Acts as negative regulator of cold tolerance. Negatively regulates beta-amylase genes at the transcriptional level in response to cold stress. Suppresses beta-amylase gene expression by interacting with TIFY11A/JAZ9. Maltose produced by beta-amylases has a role in protecting cell membranes under cold stress conditions in rice and may contribute to the cold tolerance as a compatible solute. Interacts with TIFY11A/JAZ9. Induced by cold stress and flooding. No visible phenotype under normal growth conditions, but mutant plants exhibit increased tolerance to cold stress.