Abiotic Stresses Intervene with ABA Signaling to Induce Destructive Metabolic Pathways Leading to Death: Premature Leaf Senescence in Plants

Asad, Muhammad Asad Ullah; Zakari, Shamsu Ado; Zhao, Qian; Zhou, Lujian; Ye, Yu; Cheng, Fangmin

doi:10.3390/ijms20020256

Cited by 85 publications

(63 citation statements)

References 158 publications

(217 reference statements)

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“…Abscisic acid (ABA) is a sesquiterpenoid and a signal molecule that is important in plant tolerance to stress factors . ABA can be synthesized by a direct pathway in fungi and by an indirect pathway in plants . In the indirect pathway, ABA is produced by oxidative cleavage of a C 40 carotenoid precursor .…”

Section: Introductionmentioning

confidence: 99%

“…11 ABA can be synthesized by a direct pathway in fungi and by an indirect pathway in plants. 12 In the indirect pathway, ABA is produced by oxidative cleavage of a C 40 carotenoid precursor. 11,13 Some endogenous enzymes, including aldehyde oxidase (AO), 9-cisepoxycarotenoid dioxygenase (NCED), and zeaxanthin epoxidase (ZEP), may be involved in the indirect pathway of ABA synthesis.…”

Section: Introductionmentioning

confidence: 99%

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Regulation of the biosynthesis of endogenous nitric oxide and abscisic acid in stored peaches by exogenous nitric oxide and abscisic acid

et al. 2020

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BACKGROUND Nitric oxide (NO) and abscisic acid (ABA) are important regulators of plant response to cold stress, and they interact in response to cold signals. The primary goal of this study was to determine the roles of exogenous NO and ABA on the synthesis of endogenous NO and ABA in cold‐stored peach fruit. RESULTS Exogenous NO and ABA maintained a relatively high content of NO, increased nitrate reductase (NR) activity, and inhibited the activity of NO synthase (NOS)‐like and the levels of polyamine biosynthesis in peaches during cold storage. Treatments of potassium 2‐(4‐carboxyphenyl)‐4,4,5,5‐tetramethylimidazoline‐1‐oxyl‐3‐oxide (c‐PTIO), NO, N‐nitro‐l‐Arg‐methyl ester (L‐NAME), and sodium tungstate did not influence ABA content. Exogenous ABA increased the content of carotenoids and the activities of aldehyde oxidase (AO), 9‐cis‐epoxycarotenoid dioxygenase (NCED), and zeaxanthin epoxidase (ZEP) of ABA synthesis in peaches during cold storage, and upregulated the gene expression of PpAO1, PpNCED1, PpNCED2, and PpZEP. The production of endogenous NO was differentially inhibited by NO scavengers, ABA inhibitors, and NR inhibitors, but not affected by NOS‐like inhibitors during cold storage. CONCLUSION Exogenous NO and ABA can induce endogenous NO synthesis in cold‐stored peaches by the nitrate reductase pathway, and ABA can mediate endogenous ABA synthesis by the autocatalytic reaction. NO does not regulate ABA synthesis. © 2019 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Regulation of the biosynthesis of endogenous nitric oxide and abscisic acid in stored peaches by exogenous nitric oxide and abscisic acid

et al. 2020

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“…The ability of photosynthesis determines plant growth status, while chloroplast biogenesis and function affect the efficiency of photosynthesis. Recent studies have shown that photosynthesis is regulated by the target of rapamycin (TOR) and ABA signaling pathways [42,46,47]. TOR signaling acts as a positive regulatory factor to promote plant chloroplast biogenesis and photosynthesis, whereas ABA signaling acts as a negative regulatory signal to inhibit photosynthesis [42,[47][48][49][50].…”

Section: Discussionmentioning

confidence: 99%

StABI5 Involved in the Regulation of Chloroplast Development and Photosynthesis in Potato

