The Arabidopsis SENESCENCE-ASSOCIATED GENE 13 Regulates Dark-Induced Senescence and Plays Contrasting Roles in Defense Against Bacterial and Fungal Pathogens
| Autor: | Steven J. Klosterman, Irmak Erdem, Julie C. Caruana, Nikhilesh Dhar, Ramesh Raina, Krishna V. Subbarao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Plant senescence Hypersensitive response Senescence Programmed cell death biology Physiology Abiotic stress food and beverages General Medicine Biotic stress Plant disease resistance biology.organism_classification 01 natural sciences Cell biology 03 medical and health sciences 030104 developmental biology Arabidopsis Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Molecular Plant-Microbe Interactions®. 33:754-766 |
| ISSN: | 1943-7706 0894-0282 |
| DOI: | 10.1094/mpmi-11-19-0329-r |
| Popis: | SENESCENCE-ASSOCIATED GENE 13 (SAG13) of Arabidopsis is a widely conserved gene of unknown function that has been extensively used as a marker of plant senescence. SAG13 induction occurs during plant cell death processes, including senescence and hypersensitive response, a type of programmed cell death that occurs in response to pathogens. This implies that SAG13 expression is regulated through at least two different signaling pathways affecting these two different processes. Our work highlights a contrasting role for SAG13 in regulating resistance against disease-causing biotrophic bacterial and necrotrophic fungal pathogens with contrasting infection strategies. We provide further evidence that SAG13 is not only induced during oxidative stress but also plays a role in protecting the plant against other stresses. SAG13 is also required for normal seed germination, seedling growth, and anthocyanin accumulation. The work presented here provides evidence for the role of SAG13 in regulating multiple plant processes including senescence, defense, seed germination, and abiotic stress responses. SAG13 is a valuable molecular marker for these processes and is conserved in multiple plant species, and this knowledge has important implications for crop improvement. |
| Databáze: | OpenAIRE |
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