Endogenous putrescine ( Put ), spermine (Spm) and spermidine ( Spd ) contents were increased at the early stage and then gradually declined during the culture course, these indexes reached their peaks on the 8th day of culture.

• 不定芽分化过程中外植体内源腐胺(Put)、精胺(Spm)和亚精胺(Spd)含量都表现为先上升后下降,均在培养第8d时达到峰值;