毛萼紫薇种子的储存及萌发特性  

Seed Storage and Germination Characteristics of Lagerstroemia balansae in Hainan Island

作　　者：蒙真铖 罗冠勇[2] 宋希强[1] 徐诗涛[3] 

机构地区：[1]海南大学园艺园林学院/热带作物种质资源保护与开发利用教育部重点实验室,海南海口570228 [2]中国热带农业科学院热带生物技术研究所/农业部热带作物生物学与遗传资源利用重点实验室,海南海口571101 [3]海南大学儋州应用科技学院,海南儋州571737

出　　处：《热带生物学报》2014年第4期348-351,共4页Journal of Tropical Biology

基　　金：林业公益性行业科研专项(201204604);海南省重点科技计划项目(ZDXM 20120004)

摘　　要：通过观测毛萼紫薇（Lagerstroemia balansae）的种子生物学特性、种子生活力,研究储存方法、时间和生长调节剂处理对种子萌发率和发芽势的影响。结果表明：（1）毛萼紫薇种子透水性较好,具有一定的生理后熟现象;（2）种子不宜即采即播,新鲜种子短期储存宜在4℃下低温保存,储存期达6~8个月;种子干燥后,在常温条件下可长期保存;（3）毛萼紫薇种子具有一定休眠现象。GA3、IAA能有效地打破休眠,200 mg·L-1GA3处理的种子发芽率和发芽势最高,其次是200 mg·L-1IAA处理的,6-BA处理的无明显效果。Lagerstroemia balansae produces a large number of seeds in the wild but its ornamental utilization was hindered due to low rate of seed germination. The seeds collected were stored and germinated with plant growth regulators to observe their storage and germination. The seeds were found to have good water permeability but had a phenomenon of physiological ripening. L. balansae seeds should not be sown immediately after harvest.They needed a short-term storage at a low temperature of 4 ℃,and their best shelf life was 6 to 8 months. The seeds can be dry stored for a long time at an ambient temperature. They tended to have certain physiological dormancy. GA3 and IAA could effectively break its physiological dormancy. The seeds treated with GA3 at a rate of200 mg·L- 1had higher germination rates and their seedlings grew better,followed by the seeds treated with IAA treatment at a rate of 200 mg·L- 1. 6- BA had no effect on germination of the seeds.

关 键 词：毛萼紫薇 种子活力 生长调节剂 发芽势 生理后熟 

分 类 号：S604[农业科学—园艺学]