OsMADS26 Negatively Regulates Resistance to Pathogens and Drought Tolerance in Rice.


Functional analyses of MADS-box transcription factors in plants have unraveled their role in major developmental programs (e.g. flowering and floral organ identity) as well as stress-related developmental processes, such as abscission, fruit ripening, and senescence. Overexpression of the rice (Oryza sativa) MADS26 gene in rice has revealed a possible function related to stress response. Here, we show that OsMADS26-down-regulated plants exhibit enhanced resistance against two major rice pathogens: Magnaporthe oryzae and Xanthomonas oryzae. Despite this enhanced resistance to biotic stresses, OsMADS26-down-regulated plants also displayed enhanced tolerance to water deficit. These phenotypes were observed in both controlled and field conditions. Interestingly, alteration of OsMADS26 expression does not have a strong impact on plant development. Gene expression profiling revealed that a majority of genes misregulated in overexpresser and down-regulated OsMADS26 lines compared with control plants are associated to biotic or abiotic stress response. Altogether, our data indicate that OsMADS26 acts as an upstream regulator of stress-associated genes and thereby, a hub to modulate the response to various stresses in the rice plant.

DOI: 10.1104/pp.15.01192

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@article{Khong2015OsMADS26NR, title={OsMADS26 Negatively Regulates Resistance to Pathogens and Drought Tolerance in Rice.}, author={Giang Ngan Khong and Pratap Kumar Pati and Fr{\'e}d{\'e}rique Richaud and Boris Parizot and Przemyslaw Bidzinski and Chung Duc Mai and Martine B{\`e}s and Isabelle Bourri{\'e} and Donaldo Meynard and Tom Beeckman and Michael Gomez Selvaraj and Ishitani Manabu and Anna-Maria Genga and Christophe Brugidou and Vinh Nang Do and Emmanuel Guiderdoni and Jean-Benoit Morel and Pascal P Gantet}, journal={Plant physiology}, year={2015}, volume={169 4}, pages={2935-49} }