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Regulation of betaine synthesis by precursor supply and choline monooxygenase expression in Amaranthus tricolor
Journal of Experimental Botany
In plants, betaine is synthesized upon abiotic stress via choline oxidation, in which choline monooxygenase (CMO) is a key enzyme. Although it had been thought that betaine synthesis is well regulated to protect abiotic stress, it is shown here that an exogenous supply of precursors such as choline, serine, and glycine in the betaine-accumulating plant Amaranthus tricolor further enhances the accumulation of betaine under salt stress, but not under normal conditions. Addition of isonicotinicdoi:10.1093/jxb/erm278 pmid:18182425 fatcat:n6azyqkzbvbhbdpbcnfdzwiypm