低温对鲜核桃贮藏效果及胚芽内源激素变化的影响  

Effect of Lowtemperature on Preservation and Variation of Endogenous Hormones in Embryo of Fresh Walnut

作　　者：马艳萍[1] 吕新刚[1] 马惠玲[1] 费昭雪[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100

出　　处：《北方园艺》2013年第5期134-138,共5页Northern Horticulture

基　　金：国家自然科学基金资助项目(31200518);陕西省自然科学基金资助项目(2011JQ3002);西北农林科技大学基本科研基金资助项目(QN2011014)

摘　　要：以"辽宁4号"鲜核桃为试材,研究了常温(20±3)℃和低温(0±1)℃下核桃的贮藏效果,测定其胚芽中内源激素脱落酸(ABA)、赤霉素(GA3)、生长素(IAA)和玉米素核苷(ZR)的含量及其与ABA比值的变化规律。结果表明:鲜核桃在常温下20d萌发,5d开始发霉,低温下贮藏120d仍未发芽;低温贮藏的鲜核桃胚芽中ABA的较高含量,却极显著抑制了GA3、IAA、ZR的含量和w(IAA)/w(ABA)、w(ZR)/w(ABA)的比值,对w(GA3)/w(ABA)影响不显著。表明低温主要通过保持鲜核桃中较高的萌发抑制物质,抑制其萌发促进物质来实现对鲜核桃较好的贮藏效果。Taking ＇Liaoning 4＇ fresh walnut as material,the preservation effect of walnut at （20±3）℃ and （0±1）℃ were studied,and endogenous hormones of ABA,GA3 ,IAA and ZR content in embryo were detected,and variation with ABA. The results showed that the embryo sprouted on 20 d and mildew at 5 d at （20±3）℃ ,but there was no germination in the 120 d storage period at the temperature of （0± 1）℃;at the same time,the low temperature maintained the high content of ABA and restrained highly significantly the content of GA3, IAA, ZR and the ratios of w（IAA）/w（ABA）, w（ZR）/w（ABA） ,and the ratio of w（GA3 ）/w（ABA） was not significantly affected. The results indicated that low temperature mainly kept inhibitory substances high and decreased the content of the growth-promoting substance. Therefore, low temperature produced significant preservation effect on the fresh walnut.

关 键 词：低温 贮藏效应 内源激素 鲜核桃 

分 类 号：S664.1[农业科学—果树学]