CsATAF1 Positively Regulates Drought Stress Tolerance by an ABA-Dependent Pathway and by Promoting ROS Scavenging in Cucumber

Wang, Jinfang; Zhang, Lei; Cao, Yunyun; Qi, Chuandong; Li, Shuangtao; Liu, Lun; Wang, Gongle; Mao, Aijun; Ren, Shuxin; Guo, Yang-Dong

doi:10.1093/pcp/pcy030

Cited by 83 publications

(59 citation statements)

References 57 publications

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“…When drought and high temperature stress conditions occur, the plant stimulates the expression of TFs to regulate the expression of downstream responsive genes that enhance the resistance to stress [ 36 ]. TFs such as NAC, WRKY, DREB, and MYB, which are closely related to the stress response in plants, help plants regulate their activities in adverse environments [ 37 ]. Drought stress affected the expression of antioxidant-related TFs in naked oat seedlings during the experiment ( Figure 6 ).…”

Section: Resultsmentioning

confidence: 99%

Effects of Melatonin on Antioxidant Capacity in Naked Oat Seedlings under Drought Stress

et al. 2018

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Melatonin (N-acetyl-5-methoxytryptamine, MT) is a molecule with pleiotropic effects including antioxidant activity, regulated plant growth, development, and reduced environmental stress in plants. However, only a few studies have analyzed the effect of exogenous MT on drought stress in naked oat seedlings. Therefore, in this study, we studied the effects of exogenous MT on the antioxidant capacity of naked oat under drought stress to understand the possible antioxidant mechanism. The results showed that a pretreatment of 100 μM MT reduced the hydrogen peroxide (H2O2) and superoxide anion (O2−•) contents. MT also enhanced superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX) activities in the leaves of naked oat seedlings under 20% PEG-6000 drought stress. MT upregulated the expression levels of the mitogen-activated protein kinases (MAPKs) Asmap1 and Aspk11, and the transcription factor (TF) genes (except for NAC), WRKY1, DREB2, and MYB increased in drought with MT pretreatment seedlings when compared with seedlings exposed to drought stress alone. These data indicated that the MT-mediated induction of the antioxidant response may require the activation of reactive oxygen species (ROS) and MAPK, followed by triggering a downstream MAPK cascade such as Asmap1 and Aspk11, to regulate the expression of antioxidant-related genes. This study demonstrated that MT could induce the expression of MAPKs and TFs and regulate the expression of downstream stress-responsive genes, thereby increasing the plant’s tolerance. This may provide a new idea for MT modulation in the regulation of plant antioxidant defenses. These results provide a theoretical basis for MT to alleviate drought stress in naked oat.

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Section: Resultsmentioning

confidence: 99%

Effects of Melatonin on Antioxidant Capacity in Naked Oat Seedlings under Drought Stress

et al. 2018

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“…It indicates that the regulatory roles of PheMYB4 and PheMYB4-1 were similar in response to cold stress but different under salt or drought treatment. “A boost in ABA biosynthesis is a frequently observed plant response to abiotic stresses ( And and Bartels, 1996 ), and this has the effect of triggering a number of ABA-dependent genes involved in the stress response” ( Fujita et al, 2004 ; Li et al, 2010 ; Zhou et al, 2010 , 2018 ; Wang et al, 2018 ). For most plants, they involved in a crosstalk of both ABA-dependent and ABA-independent pathways to better adapt to survival in environmental stresses ( Riera et al, 2005 ; Barrero et al, 2006 ; Yoshida et al, 2014 ).…”

Section: Discussionmentioning

confidence: 99%

The R2R3MYB Gene Family in Phyllostachys edulis: Genome-Wide Analysis and Identification of Stress or Development-Related R2R3MYBs

Hou¹,

Cheng²,

Xie³

et al. 2018

Front. Plant Sci.

