【作者】 贾永华；

【导师】 王飞；

【作者基本信息】 西北农林科技大学 ， 果树学， 2006， 硕士

【摘要】 随着生活水平的提高,人们对花卉的需求日益增加,开展花卉种子休眠特性和提高发芽率的研究对我国花卉产业发展具有重要的理论和实践指导意义。本研究以马蔺、薰衣草、跳舞草和多叶羽扇豆四种花卉种子为材料,分析了种子的休眠原因并采取相应措施促进种子萌发,测定了种子经不同处理萌发过程中一些生理生化变化。取得的主要研究结果如下:1.通过对种子种皮透水性和种皮及胚乳浸提液的生物测定,可以判断出,马蔺和薰衣草种子属于深度的综合休眠,跳舞草和多叶羽扇豆种子休眠都在于种皮障碍。2.解除种皮障碍中浓硫酸比氢氧化钠效果好,但要掌握好处理温度和处理时间。3.种子萌发期间,脂质过氧化产物MDA含量降低,SOD、POD、CAT三种抗氧化保护酶活性升高,种子的贮藏物质降解利用,为胚的生长提供了大量的物质和能量。经过GA3或PEG处理的种子,加快了萌发代谢的各种生理生化进程,提高了种子的活力。4.马蔺、薰衣草、跳舞草和多叶羽扇豆种子用不同的处理方法最终的发芽率分别达到90.3%、99%、98%、92.3%,接近或达到了种子的生活力,种子休眠的解除及发芽率提高的问题得以解决。更多还原

【Abstract】 As living standards improved and people’s demand for flowers increased, studies on characteristics of flower seeds dormancy and improving the germination rate of flower seeds would make progress in the flower development in our country. Taking Iris lacteal、Lavandula angustifolia、Cobariocalyx matorius and Lupinus polyphyllus as material, we studied the reason of dormancy and took measures to accelerate the germination of seeds and investigated the physiological and biochemical changes during the course of germination after different treatments. The main results were as follow:1. The results of water absorption of seeds coat and the biotic measurement results of the extract solution of seeds coat and albumen showed that Iris lactea and Lavandula angustifolia seeds belonged to a type of comprehensive deep dormancy ,and seed dormancy of Cobariocalyx matorius and Lupinus polyphyllus was due to the barrier of seed coat.2. With suitable treated temperature and treated time, concentrated sulphuric acid had better effect on the breaking of coat obstacle than Sodium Hydroxide.3. During the course of seed germination, MDA content reduced, three protection enzymes(SOD, POD, CAT) activity enhanced, seed storage material degraded, and the degradation provided quantitative materials and energy for the germ growth. With the treatment of either GA3 or PEG would accelerate the physiological and biochemical process of seed germination and increase the seed vigor.4. Terminal germination percentages of Iris lactea, Lavandula angustifolia , Cobariocalyx matorius and Lupinus polyphyllus were 90.3%,99%,98%,92.3% with different methods respectively, which closed to or reached viability of the seeds. The problems to break the dormancy of seeds and to improve germination percentage were solved.更多还原