scholarly journals Implications of Abscisic Acid in the Drought Stress Tolerance of Plants

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1323 ◽  
Author(s):  
Shahid Ali ◽  
Kashif Hayat ◽  
Amjad Iqbal ◽  
Linan Xie
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Stress Tolerance ◽  
Signaling Pathways ◽  
Environmental Changes ◽  
Stomatal Closure ◽  
Mitigation Strategies ◽  
Stress Signals ◽  
Post Transcriptional Regulation ◽  
Aba Biosynthesis

Drought is a severe environmental constraint, which significantly affects plant growth, productivity, and quality. Plants have developed specific mechanisms that perceive the stress signals and respond to external environmental changes via different mitigation strategies. Abscisic acid (ABA), being one of the phytohormones, serves as an important signaling mediator for plants’ adaptive response to a variety of environmental stresses. ABA triggers many physiological processes, including bud dormancy, seed germination, stomatal closure, and transcriptional and post-transcriptional regulation of stress-responsive gene expression. The site of its biosynthesis and action must be clarified to understand the signaling network of ABA. Various studies have documented multiple sites for ABA biosynthesis, their transporter proteins in the plasma membrane, and several components of ABA-dependent signaling pathways, suggesting that the ABA response to external stresses is a complex networking mechanism. Knowing about stress signals and responses will increase our ability to enhance crop stress tolerance through the use of various advanced techniques. This review will elaborate on the ABA biosynthesis, transportation, and signaling pathways at the molecular level in response to drought stress, which will add a new insight for future studies.

scholarly journals Overexpression of the Trehalase Gene AtTRE1 Leads to Increased Drought Stress Tolerance in Arabidopsis and Is Involved in Abscisic Acid-Induced Stomatal Closure

2013 ◽  
Vol 161 (3) ◽  
pp. 1158-1171 ◽  
Author(s):  
Hilde Van Houtte ◽  
Lies Vandesteene ◽  
Lorena López-Galvis ◽  
Liesbeth Lemmens ◽  
Ewaut Kissel ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Stress Tolerance ◽  
Stomatal Closure ◽  
Drought Stress Tolerance

scholarly journals Below versus above Ground Plant Sources of Abscisic Acid (ABA) at the Heart of Tropical Forest Response to Warming

2018 ◽  
Vol 19 (7) ◽  
pp. 2023 ◽  
Author(s):  
Israel Sampaio Filho ◽  
Kolby Jardine ◽  
Rosilena de Oliveira ◽  
Bruno Gimenez ◽  
Leticia Cobello ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Large Fraction ◽  
Stomatal Closure ◽  
Antioxidant Systems ◽  
Climate Change Scenarios ◽  
Natural Forests ◽  
Defense Gene Expression ◽  
Modeling Framework ◽  
Aba Biosynthesis

Warming surface temperatures and increasing frequency and duration of widespread droughts threaten the health of natural forests and agricultural crops. High temperatures (HT) and intense droughts can lead to the excessive plant water loss and the accumulation of reactive oxygen species (ROS) resulting in extensive physical and oxidative damage to sensitive plant components including photosynthetic membranes. ROS signaling is tightly integrated with signaling mechanisms of the potent phytohormone abscisic acid (ABA), which stimulates stomatal closure leading to a reduction in transpiration and net photosynthesis, alters hydraulic conductivities, and activates defense gene expression including antioxidant systems. While generally assumed to be produced in roots and transported to shoots following drought stress, recent evidence suggests that a large fraction of plant ABA is produced in leaves via the isoprenoid pathway. Thus, through stomatal regulation and stress signaling which alters water and carbon fluxes, we highlight the fact that ABA lies at the heart of the Carbon-Water-ROS Nexus of plant response to HT and drought stress. We discuss the current state of knowledge of ABA biosynthesis, transport, and degradation and the role of ABA and other isoprenoids in the oxidative stress response. We discuss potential variations in ABA production and stomatal sensitivity among different plant functional types including isohydric/anisohydric and pioneer/climax tree species. We describe experiments that would demonstrate the possibility of a direct energetic and carbon link between leaf ABA biosynthesis and photosynthesis, and discuss the potential for a positive feedback between leaf warming and enhanced ABA production together with reduced stomatal conductance and transpiration. Finally, we propose a new modeling framework to capture these interactions. We conclude by discussing the importance of ABA in diverse tropical ecosystems through increases in the thermotolerance of photosynthesis to drought and heat stress, and the global importance of these mechanisms to carbon and water cycling under climate change scenarios.

