细胞分裂素类生长调节剂对青花菜采后衰老的影响  

Effects of Cytokinin Growth Regulators on Senescence of Harvested Broccoli(Brassica oleracea L. var. italica) Florets

作　　者：王云莉[1] 王成荣[1] 王然[1] 杨绍兰[1] 刘宪路[1] 

机构地区：[1]青岛农业大学园林园艺学院,山东青岛266109

出　　处：《园艺学报》2009年第11期1619-1626,共8页Acta Horticulturae Sinica

基　　金：山东省自然科学基金项目(Y-2002-D-04);青岛市自然科学基金项目(06-2-2-15-jch)

摘　　要：以青花菜‘绿皇后’品种为试材,研究了25℃条件下细胞分裂素类生长调节剂KT、6-BA和CPPU对延缓青花菜采后衰老的效果。结果表明:3种细胞分裂素类生长调节剂处理均在不同程度上延缓了青花菜花蕾黄化和叶绿素分解,推迟了呼吸和乙烯跃变峰出现的时间,降低了峰值,并维持了细胞膜稳定性。内源激素测定结果表明,6-BA和CPPU处理使青花菜花蕾在试验的前期阶段(12～84h)一直保持相对较高的内源IAA和GA水平,相对较低的内源ABA水平。3种细胞分裂素类生长调节剂以CPPU延缓青花菜衰老效果最为明显,其次是6-BA,KT效果最弱。延缓青花菜采后衰老效果随着处理的浓度增加而增加,以40mg·L-1CPPU延缓青花菜衰老效果最佳。Application of cytokinin growth regulators,KT （Kinetin）,6-BA （Benzyladenine）,and CPPU [N-（2-chloro-4-pyridyl）-N＇-pheuylurea] on delaying senescence of harvested broccoli florets was studied. The results showed that use of KT,6-BA or CPPU on harvested broccoli delayed floret yellowing and chlorophyll degradation,decreased respiration and ethylene production rate,postponed climacteric time,and retarded membrane permeability loss. The content of endogenous ABA was lower and the levels of IAA and GA were higher in the broccoli treated with 6-BA and CPPU than those in the control during 12-84 h. The treated effects enhanced with increasing concentration in the study. The CPPU treatment （40 mg·L^-1） was most effective in delaying the broccoli yellowing,followed by 6-BA and KT.

关 键 词：青花菜 内源激素 细胞分裂素 衰老 

分 类 号：S635[农业科学—蔬菜学]