东方百合鳞茎冷藏解除休眠的养分代谢和酶活性变化  

Changes of Carbohydrates Metabolism and Enzymes Activities in Low Temperature Storage for Bulbs of Lilium Oriental Hybrids

作　　者：夏宜平[1] 黄春辉[1] 何桂芳[1] 郑慧俊[1] 

机构地区：[1]浙江大学农业与生物技术学院园艺系,浙江杭州310029

出　　处：《园艺学报》2006年第3期571-576,共6页Acta Horticulturae Sinica

基　　金：国家自然科学基金项目(30371188)

摘　　要：以自繁的东方百合鳞茎为材料,研究在2℃、5℃和8℃条件下,鳞片中淀粉、可溶性总糖、还原糖含量和几种酶活性的变化。在8周的冷藏期内,淀粉含量持续明显下降,可溶性糖和还原糖含量增加,CAT、POD、SOD酶的活性在冷藏第1周下降极显著,而α-淀粉酶活性在第3周出现峰值,自冷藏第4周后4种代谢酶活性均处于低水平。本试验中,不同低温处理间的差异不大,冷藏第7周后可解除休眠。Carbohydrate contents and related enzymes activities were performed to investigate the effect of low temperature storage on the bulbs＇ dormancy of Oriental Lily ‘Sorbonne＇. Bulbs were stored in moist peat moss for 8 weeks at 2℃, 5℃ and 8℃, respectively. The starch contents decreased continuously in interior and exterior scales, while the contents of total soluble carbohydrates and reducing sugar were increased. Activities of CAT, POD and SOD declined significantly, especially in the first week of cold storage. A peak value in α-amylase activity appeared in the 3^rd week. Low activity levels of all enzymes presented after the 4^th week. The results indicated that no obvious difference between the three low temperatures, and overcoming dormancy in bulbs of oriental lily ‘Sorbonne＇ started in the 7^th week.

关 键 词：东方百合 鳞茎 冷藏 解除休眠 养分代谢 酶活性 

分 类 号：S682.2[农业科学—观赏园艺]