低温对桃果实采后冷害及其内源激素的影响  

Effects of Low Temperature Storage on Chilling Injure and Endogenous Hormones of Postharvest Peach Fruit

作　　者：陈伟[1] 苏新国[2] 郜海燕[3] 杨震峰[1] 

机构地区：[1]浙江万里学院生物与环境学院,浙江宁波315100 [2]广东食品药品职业学院食品科学系,广东广州510520 [3]浙江省农业科学院食品研究所,浙江杭州310021

出　　处：《核农学报》2013年第8期1173-1178,共6页Journal of Nuclear Agricultural Sciences

基　　金：中国博士后科学基金项目(2012M511847);浙江省重点科技创新团队项目(2011R09036-01);广东省高层次人才项目(2011-137)

摘　　要：研究了燕红水蜜桃果实低温(0℃)贮藏期间果实冷害和内源激素的变化规律。结果表明,20℃贮藏期间,内源乙烯和脱落酸含量出现跃变高峰,果实硬度快速下降,出汁率提高,果实正常后熟软化。桃果实采后0℃贮藏期间硬度下降缓慢,脯氨酸大量积累,果实冷害发生严重。0℃贮藏的桃果实冷害指数与GA3、IAA和ABA含量呈显著正相关,相关系数R2分别为0.994、0.848和0.734,而与果实内源乙烯含量相关性较低。果实0℃低温贮藏14d后ABA水平的降低抑制了果实内源乙烯的积累。同时,IAA和GA3水平的下降导致果实内源激素失衡,诱发果实细胞衰老发生,从而促进果实低温贮藏期间冷害的发生。The changes of chilling injure incidence and endogenous hormones of Yanhong peach fruit stored at 0℃ was investigated.Results showed that,fruit stored at 20℃ showed climatic changes of endogenous ethylene and abscisic acid contents associated with the decrease of fruit firmness and increase of extractable juice rate.However,fruit firmness decreased slightly and chilling injure increased extremely with the significantly accumulation of proline as fruit stored at 0℃.Fruit chilling injure index was significantly and positively correlated with endogenous gibberellin,3-indoleacetic acid and abscisic acid levels,and the correlation coefficient was 0.994,0.848,and 0.734,respectively.The decrease of abscisic acid content in fruit stored at 0℃ after 14 days inhibited ethylene production,but no significant correlation was observed between fruit chilling injure and ethylene production.Combined with the decrease of gibberellin and 3-indoleacetic acid,these results suggest the unbalance of endogenous hormones promoting senescence development and stimulating chilling injure incidence in postharvest peach fruit during cold storage.

关 键 词：桃果实 冷害 内源激素 絮败 

分 类 号：S662.1[农业科学—果树学]