<scp>ABA</scp> regulation of root growth during soil drying and recovery can involve auxin response

Zhang, Qian; Yuan, Wei; QianWen, Wang; Cao, Yiying; Xu, Feiyun; Dodd, Ian C.; Xu, Weifeng

doi:10.1111/pce.14137

Cited by 42 publications

(32 citation statements)

References 67 publications

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“…Studies on ABA-deficient mutants have revealed that ABA is important to maintain root growth under drought [86]. Recently, Zhang et al [87] concluded that ABA-mediated root growth of tomatoes under soil drying may involve auxin-dependent processes. ABA deficient mutants vp5 and vp14 develop stunt primary root in maize [88], but primary root elongation is resorted by exogenous IAA in tomato mutant notabilis (not) under drought [87].…”

Section: Alteration In Root System Under Drought 41 Root System Architecturementioning

confidence: 99%

“…Recently, Zhang et al [87] concluded that ABA-mediated root growth of tomatoes under soil drying may involve auxin-dependent processes. ABA deficient mutants vp5 and vp14 develop stunt primary root in maize [88], but primary root elongation is resorted by exogenous IAA in tomato mutant notabilis (not) under drought [87]. However, ABA affects root architecture either positively or negatively based on the genotypic background and environmental conditions, offering a nuanced way to fine-tune the root system to compete with drought stress.…”

Section: Alteration In Root System Under Drought 41 Root System Architecturementioning

confidence: 99%

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Mechanisms of Abscisic Acid-Mediated Drought Stress Responses in Plants

Aslam

Waseem

Jakada

et al. 2022

IJMS

Self Cite

201

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Drought is one of the major constraints to rain-fed agricultural production, especially under climate change conditions. Plants evolved an array of adaptive strategies that perceive stress stimuli and respond to these stress signals through specific mechanisms. Abscisic acid (ABA) is a premier signal for plants to respond to drought and plays a critical role in plant growth and development. ABA triggers a variety of physiological processes such as stomatal closure, root system modulation, organizing soil microbial communities, activation of transcriptional and post-transcriptional gene expression, and metabolic alterations. Thus, understanding the mechanisms of ABA-mediated drought responses in plants is critical for ensuring crop yield and global food security. In this review, we highlighted how plants adjust ABA perception, transcriptional levels of ABA- and drought-related genes, and regulation of metabolic pathways to alter drought stress responses at both cellular and the whole plant level. Understanding the synergetic role of drought and ABA will strengthen our knowledge to develop stress-resilient crops through integrated advanced biotechnology approaches. This review will elaborate on ABA-mediated drought responses at genetic, biochemical, and molecular levels in plants, which is critical for advancement in stress biology research.

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Section: Alteration In Root System Under Drought 41 Root System Architecturementioning

confidence: 99%

Section: Alteration In Root System Under Drought 41 Root System Architecturementioning

confidence: 99%

Mechanisms of Abscisic Acid-Mediated Drought Stress Responses in Plants

Aslam

Waseem

Jakada

et al. 2022

IJMS

Self Cite

201

View full text Add to dashboard Cite

show abstract

“…More research is required to identify the key root phenotype(s) and signals which impact ψ c soil, since root hydraulic phenotypes that trigger earlier stomatal closure would help save water, whereas those that maintain transpiration during soil drying would (potentially) help maintain growth. In this issue Zhang et al (2022) report that signals from the plant hormones abscisic acid (ABA) and auxin play important roles to help maintain tomato root growth during soil drying. The authors applied a multi‐phasic water stress treatment, first involving moderate water stress (3 weeks), then severe drying (2 weeks), followed by re‐watering (3 days), to both wildtype and notabilis ( not ) ABA biosynthesis mutant plants.…”

