摘要
细胞分裂素(KT)可延缓离体魔芋叶片的衰老,表现为叶绿素、蛋白质和RNA 含量的降低较对照(H_2O)缓慢;而脱落酸(ABA)则加速了离体叶片的衰老。衰老叶片中叶绿素a、b 和蛋白质含量明显低于正常叶,脂质过氧化产物积累量也较正常叶多55.13%,但衰老叶片中过氧化氢酶和类胡萝卜素等活性氧清除剂减少。
KT treatments of konjac(Amorphallus rivieri Durieu)leaf discs in vitro slowed down their senescence,the speed of decline in the contents of chlorophyll,protein and RNA being lower than that in thecontrol(H_2O treatment).In contrast,ABA speeded up the senescence of the leaf discs in vitro,viz.itaccelerated the decline of chlorophyll,protein and RNA.A comparison of senescent in vitro konjacleaves with non—senescent ones indicated that the contents of chlorophylls a and b and protein in thesenescent leaves were significantly lower than those in the non—senescent leaves,MAD accumulationwas 55.13% higher in the senescent leaves,while the active oxygen scavengers(catalase andcaroteinoid)were decreased.
出处
《西南农业大学学报（自然科学版）》
CSCD
1991年第3期313-316,共4页
Journal of Southwest Agricultural University
基金
国家自然科学基金
关键词
魔芋
叶片
衰老
Amozphopallus rivieri Durieu
senescence
leaf