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The MYB transcription factor (TF) is one of the largest gene families in plants and involved to multiple biological processes. However, little is known about the MYB family and its functional role in the genome of moso bamboo. In the present study, a total of 114 R2R3MYB genes were first identified from moso bamboo genome and full-length non-chimeric (FLNC) reads. Phylogenetic analysis coupled with gene structure analysis and motif determination resulted in the division of these PheR2R3MYBs into 17 subgroups. The position of eight proteins along an external branch in the phylogenetic tree suggested their relatively ancient origin. The genes in this group were all substituted by (Met, M)/(Arg, R) at conservative W residues in both R2 and R3 repeats, and half were found to possess no transcriptional activation activity. The analysis of evolutionary patterns and divergence suggests that the expansion of PheMYBs was mainly attributable to whole genome duplication (WGD) under different selection pressures. Expressional analysis based on microarray and qRT-PCR data performed diverse expression patterns of R2R3MYBs in response to both various abiotic stimuli and flower development. Furthermore, the co-expression analysis of R2R3MYBs suggested an intricate interplay of growth- and stress-related responses. Finally, we found a hub gene, PheMYB4, was involved in a complex proteins interaction network. Further functional analysis indicated that ectopic overexpression of its homologous gene, PheMYB4-1, could increase tolerance to cold treatment and sensitivity to drought and salt treatment of transgenic Arabidopsis seedlings. These findings provide comprehensive insights into the MYB family members in moso bamboo and offer candidate MYB genes for further studies on their roles in stress resistance.

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“…Currently, it has been revealed by a number of research reports that NAC proteins are critically involved in escalating the antioxidant defense system under abiotic stresses. In cucumber ( Cucumis sativus ), CsATAF1 was recently shown to promote ROS detoxification via direct regulation of three antioxidant system genes, including CsCu-ZnSOD , CsABI5 , and CsDREB2C , improving tolerance to drought stress [ 198 ]. On the other hand, TaNAC29 from wheat was reported to reduce membrane damage and H 2 O 2 accumulation by enhancing the antioxidant system in plants, which finally culminates in salt stress tolerance [ 177 ].…”

Section: Potential Molecular Mechanisms Of Tfs In Controlling Planmentioning

confidence: 99%

Revisiting the Role of Plant Transcription Factors in the Battle against Abiotic Stress

Khan

Wang

et al. 2018

IJMS

202

118

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Owing to diverse abiotic stresses and global climate deterioration, the agricultural production worldwide is suffering serious losses. Breeding stress-resilient crops with higher quality and yield against multiple environmental stresses via application of transgenic technologies is currently the most promising approach. Deciphering molecular principles and mining stress-associate genes that govern plant responses against abiotic stresses is one of the prerequisites to develop stress-resistant crop varieties. As molecular switches in controlling stress-responsive genes expression, transcription factors (TFs) play crucial roles in regulating various abiotic stress responses. Hence, functional analysis of TFs and their interaction partners during abiotic stresses is crucial to perceive their role in diverse signaling cascades that many researchers have continued to undertake. Here, we review current developments in understanding TFs, with particular emphasis on their functions in orchestrating plant abiotic stress responses. Further, we discuss novel molecular mechanisms of their action under abiotic stress conditions. This will provide valuable information for understanding regulatory mechanisms to engineer stress-tolerant crops.

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CsATAF1 Positively Regulates Drought Stress Tolerance by an ABA-Dependent Pathway and by Promoting ROS Scavenging in Cucumber

Cited by 83 publications

References 57 publications

Effects of Melatonin on Antioxidant Capacity in Naked Oat Seedlings under Drought Stress

Effects of Melatonin on Antioxidant Capacity in Naked Oat Seedlings under Drought Stress

The R2R3MYB Gene Family in Phyllostachys edulis: Genome-Wide Analysis and Identification of Stress or Development-Related R2R3MYBs

Revisiting the Role of Plant Transcription Factors in the Battle against Abiotic Stress

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