植物生长调节剂对毛萼紫薇种子萌发及幼苗生长的影响  

Effect of Plant Growth Regulators on Seed Germination and Seedlings Growing of Lagerstroemia balansae(Lythraceae)

作　　者：蒙真铖 丁琼[2] 宋希强[1,2] 罗冠勇[3] 徐诗涛[1,4] 

机构地区：[1]海南大学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]海南大学园艺园林学院,海南海口570228 [2]海南大学园艺园林学院,海南海口570228 [3]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 [4]海南大学儋州应用科技学院,海南儋州571737

出　　处：《热带作物学报》2014年第9期1791-1794,共4页Chinese Journal of Tropical Crops

基　　金：海南省中西部高校提升综合实力工作资金项目;林业公益性行业科研专项(No.201204604)

摘　　要：自然条件下毛萼紫薇Lagerstroemia balansae结实率很高,但自然萌发率和成苗率极低.适合的植物生长调节剂处理种子,能够有效打破种子休眠、有效促进幼苗生长.本研究采用TTC染色法测定毛萼紫薇种子的生活力,比较5种植物生长调节剂GA3、TDZ、IAA、6-BA和NAA处理下毛萼紫薇种子的发芽率、发芽势及对幼苗生长的影响.结果表明：（1）毛萼紫薇种子生活力较低;（2）200 mg/L GA3处理的种子发芽势,发芽率较高,幼苗长势良好;其次是0.02 mg/L的TDZ处理,再次是200 mg/L IAA的处理;（3） 1-20 mg/L的6-BA和NAA处理对毛萼紫薇种子的萌发无促进作用.上述结果表明：GA3、TDZ、IAA能有效促进毛萼紫薇种子的萌发及幼苗生长.Ornamental utilization of Lagerstroemia balansae is hindered due to low seed percentage germination with low seedling percentage though it produces large amount of seed in the wild.We can effectively break seed dormancy and promote seedling growth effectively after treating the seeds with suitable plant growth regulator.In this paper,the seeds vigor were determined by TTC staining method,and were soaked in different growth regulators,GA3,TDZ,IAA,6-BA and NAA of various concentrations to evaluate the effect on germination rate,seedling height and the number of lateral root.The results showed that：（1） The seed vigor of L.ba/ansae was very low; （2） We treated the seeds with 200 mg/L GA3 to study the germination potential and found out that germination rate was higher and seedling growing better; followed by 0.02 mg/L TDZ treatment and by,200 mg/L IAA treatment successively; （3） The effect of 6-BA and NAA treatment ranging from 1 mg/L to 20 mg/L on seed germination was not significant.GA3,TDZ,IAA could effectively promote the seed germination and seedling growth of L.balansae.

关 键 词：毛萼紫薇 TTC 发芽势 种子活力 

分 类 号：S604[农业科学—园艺学]