风车草种子休眠及萌发特性研究  

Study on Dormancy and Germination Characteristics of Cyperus alternifolius Seeds

作　　者：李欣勇 黄迎 张静文 LI Xinyong;HUANG Ying;ZHANG Jingwen(Institute of Tropical Crops Genetic Resources,Chinese Academy of Tropical Agricultural Sciences,Danzhou Hainan Province 571737,China;Ministry of Education Key Laboratory for Ecology of Tropical Islands,College of Life Science,Hainan Normal University,Haikou Hainan Province 571158,China)

机构地区：[1]中国热带农业科学院热带作物品种资源研究所,海南儋州571737 [2]热带岛屿生态学教育部重点实验室,海南师范大学生命科学学院,海南海口571158

出　　处：《种子》2021年第5期57-62,共6页Seed

基　　金：海南省院士创新平台科研专项资助(YSPTZX 202020);滇桂黔石漠化地区特色作物产业发展关键技术集成示范项目;中国热带农业科学院基本科研业务费专项资金(1630032020025);国家自然科学基金项目(31802125)。

摘　　要：以风车草种子为材料,探讨了温度、光照、植物生长调节剂、水分、低温层积及人工老化处理对其休眠及萌发特性的影响。结果表明,风车草为萌发喜光性植物,适宜浅播,最佳萌发温度为20℃/35℃或25℃/35℃;风车草存在浅度生理休眠,赤霉素(GA_(3))、氟啶酮(FL)、褪黑素(MLT)和低温层积均可破除其休眠,显著提高种子萌发率(p<0.05);风车草种子萌发期的抗旱性较弱,在10%PEG胁迫后的种子萌发率已显著低于对照(p<0.05);风车草种子在人工老化24 h后萌发率显著下降,老化192 h后萌发率仅为25%,表明风车草种子抗老化能力较弱。In this paper,the effects of temperature,light,plant growth regulator,water,low temperature stratification and artificial aging on the dormancy and germination characteristics of Cyperus alternifolius seeds were studied.The results showed C.alternifolius was a light-loving plant at germination,suitable for shallow sowing,and the optimal germination temperature was 20℃/35℃or 25℃/35℃.There was shallow physiological dormancy in C.alternifolius,and gibberellin(GA_(3)),fluridone(FL),melatonin(MLT)and low temperature stratification could break dormancy and significantly increase seed germination rate(p<0.05).In the germination stage,the drought resistance of C.alternifolius seeds was weak and the seed germination rate under 10%PEG stress was significantly lower than that of the control(p<0.05).After artificial aging for 24 h,the germination rate of C.alternifolius seeds decreased significantly,and the germination rate was only 25%after aging for 192 h,indicating that the anti-aging ability of C.alternifolius seeds was weak.

关 键 词：种子休眠 萌发 植物生长调节剂 低温层积 种子老化 

分 类 号：Q945.34[生物学—植物学]