硫腺苷甲氨酸(SAM)在多胺和乙 烯的生物合成中的枢纽地位 TRANSMETHYLATION PUT N-methyl-Put ALKALOIDS REACTIONS SAM ETHYLENE PUT SPD/SPM Fig.3.Pivotal role of SAM in the metabolic fluxes leading to transmethylation reactions and to the biosynthesis of ethylene, polyamines and putrescine-derived alkaloids. 果树毒业硕去生瀑醒a⊙引 果树专业硕士生课程-yao1 硫腺苷甲氨酸（SAM）在多胺和乙 烯的生物合成中的枢纽地位