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Rice OsRACK1A Gene Negatively Regulates Salt Tolerance
Posted by: Prof. Dr. M. Raupp (IP Logged)
Date: August 23, 2018 07:55AM

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.


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