Plant MYB transcription factors are implicated in resistance to biotic and abiotic stresses. Here, we demonstrate that an R2-R3 MYB transcription factor, AtMYB44, plays a role in the plant defence response to the bacterial pathogen Pseudomonas syringae pv. tomato DC3000 (PstDC3000). The expression of AtMYB44 was upregulated upon pathogen infection and treatments with defence-related phytohormones. Transgenic plants overexpressing AtMYB44 (35S-Ms) exhibited greater levels of PR1 gene expression, cell death, callose deposition and hydrogen peroxide (H2O2) accumulation in leaves infected with PstDC3000. Consequently, 35S-M lines displayed enhanced resistance to PstDC3000. In contrast, the atmyb44 T-DNA insertion mutant was more susceptible to PstDC3000 and exhibited decreased PR1 gene expression upon infection. Using double mutants constructed via crosses of 35S-M lines with NahG transgenic plants and nonexpressor of pathogenesis-related genes1 mutant (npr1-1), we demonstrated that the enhanced PR1 gene expression and PstDC3000 resistance in 35S-M plants occur mainly through the salicylic acid signalling pathway.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1071/FP12253 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Re-Examination Characterization and Screening of Stripe Rust Resistance Gene of Wheat Gene Family Based on the Transcriptome in Xinchun 32.
Int J Mol Sci
January 2025
Key Laboratory of the Pest Monitoring and Safety Control of Crops and Forests of the Xinjiang Uygur Autonomous Region, College of Agronomy, Xinjiang Agricultural University, Urumqi 830052, China.
Pathogenesis-related protein-1 (PR1) encodes a water-soluble protein produced in plants after pathogen infection or abiotic stimulation. It plays a crucial role in plant-induced resistance by attacking pathogens, degrading cell wall macromolecules and pathogen toxins, and inhibiting the binding of viral coat proteins to plant receptor molecules. Compared to model plants, the mechanism of action of PR1 in wheat remains underexplored.
View Article and Find Full Text PDFA Zinc Polyphenolic Compound Increases Maize Resistance Against Infection by .
Plants (Basel)
December 2024
Laboratório da Interação Planta-Patógeno, Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-900, Minas Gerais, Brazil.
Maize leaf blight (MLB), caused by the fungus , is an important disease affecting maize production. In order to minimize the use of fungicides in agriculture, nutrient-based resistance inducers may become a promising alternative to manage MLB. The goal of this study was to investigate the potential of Semia (zinc (20%) complexed with a plant-derived pool of polyphenols (10%)) to hamper the infection of maize leaves by by analyzing their photosynthetic performance and carbohydrate and antioxidative metabolism, as well as the expression of defense-related genes.
View Article and Find Full Text PDFIdentification and Functional Analysis of the Gene Conferring Resistance to Late Blight () in Tomato.
Plants (Basel)
December 2024
State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Late blight is a destructive disease affecting tomato production. The identification and characterization of resistance (R) genes are critical for the breeding of late blight-resistant cultivars. The incompletely dominant gene confers resistance against the race T of in tomatoes.
View Article and Find Full Text PDFThe Crossregulation Triggered by Strains Is Strain-Specific and Improves Adaptation to Biotic and Abiotic Stress in Arabidopsis.
Plants (Basel)
December 2024
Faculty of Pharmacy, Universidad San Pablo-CEU Universities, 28668 Madrid, Spain.
Plants are sessile organisms that overcome environmental stress by activating specific metabolic pathways, leading to adaptation and survival. In addition, they recruit beneficial bacterial strains to further improve their performance. As plant-growth-promoting rhizobacteria (PGPR) are able to trigger multiple targets to improve plant fitness, finding effective isolates for this purpose is of paramount importance.
View Article and Find Full Text PDFTranslocation: A Common Tumor Driver of Distinct Human Neoplasms.
Int J Mol Sci
December 2024
School of Medicine and Dentistry, Faculty of Clinical and Biomedical Sciences, University of Central Lancashire, Preston PR1 2HE, UK.
Cancer is among the leading causes of mortality in developed countries due to limited available therapeutic modalities and high rate of morbidity. Although malignancies might show individual genetic landscapes, recurring aberrations in the neoplastic genome have been identified in the wide range of transformed cells. These include translocations of frequently affected loci of the human genetic material like the Ewing sarcoma breakpoint region 1 () of chromosome 22 that results in malignancies with mesodermal origin.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!