Roles of abscisic acid and auxin in plants during drought: A molecular point of view

Sharma, Anket; Gupta, Aarti; Ramakrishnan, Muthusamy; Ha, Chien Van; Zheng, Bingsong; Bhardwaj, Mamta; Tran, Lam-Son Phan

doi:10.1016/j.plaphy.2023.108129

Cited by 6 publications

(4 citation statements)

References 42 publications

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“…4−6 When there is a water shortage, the endogenous ABA levels increase rapidly, activating the ABA signaling pathway, which leads to stomatal closure and reduced water loss through transpiration. 7,8 Additionally, this activation induces the expression of various stress-responsive genes involved in processes such as osmotic regulation, dehydration tolerance, and the management of reactive oxygen species. 9−12 Researches indicate that applying exogenous ABA significantly improves crop productivity during drought conditions.…”

Section: ■ Introductionmentioning

confidence: 99%

“…One approach to alleviate the impact of drought on crop yields involves using chemicals to reduce transpiration from the leaf surface during the early stages of plant exposure to drought stress. , The goal is to increase the plant’s water reserves for normal growth and development in the future. Specific receptors for abscisic acid (ABA), a plant hormone (Figure ), have emerged as promising targets for these antitranspirants. − When there is a water shortage, the endogenous ABA levels increase rapidly, activating the ABA signaling pathway, which leads to stomatal closure and reduced water loss through transpiration. , Additionally, this activation induces the expression of various stress-responsive genes involved in processes such as osmotic regulation, dehydration tolerance, and the management of reactive oxygen species. − Researches indicate that applying exogenous ABA significantly improves crop productivity during drought conditions. , However, the practical use of natural ABA in agriculture is limited due to several main drawbacks associated with its use as a plant growth regulator. These drawbacks include the complex structure of natural ABA, which leads to high production costs and challenges for large-scale industrial production, susceptibility to isomerization and deactivation under light conditions, and sensitivity to metabolic deactivation within the plant’s physiological system .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, Plant Growth Regulatory Activity, and Transcriptome Analysis of Novel Opabactin Analogs

Tang,

Chen,

et al. 2024

J. Agric. Food Chem.

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Abscisic acid (ABA), a phytohormone, and its analogs have been found to enhance plant resistance to various biotic and abiotic stresses, particularly drought, by activating the ABA signaling pathway. This study used a combination of structuredirected design and molecular docking screening methods to synthesize a novel series of opabactin (OP) analogs. Among them, compounds 4a−4d and 5a showed comparable or superior activity to OP in bioassays, including seed germination and seedling growth inhibition in A. thaliana and rice, stomatal closure, and drought resistance in wheat and soybean. Further transcriptome analysis revealed distinct mechanisms of action between compound 4c and iso-PhABA in enhancing drought tolerance in A. thaliana. These findings highlight the application prospect of 4c and its analogs in agricultural cultivation, particularly in drought resistance. Additionally, they provide new insights into the mechanisms by which different ABA receptor agonists enhance drought resistance.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis, Plant Growth Regulatory Activity, and Transcriptome Analysis of Novel Opabactin Analogs

Tang,

Chen,

et al. 2024

J. Agric. Food Chem.

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“…ABA and auxin are critical in response to drought stress. Under drought conditions, ABA content in plant leaves increases and stomatal conductance is inhibited, which results in a decreased transpiration rate and prevents excessive water loss [29].…”

Section: Introductionmentioning

confidence: 99%

Transcriptomic and Metabolomic Analyses Reveal the Response to Short-Term Drought Stress in Bread Wheat (Triticum aestivum L.)

