摘要
以中华猕猴桃和美味猕猴桃果实为试材，研究果实成熟过程中内源ＡＢＡ、ＩＡＡ和乙烯的变化以及外源ＡＢＡ和ＩＡＡ处理对果实后熟软化进程的调控及其生理基础。结果表明，果实采后初期，ＡＢＡ含量迅速升高，在２～４ｄ达到最大值，之后快速下降；在ＡＢＡ下降过程中，乙烯进入跃变期，果实后熟进程加快；外源ＡＢＡ处理增加内源ＡＢＡ含量，加快内源ＩＡＡ的降解，促使脂氧合酶活性峰值提前出现，加速果实软化；果实后熟进程中，内源ＩＡＡ呈持续下降变化，外源ＩＡＡ处理促进了内源ＩＡＡ的积累，并推迟了内源ＡＢＡ峰值和脂氧合酶活性峰值的到来，延缓了果实的后熟软化。就ＡＢＡ和ＩＡＡ对猕猴桃果实后熟软化的调控机理进行了讨论。
Zaoxian(Actinidia chinensis)andHayward(Actinidia
deliciosa)kiwifruit cultivars were used to investigate the changes in the levels of endogenous
abscisic acid(ABA),indole3acetic acid(IAA)and ethylene and the effects of exogenous ABA,IAA
treatment on fruit softening and its control during the fruit ripening at 20.Endogenous ABA
accumulated at the beginning of fruit ripening and reached a peak on the 2nd and 4th day after
harvest inZaoxianandHaywardfruit,respectively,then went down accompanied by the onset of
climacteric ethylene production.The highest ethylene production occurred on the 8th
inZaoxianfruit and on the 14th day inHaywardfruit after harvest.Exogenous ABA treatment
promoted the increase in endogenous ABA content,quickened the degradation of endogenous
IAA,increased lipoxygenase activity and accelerated fruit ripening and softening.Endogenous
IAA content in the fruits of the two cultivars steadily declined during fruit ripening.Exogenous
application of IAA increased the content of endogenous IAA and delayed the peak appearances
of endogenous ABA and LOX activity and the processing of fruit ripening.It suggests that ABA
may play a more important role in the regulation of kiwifruit ripening compared with ethylene
after harvest.
出处
《园艺学报》
CAS
CSCD
北大核心
1999年第2期81-86,共6页
Acta Horticulturae Sinica
基金
国家自然科学基金
浙江省自然科学基金
农业部"九五"重点项目资助
关键词
ABA
IAA
猕猴桃
后熟
脂氧合酶
Abscisic acid
Indole3acetic acid
Kiwifruit
Ripening
Lipoxygenase
