile lifestyle (Cramer et al., 2011;Fujita et al., 2006). More than 50% reduction in average yields of major cereal crops has been reported because of various abiotic stresses. Drought is one of the most important abiotic stresses that negatively influence plant performance and causes harsh effects on biomass and yield (Fahad et al., 2017). A

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Section: Role Of Gibberellins In Drought Stressmentioning

confidence: 99%

Section: Role Of Jasmonates In Drought Stressmentioning

confidence: 99%

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Crosstalk between phytohormones and secondary metabolites in the drought stress tolerance of crop plants: A review

Jogawat

Yadav

Chhaya

et al. 2021

Physiologia Plantarum

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208

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“…Phytohormones allow coordination of the biosynthesis of defense compounds such as flavonoids during abiotic stress response [169] (Figure 3). The main phytohormones involved in abiotic stress responses are auxins, abscisic acid (ABA), salicylic acid (SA), jasmonic acid (JA) and ethylene (ET) [170].…”

Section: Flavonols As Indirect Growth Regulatorsmentioning

confidence: 99%

Plant Flavonoids in Mediterranean Species: A Focus on Flavonols as Protective Metabolites under Climate Stress

Laoué

Fernandez

Ormeño

2022

Plants

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Flavonoids are specialized metabolites largely widespread in plants where they play numerous roles including defense and signaling under stress conditions. These compounds encompass several chemical subgroups such as flavonols which are one the most represented classes. The most studied flavonols are kaempferol, quercetin and myricetin to which research attributes antioxidative properties and a potential role in UV-defense through UV-screening mechanisms making them critical for plant adaptation to climate change. Despite the great interest in flavonol functions in the last decades, some functional aspects remain under debate. This review summarizes the importance of flavonoids in plant defense against climate stressors and as signal molecules with a focus on flavonols in Mediterranean plant species. The review emphasizes the relationship between flavonol location (at the organ, tissue and cellular scales) and their function as defense metabolites against climate-related stresses. It also provides evidence that biosynthesis of flavonols, or flavonoids as a whole, could be a crucial process allowing plants to adapt to climate change, especially in the Mediterranean area which is considered as one of the most sensitive regions to climate change over the globe.

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“…Coronatine, unlike MeJA, promotes water uptake by directly binding to loop E of ZmPIP2;5 Jasmonic acid and its crosstalk with other phytohormones regulate drought stress responses in plants (Santino et al, 2013;Jogawat, 2019). For instance, crosstalk between the abscisic acid (ABA) receptor PYRABACTIN RESISTANCE1-LIKE (PYL) and the JAZ (JASMONATE-ZIM-DOMAIN PROTEIN)-MYC2 complex coordinates the balance between initiating stress tolerance and reprogramming plant metabolism and growth (Yang et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Coronatine promotes maize water uptake by directly binding to the aquaporin ZmPIP2;5 and enhancing its activity

Wang

et al. 2023

JIPB

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Water uptake is crucial for crop growth and development and drought stress tolerance. The water channel aquaporins (AQP) play important roles in plant water uptake. Here, we discovered that a jasmonic acid analog, coronatine (COR), enhanced maize (Zea mays) root water uptake capacity under artificial water deficiency conditions. COR treatment induced the expression of the AQP gene Plasma membrane intrinsic protein 2;5 (ZmPIP2;5). In vivo and in vitro experiments indicated that COR also directly acts on ZmPIP2;5 to improve water uptake in maize and Xenopus oocytes. The leaf water potential and hydraulic conductivity of roots growing under hyperosmotic conditions were higher in ZmPIP2;5‐overexpression lines and lower in the zmpip2;5 knockout mutant, compared to wild‐type plants. Based on a comparison between ZmPIP2;5 and other PIP2s, we predicted that COR may bind to the functional site in loop E of ZmPIP2;5. We confirmed this prediction by surface plasmon resonance technology and a microscale thermophoresis assay, and showed that deleting the binding motif greatly reduced COR binding. We identified the N241 residue as the COR‐specific binding site, which may activate the channel of the AQP tetramer and increase water transport activity, which may facilitate water uptake under hyperosmotic stress.

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Crosstalk Among Phytohormone Signaling Pathways During Abiotic Stress

Cited by 18 publications

References 84 publications

Crosstalk between phytohormones and secondary metabolites in the drought stress tolerance of crop plants: A review

Crosstalk between phytohormones and secondary metabolites in the drought stress tolerance of crop plants: A review

Plant Flavonoids in Mediterranean Species: A Focus on Flavonols as Protective Metabolites under Climate Stress

Coronatine promotes maize water uptake by directly binding to the aquaporin ZmPIP2;5 and enhancing its activity

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