| 摘要: |
| [目的]探讨外源ABA对仁用杏花期抗寒力的影响.[方法]以8年生仁用杏为材料,自来水为对照,在仁用杏花芽膨大期喷施18 mg/L ABA后,分别测定花蕾、花朵和幼果的抗寒力及相关生理指标.[结果]与对照相比,花芽膨大期喷施18 mg/L ABA,可降低仁用杏花蕾,花朵和幼果的电解质渗出率,且在较低温度下效果尤其显著;可使半致死温度分别降低2.73,1.73和0.38℃;MDA含量分别降低37.76%,55.1%和45.41%;SOD酶活性分别提高2.3%,9.9%和0.7%;POD酶活性分别提高9.0%,0.7%和3.4%;可溶性糖含量分别提高6.5%,15.24%和12.3%;内源ABA含量分别提高275%,61.7%和8.3%;使ABA/GA3.维持较高水平.[结论]花芽膨大期喷施18 mg/L ABA,可在不影响仁用杏花蕾、花朵和幼果发育进程的情况下,提高仁用杏花期的抗寒力. |
| 关键词: ABA 仁用杏 花期 抗寒力 |
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| 基金项目:国家“十一五”科技支撑项目（2006BAD18B0201）；陕西省重大科技专项计划项目(2006kz09-G6） |
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| Effect of exogenous ABA on cold-resistant ability and related physiological indicators of almond-apricot during blossom period |
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| Abstract: |
| 【Objective】 This paper studied the effects of exogenous ABA on cold-resistance of almond-apricot during blossom period.【Method】 Taking 8-year-old almond-apricot as the material,running water as comparison,the cold-resistance and related physiological targets of the flower bud,flowers and young fruit's were determined respectively after spraying 18 mg/L ABA during the swelling-time of flower bud.【Result】 Compared to control,the results showed that the treatment could decrease the electrolyte osmotic rates of flower buds,flowers and young fruits,especially in lower temperature.It could also decrease the semi-lethal temperature by 2.73,1.73,0.38 ℃ and MDA content by 37.76%,55.1%,45.41% respectively,while the activity of SOD was enhanced by 2.3%,9.9%,0.7% and the activity of POD was enhanced by 9.0%,0.7%,3.4% respectively.Soluble sugar was increased by 6.5%,15.24%,12.3% and endogenous ABA content was increased by 275%,61.7%,8.3% respectively.The treatment could keep a higher ratio of ABA/GA3.【Conclusion】 Spurting 18 mg/L ABA during the swelling-time could enhance the cold-resistance of almond-apricot during blossom period in the situation of not affecting flower bud,flowers and young fruit development of almond-apricot. |
| Key words: ABA almond-apricot blossom period cold-resistant ability |
