Choline monooxygenase(CMO)is the rate-limited enzyme in the pathway to synthesize betaine, therefore the CMO gene is regarded as the most hopeful one of stress-tolerance genes.

• 胆碱单加氧酶(CMO)是甜菜碱合成途径中的限速酶，它被认为是最有希望的抗逆基因之一。