青阳参种子的萌发(英文)  

Seeds Germination of Cynanchum otophyllum (Asclepiadaceae) Endemic to China

作　　者：王定康[1,2] 孙桂芳[3] 翟书华[2] 岑晓江[2] 赵剑 萧凤回[1] 

机构地区：[1]云南农业大学中药材研究所云南省中药材规范化种植技术指导中心,云南昆明650201 [2]昆明学院生物系,云南昆明650031 [3]昆明医学院技能中心,云南昆明650031 [4]昆明市第十四中学,云南昆明650106

出　　处：《云南植物研究》2009年第2期173-177,共5页Acta Botanica Yunnanica

基　　金：教育部科学技术研究重点项目(209115);云南省应用基础研究计划项目(2007C262M);云南省教育厅科研基金重点项目(07Z10351)

摘　　要：青阳参(Cynanchum otophyllum)种子在11月成熟时有休眠习性。收获后将其种子种植在自然温室内,到第二年的春天种子才会萌发,且大多数种子在3月28至4月4日间萌发,这期间的日平均最高和最低温度分别为19.0℃和9.9℃。层积能有效地打破青阳参种子的休眠,休眠种子通过大约1周的层积便能萌发。种子在有光的条件下层积1周后转移到25/15℃的黑暗条件下萌发率可达到75.4%。青阳参种子不论在有光的条件下还是在黑暗环境中层积2～3周后转入30/20和25/15℃进行变温处理,其萌发率最低能达到66.4%,而转入20/10℃变温处理其萌发率最多只能达到20.1%,但若层积6周,即便在20/10℃变温处理的情况下其萌发率也可以达到65.3%以上。Intact seeds of Cynanchum otophyllum were innately dormant at maturity in November. Seeds planted in a nonheated greenhouse in November germinated the following spring and most of the germination occurred between 28 March - 4 April, when the mean maximum and minimum daily temperatures were 19.0 and 9.9℃, respectively. Stratification was effective in overcoming dormancy, and nondormant seeds germinated in beth light and darkness. About one week of stratification was effective in overcoming dormancy in some of the seeds; seeds stratified in light for 1 week and then incubated in darkness at 25/15℃ germinated to 75.4%. Seeds stratified in light or darkness for 2 and 3 weeks and then incubated in light or darkness germinated to 66.4% or more at thermoperiods of 30/20 and 25/15℃ but germinated to 20.1% or less at 20/10℃. Seeds stratified for 6 weeks also germinated to high percentages （65.3% or more） at 20/10℃.

关 键 词：青阳参 萌发 种子 层积 温度 

分 类 号：S567.53[农业科学—中草药栽培]