scholarly journals PtrWRKY73, a salicylic acid-inducible poplar WRKY transcription factor, is involved in disease resistance in Arabidopsis thaliana

2015 ◽  
Vol 34 (5) ◽  
pp. 831-841 ◽  
Author(s):  
Yanjiao Duan ◽  
Yuanzhong Jiang ◽  
Shenglong Ye ◽  
Abdul Karim ◽  
Zhengyi Ling ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Transcription Factor ◽  
Salicylic Acid ◽  
Disease Resistance ◽  
Wrky Transcription Factor

scholarly journals Age-Related Resistance in Arabidopsis thaliana Involves the MADS-Domain Transcription Factor SHORT VEGETATIVE PHASE and Direct Action of Salicylic Acid on Pseudomonas syringae

2017 ◽  
Vol 30 (11) ◽  
pp. 919-929 ◽  
Author(s):  
Daniel C. Wilson ◽  
Christine J. Kempthorne ◽  
Philip Carella ◽  
David K. Liscombe ◽  
Robin K. Cameron
Keyword(s):  
Arabidopsis Thaliana ◽  
Transcription Factor ◽  
Salicylic Acid ◽  
Disease Resistance ◽  
Antimicrobial Agent ◽  
Pseudomonas Syringae ◽  
Antibiofilm Activity ◽  
Vegetative Phase ◽  
Short Vegetative Phase ◽  
Age Related

Arabidopsis thaliana exhibits a developmentally regulated disease-resistance response known as age-related resistance (ARR), a process that requires intercellular accumulation of salicylic acid (SA), which is thought to act as an antimicrobial agent. ARR is characterized by enhanced resistance to some pathogens at the late adult-vegetative and reproductive stages. While the transition to flowering does not cause the onset of ARR, both processes involve the MADS-domain transcription factor SHORT VEGETATIVE PHASE (SVP). In this study, ARR-defective svp mutants were found to accumulate reduced levels of intercellular SA compared with wild type in response to Pseudomonas syringae pv. tomato. Double mutant and overexpression analyses suggest that SVP and SOC1 (SUPPRESSOR OF OVEREXPRESSION OF CO 1) act antagonistically, such that SVP is required for ARR to alleviate the negative effects of SOC1 on SA accumulation. In vitro, SA exhibited antibacterial and antibiofilm activity at concentrations similar to those measured in the intercellular space during ARR. In vivo, P. syringae pv. tomato formed biofilm-like aggregates in young susceptible plants, while this was drastically reduced in mature ARR-competent plants, which accumulate intercellular SA. Collectively, these results reveal a novel role for the floral regulators SVP and SOC1 in disease resistance and provide evidence that SA acts directly on pathogens as an antimicrobial agent. [Formula: see text] Copyright © 2017 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license .

scholarly journals Bioinformatic Prediction of SNP Markers in WRKY Sequences of Palms

CORD ◽  
2011 ◽  
Vol 27 (2) ◽  
pp. 9 ◽  
Author(s):  
Arunachalam, V
Keyword(s):  
Transcription Factor ◽  
Disease Resistance ◽  
Wrky Transcription Factor ◽  
Snp Markers ◽  
Nucleotide Polymorphisms ◽  
Transcription Factor Gene ◽  
Wrky Transcription Factors ◽  
Nucleotide Level ◽  
Single Nucleotide ◽  
Factor Gene

WRKY transcription factors are unique to plants and performs many imperative functions mainly disease resistance. In the present study we have analyzed the WRKY transcription factor gene sequences to assess the variation at single nucleotide level. We have retrieved 525 sequences of WRKY genes of palms of 334 Kb size. The sequences were purified by employing EST trimmer and were clustered into 31 contigs using CAP3. Single nucleotide Polymorphisms (SNP) and insertion/deletions (indels) were detected in contigs using the AUTOSNP software. Alternatively candidate SNP containing contigs were aligned by Clustal X to locate the SNPs. Results from these two methods were compared and false SNPs were eliminated. Finally, about 568 SNPs were found including 250 transitions, 120 transversions and 198 indels. The SNPs were seen at a frequency of 2.84/100bp in the WRKY sequences of palms. Primers were designed flanking to SNP/ indel sites with potential as markers in palms. We could obtain two novel WRKY-SNP markers (WRKY 7 and WRKY 12) which are not reported before in palms.

scholarly journals Facilitation of Fusarium graminearum Infection by 9-Lipoxygenases in Arabidopsis and Wheat

2015 ◽  
Vol 28 (10) ◽  
pp. 1142-1152 ◽  
Author(s):  
Vamsi J. Nalam ◽  
Syeda Alam ◽  
Jantana Keereetaweep ◽  
Barney Venables ◽  
Dehlia Burdan ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Salicylic Acid ◽  
Disease Resistance ◽  
Jasmonic Acid ◽  
Fusarium Graminearum ◽  
Head Blight ◽  
Enhanced Resistance ◽  
Susceptibility Factors ◽  
Ja Signaling ◽  
Important Disease

Fusarium graminearum causes Fusarium head blight, an important disease of wheat. F. graminearum can also cause disease in Arabidopsis thaliana. Here, we show that the Arabidopsis LOX1 and LOX5 genes, which encode 9-lipoxygenases (9-LOXs), are targeted during this interaction to facilitate infection. LOX1 and LOX5 expression were upregulated in F. graminearum–inoculated plants and loss of LOX1 or LOX5 function resulted in enhanced disease resistance in the corresponding mutant plants. The enhanced resistance to F. graminearum infection in the lox1 and lox5 mutants was accompanied by more robust induction of salicylic acid (SA) accumulation and signaling and attenuation of jasmonic acid (JA) signaling in response to infection. The lox1- and lox5-conferred resistance was diminished in plants expressing the SA-degrading salicylate hydroxylase or by the application of methyl-JA. Results presented here suggest that plant 9-LOXs are engaged during infection to control the balance between SA and JA signaling to facilitate infection. Furthermore, since silencing of TaLpx-1 encoding a 9-LOX with homology to LOX1 and LOX5, resulted in enhanced resistance against F. graminearum in wheat, we suggest that 9-LOXs have a conserved role as susceptibility factors in disease caused by this important fungus in Arabidopsis and wheat.

scholarly journals A Novel WRKY Transcription Factor Is Required for Induction of PR-1a Gene Expression by Salicylic Acid and Bacterial Elicitors

2008 ◽  
Vol 146 (4) ◽  
pp. 1983-1995 ◽  
Author(s):  
Marcel C. van Verk ◽  
Dimitri Pappaioannou ◽  
Lyda Neeleman ◽  
John F. Bol ◽  
Huub J.M. Linthorst
Keyword(s):  
Gene Expression ◽  
Transcription Factor ◽  
Salicylic Acid ◽  
Wrky Transcription Factor
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