关键词: 黄瓜, S–腺苷甲硫氨酸, 扦插, 根系发生, 生理代谢

Abstract: ‘Jinyan 4’cucumber was used as experimental material to study the effect of exogenous S-adenosylmethionine（SAM）on root generation，seedling growth and physiological metabolism. The results showed that the root growth，chlorophyll accumulation，photosynthetic rate were significantly improved in cucumber cutting seedlings treated with 50 μmol · L-1 SAM solution for 5 min，and N，P，K contents and cucumber seedlings growth were promoted. Further investigations indicated that SAM treatment up-regulated the expression of polyamines and auxin-related genes as well as polyamine and auxin accumulation in cucumber hypocotyls，which was the possible mechanism of SAM promoting root regeneration and plant growth of cucumber cutting seedlings.

Key words: cucumber, S-adenosylmethionine, cutting, root generation, physiological metabolism