Arabidopsis &lt;I&gt;WRKY2&lt;/I&gt; Transcription Factor may be Involved in Osmotic Stress Response

Wen, Jiang

doi:10.3724/sp.j.1143.2010.00427

Cited by 6 publications

(6 citation statements)

References 26 publications

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“…This class of TFs are one of the well-studied proteins whose mechanism of action, autoregulation and cross-regulation in signaling and evolution have been reported (Bakshi and Oelmüller, 2014 ). Though initially considered as vital players of biotic stress tolerance, WRKY TFs were later discovered to play significant roles in conferring tolerance to diverse abiotic stresses including salinity (Jiang and Yu, 2009 ; Chen et al, 2010 ), drought, heat (Li et al, 2009 , 2011 ), cold (Zou et al, 2010 ), H 2 O 2 (Song et al, 2009 ), ozone oxidative stress (Jiang and Deyholos, 2009 ), UV radiation (Jiang and Deyholos, 2009 ), sugar starvation (Song et al, 2010 ), phosphate depreviation (Chen et al, 2009 ) and wounding (Shang et al, 2010 ). Further, numerous reports have indicated the response of a single WRKY gene to several stress factors, thus highlighting the diverse regulatory role of WRKY proteins in stress response (Wei et al, 2008 ; Jiang and Deyholos, 2009 ; Li et al, 2009 , 2011 ; Chen et al, 2012 ).…”

Section: Discussionmentioning

confidence: 99%

Global analysis of WRKY transcription factor superfamily in Setaria identifies potential candidates involved in abiotic stress signaling

et al. 2015

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Transcription factors (TFs) are major players in stress signaling and constitute an integral part of signaling networks. Among the major TFs, WRKY proteins play pivotal roles in regulation of transcriptional reprogramming associated with stress responses. In view of this, genome- and transcriptome-wide identification of WRKY TF family was performed in the C4model plants, Setaria italica (SiWRKY) and S. viridis (SvWRKY), respectively. The study identified 105 SiWRKY and 44 SvWRKY proteins that were computationally analyzed for their physicochemical properties. Sequence alignment and phylogenetic analysis classified these proteins into three major groups, namely I, II, and III with majority of WRKY proteins belonging to group II (53 SiWRKY and 23 SvWRKY), followed by group III (39 SiWRKY and 11 SvWRKY) and group I (10 SiWRKY and 6 SvWRKY). Group II proteins were further classified into 5 subgroups (IIa to IIe) based on their phylogeny. Domain analysis showed the presence of WRKY motif and zinc finger-like structures in these proteins along with additional domains in a few proteins. All SiWRKY genes were physically mapped on the S. italica genome and their duplication analysis revealed that 10 and 8 gene pairs underwent tandem and segmental duplications, respectively. Comparative mapping of SiWRKY and SvWRKY genes in related C4 panicoid genomes demonstrated the orthologous relationships between these genomes. In silico expression analysis of SiWRKY and SvWRKY genes showed their differential expression patterns in different tissues and stress conditions. Expression profiling of candidate SiWRKY genes in response to stress (dehydration and salinity) and hormone treatments (abscisic acid, salicylic acid, and methyl jasmonate) suggested the putative involvement of SiWRKY066 and SiWRKY082 in stress and hormone signaling. These genes could be potential candidates for further characterization to delineate their functional roles in abiotic stress signaling.

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Section: Discussionmentioning

confidence: 99%

Global analysis of WRKY transcription factor superfamily in Setaria identifies potential candidates involved in abiotic stress signaling

et al. 2015

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“…Both types of mutants exhibited increased sensitivity to saline stress [ 34 ]. Arrest of seed germination under the influence of ABA is levied by AtWRKY2, which has been proposed to act as a negative feedback regulator of ABA-induced seed dormancy [ 74 ]. AtWRKY57, AtWRKY8, and AtWRKY28 regulate signaling cascades in salinity, drought, osmotic, and oxidative stresses [ 75 ] ( Figure 2 ).…”

Section: Transgenic Approaches For Overexpression Of Wrky Proteinsmentioning

confidence: 99%

WRKY Proteins: Signaling and Regulation of Expression during Abiotic Stress Responses

Banerjee

Roychoudhury

2015

The Scientific World Journal

245

133

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WRKY proteins are emerging players in plant signaling and have been thoroughly reported to play important roles in plants under biotic stress like pathogen attack. However, recent advances in this field do reveal the enormous significance of these proteins in eliciting responses induced by abiotic stresses. WRKY proteins act as major transcription factors, either as positive or negative regulators. Specific WRKY factors which help in the expression of a cluster of stress-responsive genes are being targeted and genetically modified to induce improved abiotic stress tolerance in plants. The knowledge regarding the signaling cascade leading to the activation of the WRKY proteins, their interaction with other proteins of the signaling pathway, and the downstream genes activated by them are altogether vital for justified targeting of the WRKY genes. WRKY proteins have also been considered to generate tolerance against multiple abiotic stresses with possible roles in mediating a cross talk between abiotic and biotic stress responses. In this review, we have reckoned the diverse signaling pattern and biological functions of WRKY proteins throughout the plant kingdom along with the growing prospects in this field of research.

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“…(Yan et al ). Constitutive expression of ZmWRKY23 ( Zea mays ) in A. thaliana also enhances its tolerance to salt stress (Jiang et al ).…”

Section: Introductionmentioning

confidence: 99%

WRKY transcription factors in plant responses to stresses

Jiang

et al. 2017

JIPB

744

469

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The WRKY gene family is among the largest families of transcription factors (TFs) in higher plants. By regulating the plant hormone signal transduction pathway, these TFs play critical roles in some plant processes in response to biotic and abiotic stress. Various bodies of research have demonstrated the important biological functions of WRKY TFs in plant response to different kinds of biotic and abiotic stresses and working mechanisms. However, very little summarization has been done to review their research progress. Not just important TFs function in plant response to biotic and abiotic stresses, WRKY also participates in carbohydrate synthesis, senescence, development, and secondary metabolites synthesis. WRKY proteins can bind to W-box (TGACC (A/T)) in the promoter of its target genes and activate or repress the expression of downstream genes to regulate their stress response. Moreover, WRKY proteins can interact with other TFs to regulate plant defensive responses. In the present review, we focus on the structural characteristics of WRKY TFs and the research progress on their functions in plant responses to a variety of stresses.

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Arabidopsis <I>WRKY2</I> Transcription Factor may be Involved in Osmotic Stress Response

Cited by 6 publications

References 26 publications

Global analysis of WRKY transcription factor superfamily in Setaria identifies potential candidates involved in abiotic stress signaling

Global analysis of WRKY transcription factor superfamily in Setaria identifies potential candidates involved in abiotic stress signaling

WRKY Proteins: Signaling and Regulation of Expression during Abiotic Stress Responses

WRKY transcription factors in plant responses to stresses

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