Integrative Biology Journals
Plant Diversity

Plant Diversity ›› 2009, Vol. 31 ›› Issue (02): 173-177.DOI: 10.3724 SP.J.1143.2009.07330

• Articles • Previous Articles     Next Articles

Seeds Germination of Cynanchum otophyllum (Asclepiadaceae) Endemic to China

WANG Ding-Kang1 , 2 , SUN Gui-Fang3 , ZHAI Shu-Hua2 , CEN Xiao-Jiang2   

  1. 1 Institute of Chinese Medicinal Materials of Yunnan Agricultural University, Yunnan Provincial Center for Chinese Medicinal Material GAP Technology , Kunming 650201, China ; 2 Biology Department , Kunming University , Kunming 650031, China ; 3 Skill Center, Kunming Medical College, Kunming 650032 , China; 4 Kunming No . 14 Middle School , Kunming 650106 , China
  • Received:2008-08-11 Online:2009-04-25 Published:2009-04-25

青阳参种子的萌发

王定康1 , 2 , 孙桂芳3 , 翟书华2 , 岑晓江2 , 赵 剑4 , 萧凤回1   

  1. 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

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Abstract: 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 both 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℃.

Key words: Cynanchum otophyllum

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。

关键词: 青阳参, 萌发, 种子, 层积, 温度

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