Zhu

Feng

et al. 2020

IJMS

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Abscisic acid (ABA) insensitive 5 (ABI5)—a core transcription factor of the ABA signaling pathway—is a basic leucine zipper transcription factor that plays a key role in the regulation of seed germination and early seedling growth. ABI5 interacts with other phytohormone signals to regulate plant growth and development, and stress responses in Arabidopsis, but little is known about the functions of ABI5 in potatoes. Here, we find that StABI5 is involved in the regulation of chloroplast development and photosynthesis. Genetic analysis indicates that StABI5 overexpression transgenic potato lines accelerate dark-induced leaf yellowing and senescence. The chlorophyll contents of overexpressed StABI5 transgenic potato lines were significantly decreased in comparison to those of wild-type Desiree potatoes under dark conditions. Additionally, the RNA-sequencing (RNA-seq) analysis shows that many metabolic processes are changed in overexpressed StABI5 transgenic potatoes. Most of the genes involved in photosynthesis and carbon fixation are significantly down-regulated, especially the chlorophyll a-b binding protein, photosystem I, and photosystem II. These observations indicate that StABI5 negatively regulates chloroplast development and photosynthesis, and provides some insights into the functions of StABI5 in regard to potato growth.

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“…ABA is an important messenger that acts as the signaling mediator during oxidation and stress adaption. ABA reduces ROS damage in two ways: by inhibiting ROS production during OXPHOS and by regulating the expression of genes related to ROS scavenging [39]. During OXPHOS, ABA binds to the receptor Mg-chelatase H subunit/putative ABA receptor (CHLH/ABAR) to induce TF PPR.…”

Section: Discussionmentioning

confidence: 99%

Cytosine methylation in the promoter region of genes involved in cellular oxidation equilibrium pathways affects rice heat tolerance

Zhang

et al. 2020

Preprint

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Background High temperatures are detrimental to rice yield and quality, especially at night. Due to the predicted increases in global warming, it is imperative that crops are able to adapt to high night temperatures (HNTs) in the near future. DNA methylation is a potential mechanism for controlling gene activity and cellular phenotype under adversely environment without changing nucleotide sequence.Results Here, we reported that few CG and CHG contexts but CHH context in rice genome was strongly induced by HNT to occur cytosine methylation variation between two coisogenic rice strains with significant difference in heat tolerance. Methylation variations occurred mainly on successive cytosines in the promoter or downstream regions of transcription factors and transposon elements. In contrast to the heat-sensitive rice strain, two basal transcriptional factor TFIID subunit 11 and mediator of RNA polymerase II transcription subunit 31 were fully demethylated in the downstream 358-359 bp and 2-60 bp under HNT in the heat-tolerant strain, respectively. Various genes involved in ABA-related reactive oxygen species (ROS) equilibrium pathways, including the pentatricopeptide repeat domain gene PPR (LOC_Os07g28900) and the homeobox domain gene homeobox (LOC_Os01g19694), were induced by HNT to occur methylation variation on successive cytosines in the gene promoter regions of the heat-tolerant strain. Varidation among the typical heat-tolerant group and heat-sensitive group of rice germplasms, methylation rate of the cytosines in gene promoter region for gene PPR was higher and gene expression was suppressed in the heat-sensitive group, comparing to the heat-tolerant group.Conclusions The CHH context in rice genome was the main context type to occur cytosine methylation variation under HNT between the heat-sensitive and heat-tolerant rice strains. Methylation in the promoter regions of the genes related to abscisic acid-related oxidation and ROS scavenging contributes to rice heat tolerance. These findings provide bases to explain the molecular mechanisms behind rice heat tolerance.

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Abiotic Stresses Intervene with ABA Signaling to Induce Destructive Metabolic Pathways Leading to Death: Premature Leaf Senescence in Plants

Cited by 85 publications

References 158 publications

Regulation of the biosynthesis of endogenous nitric oxide and abscisic acid in stored peaches by exogenous nitric oxide and abscisic acid

Regulation of the biosynthesis of endogenous nitric oxide and abscisic acid in stored peaches by exogenous nitric oxide and abscisic acid

StABI5 Involved in the Regulation of Chloroplast Development and Photosynthesis in Potato

Cytosine methylation in the promoter region of genes involved in cellular oxidation equilibrium pathways affects rice heat tolerance

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