Fu,

Liu,

et al. 2024

Agronomy

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Drought stress, a major abiotic stress, significantly affects wheat (Triticum aestivum L.) production globally. To identify genes and metabolic pathways crucial for responding to short-term drought stress, we conducted transcriptomic and metabolomic analyses of winter wheat cultivar Jimai 418 at four developmental stages: jointing (GS31), booting (GS45), anthesis (GS65), and 8 days after anthesis (DAA8). Transcriptomic analysis identified 14,232 differentially expressed genes (DEGs) under drought stress compared to the control. Specifically, 1387, 4573, 7380, and 892 DEGs were identified at the four developmental stages, respectively. Enriched pathways associated with these DEGs included plant hormone signal transduction, mitogen-activated protein kinase (MAPK) signaling, galactose metabolism, and starch and sucrose metabolism. Totals of 222, 633, 358, and 38 differentially accumulated metabolites (DAMs) were identified at the four stages, respectively. Correlation analysis of both datasets revealed DEGs and DAMs associated with plant hormone signal transduction, arginine and proline metabolism, ABC transporters, and amino acid biosynthesis. These findings offer significant insights into Jimai 418’s molecular response to short-term drought stress. The identified DEGs, DAMs, and enriched pathways contribute to our understanding of wheat drought tolerance. This research will facilitate further investigations into drought tolerance mechanisms and guide the breeding of wheat varieties with enhanced drought resistance.

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“…Plants produce antioxidants, induce primary or secondary metabolites, and undergo physiological and metabolic responses to stressors as their mechanisms to tolerate drought stress [ 9 , 10 , 11 , 12 ]. Muhammad showed that plants can cope with drought-induced damage by maintaining their water balance through stomatal transpiration [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Salicylic Acid Modulates the Osmotic System and Photosynthesis Rate to Enhance the Drought Tolerance of Toona ciliata

Gao,

Liu,

Liu

et al. 2023

Plants

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Toona ciliata M. Roem. is a valuable and fast-growing timber species which is found in subtropical regions; however, drought severely affects its growth and physiology. Although the exogenous application of salicylic acid (SA) has been proven to enhance plant drought tolerance by regulating the osmotic system and photosynthesis rate, the physiological processes involved in the regulation of drought tolerance by SA in various plants differ. Therefore, drought mitigation techniques tailored for T. ciliata should be explored or developed for the sustainable development of the timber industry. We selected 2-year-old T. ciliata seedlings for a potting experiment, set the soil moisture at 45%, and subjected some of the T. ciliata seedlings to a moderate drought (MD) treatment; to others, 0.5 mmol/L exogenous SA (MD + SA) was applied as a mitigation test, and we also conducted a control using a normal water supply at 70% soil moisture (CK). Our aim was to investigate the mitigating effects of exogenous SA on the growth condition, osmotic system, and photosynthesis rate of T. ciliata under drought stress conditions. OPLS–VIP was used to analyze the main physiological factors that enable exogenous SA to alleviate drought-induced injury in T. ciliata. The results indicated that exogenous SA application increased the growth of the ground diameter, plant height, and leaf blades and enhanced the drought tolerance of the T. ciliata seedlings by maintaining the balance of their osmotic systems, improving their gas exchange parameters, and restoring the activity of their PSII reaction centers. The seven major physiological factors that enabled exogenous SA to mitigate drought-induced injury in the T. ciliata seedlings were the soluble proteins (Sp), net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), stomatal opening window (Sow), activity of the photosystem II reaction center (ΦPSII), and electron transfer rate (ETR). Of these, Sp was the most dominant factor. There was a synergistic effect between the osmotic system and the photosynthetic regulation of drought injury in the T. ciliata seedlings. Overall, our study confirms that exogenous SA enhances the drought tolerance of T. ciliata by modulating the osmotic system and photosynthesis rate.

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Roles of abscisic acid and auxin in plants during drought: A molecular point of view

Cited by 6 publications

References 42 publications

Synthesis, Plant Growth Regulatory Activity, and Transcriptome Analysis of Novel Opabactin Analogs

Synthesis, Plant Growth Regulatory Activity, and Transcriptome Analysis of Novel Opabactin Analogs

Transcriptomic and Metabolomic Analyses Reveal the Response to Short-Term Drought Stress in Bread Wheat (Triticum aestivum L.)

Salicylic Acid Modulates the Osmotic System and Photosynthesis Rate to Enhance the Drought Tolerance of Toona ciliata

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