Section: Water Uptake: More Than Just Deep Root Growthmentioning

confidence: 99%

Root phenotypes for the future

Amtmann

Bennett

Henry

2022

Plant Cell & Environment

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Root phenotypes play profoundly important roles supporting plant growth and their adaptive responses to myriad environmental stresses. For example, architecture-scale traits such as root angle can have a major impact on foraging efficiency for immobile and mobile soil nutrients such as phosphate and nitrate, respectively (Schneider et al., 2022). Increasing evidence supports the importance of anatomical-scale traits, such as root hair length and xylem size, conferring abiotic stress tolerance in crops (Cai et al., 2022;Cornelis & Hazak 2022;Kohli et al., 2022), whilst major steps are being made to dissect molecular-scale adaptive mechanisms, such as ways roots detoxify metals and metalloids (Kirk et al., 2022;Podar & Maathuis, 2022). Knowledge of these root phenotypes and their underlying regulatory genes is vital for developing future crop varieties better adapted to the challenges presented by global climate change and the pressing need to support more sustainable agricultural practices. This represents a multi-scale and -disciplinary endeavour, spanning agronomy, molecular biology, phenomics, breeding, soil science, and ecology to study, discover and decipher the key environmental stresses, adaptive root phenotypes, and their underlying mechanisms (Figure 1). In this editorial, we give an overview of the content of the Special Issue of Plant, Cell & Environment on "Root Phenotypes for the Future." Based on the articles collated in this Special Issue we discuss emerging root traits and their regulatory mechanisms. The arising new insights underpin efforts to create crop varieties more resilient against future environmental stresses and better adapted to sustainable soil management practices.

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“…In plants, drought stress induces a wide range of responses, including increasing the oxidative damage in chloroplasts, inhibiting photosynthesis, suppressing metabolic responses, activating glycocatabolism, and changing cellular lipid compositions ( Mittler and Blumwald, 2015 ; Yi et al, 2016 ; Li et al, 2019 ; Hrmova and Hussain, 2021 ; Waititu et al, 2021 ). ABA is the key phytohormone that mediates drought tolerance and rehydration compensation in plants ( Saradadevi et al, 2017 ; Mega et al, 2019 ; Zhang et al, 2021 ). Upon rehydration, the levels of ABA and several other hormones, including IAA, GA, and cytokinin, first decline rapidly and then rise slowly, resulting in a “V”-shaped changing pattern ( Dong et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

Rehydration Compensation of Winter Wheat Is Mediated by Hormone Metabolism and De-Peroxidative Activities Under Field Conditions

et al. 2022

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Water deficit and rehydration frequently occur during wheat cultivation. Previous investigations focused on the water deficit and many drought-responsive genes have been identified in winter wheat. However, the hormone-related metabolic responses and de-peroxidative activities associated with rehydration are largely unknown. In this study, leaves of two winter wheat cultivars, “Hengguan35” (HG, drought-tolerant cultivar) and “Shinong086” (SN, drought-sensitive cultivar), were used to investigate water deficit and the post-rehydration process. Rehydration significantly promoted wheat growth and postponed spike development. Quantifications of antioxidant enzymes, osmotic stress-related substances, and phytohormones revealed that rehydration alleviated the peroxidation and osmotic stress caused by water deficit in both cultivars. The wheat cultivar HG showed a better rehydration-compensation phenotype than SN. Phytohormones, including abscisic acid, gibberellin (GA), jasmonic acid (JA), and salicylic acid (SA), were detected using high-performance liquid chromatography and shown to be responsible for the rehydration process. A transcriptome analysis showed that differentially expressed genes related to rehydration were enriched in hormone metabolism- and de-peroxidative stress-related pathways. Suppression of genes associated with abscisic acid signaling transduction were much stronger in HG than in SN upon rehydration treatment. HG also kept a more balanced expression of genes involved in reactive oxygen species pathway than SN. In conclusion, we clarified the hormonal changes and transcriptional profiles of drought-resistant and -sensitive winter wheat cultivars in response to drought and rehydration, and we provided insights into the molecular processes involved in rehydration compensation.

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ABA regulation of root growth during soil drying and recovery can involve auxin response

Cited by 42 publications

References 67 publications

Mechanisms of Abscisic Acid-Mediated Drought Stress Responses in Plants

Mechanisms of Abscisic Acid-Mediated Drought Stress Responses in Plants

Root phenotypes for the future

Rehydration Compensation of Winter Wheat Is Mediated by Hormone Metabolism and De-Peroxidative Activities Under Field Conditions

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