Genome-wide identification and characterization of the Populus WRKY transcription factor family and analysis of their expression in response to biotic and abiotic stresses

Jiang, Yuanzhong; Duan, Yumin; Yin, Jing; Ye, Sheng‐Long; Zhu, Jingru; Zhang, Faqi; Lu, Wei; Fan, Di; Luo, Keming

doi:10.1093/jxb/eru381

Cited by 176 publications

(150 citation statements)

References 83 publications

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“…WRKY TFs also regulate the leaf senescence process, for example, AtWRKY57 represses leaf senescence by interacting with JAZ4/JAZ8 (JASMONATE ZIM‐DOMAIN4/8) and IAA29 (Indole Acetic Acid 29), which are the repressors of the JA and Auxin signaling pathways, respectively. JAZ4/8 and IAA29 interact with WRKY57 competitively, and exhibit different functions in JA‐induced leaf senescence, which is consistent with the opposing functions of JA and auxin in leaf senescence (Jiang et al ). AtWRKY53 and AtWRKY70 were positive and negative regulators of senescence in Arabidopsis , respectively (Hu et al ).…”

Section: Introductionsupporting

confidence: 76%

WRKY transcription factors in plant responses to stresses

Jiang

et al. 2017

JIPB

695

456

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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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Section: Introductionsupporting

confidence: 76%

WRKY transcription factors in plant responses to stresses

Jiang

et al. 2017

JIPB

695

456

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“…Marker genes for the SA signaling pathway (Derksen et al ., ; Jiang et al ., ), pathogenesis‐related gene 1 ( PR‐1 ) and two WRKY genes ( WRKY 70 , WRKY 89 ) were significantly up‐regulated by rust infection (Fig. b; Table ).…”

Section: Resultsmentioning

confidence: 99%

Leaf rust infection reduces herbivore‐induced volatile emission in black poplar and attracts a generalist herbivore

et al. 2017

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Plants release complex volatile blends after separate attack by herbivores and pathogens, which play many roles in interactions with other organisms. Large perennials are often attacked by multiple enemies, but the effect of combined attacks on volatile emission is rarely studied, particularly in trees. We infested Populus nigra trees with a pathogen, the rust fungus Melampsora larici-populina, and Lymantria dispar caterpillars alone and in combination. We investigated poplar volatile emission and its regulation, as well as the behavior of the caterpillars towards volatiles from rust-infected and uninfected trees. Both the rust fungus and the caterpillars alone induced volatile emission from poplar trees. However, the herbivore-induced volatile emission was significantly reduced when trees were under combined attack by the herbivore and the fungus. Herbivory induced terpene synthase transcripts as well as jasmonate concentrations, but these increases were suppressed when the tree was additionally infected with rust. Caterpillars preferred volatiles from rust-infected over uninfected trees. Our results suggest a defense hormone crosstalk upon combined herbivore-pathogen attack in poplar trees which results in lowered emission of herbivore-induced volatiles. This influences the preference of herbivores, and might have other far-reaching consequences for the insect and pathogen communities in natural poplar forests.

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“…For example, 61 of the PtrWRKY genes in Populus are induced by biotic and abiotic treatments, such as Marssonina bruuea , salicylic acid (SA), methyl jasmonate (MeJA), wounding, cold and salinity (Jiang et al, 2014). In rice, expression of OsWRKY 71 gene is induced by cold stress (Kim et al, 2016), while it also encodes a transcriptional repressor of GA signaling in aleurone cells (Zhang et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Genome-wide analysis of WRKY transcription factors in wheat (Triticum aestivum L.) and differential expression under water deficit condition

Ning

Liu

Kang

et al. 2017

PeerJ

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Background. WRKY proteins, which comprise one of the largest transcription factor (TF) families in the plant kingdom, play crucial roles in plant development and stress responses. Despite several studies on WRKYs in wheat (Triticum aestivum L.), functional annotation information about wheat WRKYs is limited. Results. Here, 171 TaWRKY TFs were identified from the whole wheat genome and compared with proteins from 19 other species representing nine major plant lineages. A phylogenetic analysis, coupled with gene structure analysis and motif determination, divided these TaWRKYs into seven subgroups (Group I, IIa-e, and III). Chromosomal location showed that most TaWRKY genes were enriched on four chromosomes, especially on chromosome 3B. In addition, 85 (49.7%) genes were either tandem (5) or segmental duplication (80), which suggested that though tandem duplication has contributed to the expansion of TaWRKY family, segmental duplication probably played a more pivotal role. Analysis of cis-acting elements revealed putative functions of WRKYs in wheat during development as well as under numerous biotic and abiotic stresses. Finally, the expression of TaWRKY genes in flag leaves, glumes, and lemmas under water-deficit condition were analyzed. Results showed that different TaWRKY genes preferentially express in specific tissue during the grain-filling stage. Conclusion. Our results provide a more extensive insight on WRKY gene family in wheat, and also contribute to the screening of more candidate genes for further investigation on function characterization of WRKYs under various stresses.

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Genome-wide identification and characterization of the Populus WRKY transcription factor family and analysis of their expression in response to biotic and abiotic stresses

Abstract: Highlight textThis study presents the genome-wide characterization of the Populus WRKY family under biotic and abiotic stresses. Overexpression of an SA-inducible gene, PtrWRKY89, enhanced resistance to pathogens in transgenic poplar.

Cited by 176 publications

References 83 publications

WRKY transcription factors in plant responses to stresses

WRKY transcription factors in plant responses to stresses

Leaf rust infection reduces herbivore‐induced volatile emission in black poplar and attracts a generalist herbivore

Genome-wide analysis of WRKY transcription factors in wheat (Triticum aestivum L.) and differential expression under water deficit condition

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