KT对月季切花花瓣衰老生理的调节研究

Regulation of KT on Senescence Physiology in Cut Rose Petals

以月季"卡罗拉"品种切花为材料,采用室内瓶插法,在以常规保鲜液作为对照的基础上,分别添加不同浓度(30、60、100mg·L-1)的激动素(KT)进行处理,测定了整个花期花瓣中一些与衰老相关的生理生化变化.结果表明,KT能提高花瓣中超氧化物歧化酶(SOD)和过氧化物酶(POD)活力,降低超氧阴离子(O2.-)产生速率以及花瓣浸出液的相对电导率(REC),诱导POD同功酶的表达,从而延缓了切花的衰老,其中以60mg·L-1 KT处理的效果最好.

The cut rose ＂Carola＂ were respectively handled with different concentrations（30, 60, 100 mg·L^-1） of Ki netin（KT）, and with antistaling agent as control. Some physiological and biochemical indices were measured in petals of cut rose in the entire florescence. The results showed that KT can enhance the activity of SOD and POD and decrease O2- production rate and relative electrical conductivity of petals exudate, and induce expression of POD isoenzyme. Thereby KT can delay the senescence of petal, and 60 mg· L^-1 KT is the best concentration.