Rice OsRACK1A Gene Negatively Regulates Salt Tolerance

The receptor for activated C kinase 1 (RACK1) is a protein involved in multiple signaling pathways. Yangzhou University's Dongping Zhang, together with researchers from various Chinese universities, studied the rice RACK1A (OsRACK1A) to learn its role in salt stress response.

Analysis showed the OsRACK1A follows a rhythmic expression pattern under circadian conditions. Suppression of OsRACK1A resulted in enhanced tolerance to salt stress. OsRACK1A-suppressed transgenic rice also accumulated more abscisic acid (ABA) and had upregulated ABA- and stress-inducible genes. Furthermore, researchers found that the OsRACK1A protein interacts with many salt stress-responsive proteins directly.

These results suggest that OsRACK1A is regulated by circadian rhythm, and involved in the regulation of salt stress responses.

For more information, read the article in Rice.


This article is part of the Crop Biotech Update, a weekly summary of world developments in agri-biotech for developing countries, produced by the Global Knowledge Center on Crop Biotechnology, International Service for the Aquisition of Agri-Biotech Applications SEAsiaCenter (ISAAA)

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