scholarly journals miR2105 regulates ABA biosynthesis via OsbZIP86-OsNCED3 module to contribute to drought tolerance in rice

2021 ◽  
Author(s):  
Weiwei Gao ◽  
Mingkang Li ◽  
Songguang Yang ◽  
Chunzhi Gao ◽  
Yan Su ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Transgenic Rice ◽  
Crucial Role ◽  
Agronomic Traits ◽  
Stomatal Closure ◽  
Plant Tolerance ◽  
Rice Plants ◽  
Transgenic Rice Plants ◽  
Aba Biosynthesis

AbstractInduced abscisic acid (ABA) biosynthesis plays an important role in plant tolerance to abiotic stresses, including drought, cold and salinity. However, regulation pathway of the ABA biosynthesis in response to stresses is unclear. Here, we identified a rice miRNA, osa-miR2105 (miR2105), which plays a crucial role in ABA biosynthesis under drought stress. Analysis of expression, transgenic rice and cleavage site showed that OsbZIP86 is a target gene of miR2105. Subcellular localization and luciferase activity assays showed that OsbZIP86 is a nuclear transcription factor. In vivo and in vitro analyses showed that OsbZIP86 directly binds to the promoter of OsNCED3, and interacts with OsSAPK10, resulting in enhanced-expression of OsNCED3. Transgenic rice plants with knock-down of miR2105 or overexpression of OsbZIP86 showed higher ABA content, more tolerance to drought, a lower rate of water loss, more stomatal closure than wild type rice ZH11 under drought stress. These rice plants showed no penalty with respect to agronomic traits under normal conditions. By contrast, transgenic rice plants with miR2105 overexpression, OsbZIP86 downregulation, or OsbZIP86 knockout displayed less tolerance to drought stress and other phenotypes. Collectively, our results show that a regulatory network of ‘miR2105-OsSAPK10/OsbZIP86-OsNCED3’ control ABA biosynthesis in response to drought stress.One-sentence summary‘miR2105-OsbZIP86-OsNCED3’ module plays crucial role in mediating ABA biosynthesis to contribute to drought tolerance with no penalty with respect to agronomic traits under normal conditions.

scholarly journals The Regulatory Domain of SRK2E/OST1/SnRK2.6 Interacts with ABI1 and Integrates Abscisic Acid (ABA) and Osmotic Stress Signals Controlling Stomatal Closure inArabidopsis

2005 ◽  
Vol 281 (8) ◽  
pp. 5310-5318 ◽  
Author(s):  
Riichiro Yoshida ◽  
Taishi Umezawa ◽  
Tsuyoshi Mizoguchi ◽  
Seiji Takahashi ◽  
Fuminori Takahashi ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Osmotic Stress ◽  
Stomatal Closure ◽  
Regulatory Domain ◽  
Stress Signals

scholarly journals Enhancing Arabidopsis Salt and Drought Stress Tolerance by Chemical Priming for Its Abscisic Acid Responses

2005 ◽  
Vol 139 (1) ◽  
pp. 267-274 ◽  
Author(s):  
Gabor Jakab ◽  
Jurriaan Ton ◽  
Victor Flors ◽  
Laurent Zimmerli ◽  
Jean-Pierre Métraux ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Stress Tolerance ◽  
Drought Stress Tolerance ◽  
Salt And Drought Stress ◽  
Chemical Priming

ABA Biosynthesis Gene OsNCED3 Confers Drought Stress Tolerance in Rice

2018 ◽  
Vol 44 (1) ◽  
pp. 24
Author(s):  
Xue-Zhong XU ◽  
Ting WANG ◽  
Wang WAN ◽  
Si-Hui LI ◽  
Guo-Hui ZHU
Keyword(s):  
Drought Stress ◽  
Stress Tolerance ◽  
Drought Stress Tolerance ◽  
Biosynthesis Gene ◽  
Aba Biosynthesis

scholarly journals F-Box Protein DOR Functions As a Novel Inhibitory Factor for Abscisic Acid-Induced Stomatal Closure under Drought Stress in Arabidopsis

2008 ◽  
Vol 148 (4) ◽  
pp. 2121-2133 ◽  
Author(s):  
Yu'e Zhang ◽  
Wenying Xu ◽  
Zhonghui Li ◽  
Xing Wang Deng ◽  
Weihua Wu ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Stomatal Closure ◽  
Inhibitory Factor ◽  
F Box Protein

scholarly journals Arabidopsis thaliana NGATHA1 transcription factor induces ABA biosynthesis by activating NCED3 gene during dehydration stress

2018 ◽  
Vol 115 (47) ◽  
pp. E11178-E11187 ◽  
Author(s):  
Hikaru Sato ◽  
Hironori Takasaki ◽  
Fuminori Takahashi ◽  
Takamasa Suzuki ◽  
Satoshi Iuchi ◽  
...  
Keyword(s):  
Drought Stress ◽  
Stress Responses ◽  
Plant Hormone ◽  
Stomatal Closure ◽  
Transcriptional Regulators ◽  
Dehydration Stress ◽  
Knockout Mutant ◽  
Knockout Mutants ◽  
Aba Biosynthesis ◽  
Single Knockout

The plant hormone abscisic acid (ABA) is accumulated after drought stress and plays critical roles in the responses to drought stress in plants, such as gene regulation, stomatal closure, seed maturation, and dormancy. Although previous reports revealed detailed molecular roles of ABA in stress responses, the factors that contribute to the drought-stress responses—in particular, regulation of ABA accumulation—remain unclear. The enzyme NINE-CIS-EPOXYCAROTENOID DIOXYGENASE 3 (NCED3) is essential for ABA biosynthesis during drought stress, and the NCED3 gene is highly induced by drought stress. In the present study, we isolated NGATHAs (NGAs) as candidate transcriptional regulators of NCED3 through a screen of a plant library harboring the transcription factors fused to a chimeric repressor domain, SRDX. The NGA proteins were directly bound to a cis-element NGA-binding element (NBE) in the 5′ untranslated region (5′ UTR) of the NCED3 promoter and were suggested to be transcriptional activators of NCED3. Among the single-knockout mutants of four NGA family genes, we found that the NGATHA1 (NGA1) knockout mutant was drought-stress-sensitive with a decreased expression level of NCED3 during dehydration stress. These results suggested that NGA1 essentially functions as a transcriptional activator of NCED3 among the NGA family proteins. Moreover, the NGA1 protein was degraded under nonstressed conditions, and dehydration stress enhanced the accumulation of NGA1 proteins, even in ABA-deficient mutant plants, indicating that there should be ABA-independent posttranslational regulations. These findings emphasize the regulatory mechanisms of ABA biosynthesis during early drought stress.

scholarly journals Integration of Abscisic Acid Signaling with Other Signaling Pathways in Plant Stress Responses and Development

Plants ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 592 ◽  
Author(s):  
Manu Kumar ◽  
Mahipal Singh Kesawat ◽  
Asjad Ali ◽  
Sang-Choon Lee ◽  
Sarvajeet Singh Gill ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Seed Germination ◽  
Signaling Pathways ◽  
Stress Responses ◽  
Growth Regulation ◽  
Molecular Mechanisms ◽  
Stomatal Closure ◽  
Plant Stress ◽  
Aba Signaling ◽  
Complex Signaling

Plants are immobile and, to overcome harsh environmental conditions such as drought, salt, and cold, they have evolved complex signaling pathways. Abscisic acid (ABA), an isoprenoid phytohormone, is a critical signaling mediator that regulates diverse biological processes in various organisms. Significant progress has been made in the determination and characterization of key ABA-mediated molecular factors involved in different stress responses, including stomatal closure and developmental processes, such as seed germination and bud dormancy. Since ABA signaling is a complex signaling network that integrates with other signaling pathways, the dissection of its intricate regulatory network is necessary to understand the function of essential regulatory genes involved in ABA signaling. In the present review, we focus on two aspects of ABA signaling. First, we examine the perception of the stress signal (abiotic and biotic) and the response network of ABA signaling components that transduce the signal to the downstream pathway to respond to stress tolerance, regulation of stomata, and ABA signaling component ubiquitination. Second, ABA signaling in plant development processes, such as lateral root growth regulation, seed germination, and flowering time regulation is investigated. Examining such diverse signal integration dynamics could enhance our understanding of the underlying genetic, biochemical, and molecular mechanisms of ABA signaling networks in plants.

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