Seed dormancy and germination in Cardiocrinum giganteum var. yunnanense, a perennial herb in China with post-dispersal embryo growth
文献类型： 外文期刊
作者： Li, Ye-Fang 1 ; Song, Jie 2 ; Guan, Wen-Ling 1 ; Li, Feng-Rong 1 ;
作者机构： 1.Yunnan Agr Univ, Fac Hort & Landscape, Kunming 650201, Yunnan, Peoples R China
2.Yunnan Acad Agr Sci, Flowers Res Inst, Kunming 650204, Yunnan, Peoples R China
关键词： Cardiocrinum giganteum var. yunnanense; embryo development; morphophysiological dormancy; seed germination; temperature requirement
期刊名称：SEED SCIENCE AND TECHNOLOGY （ 影响因子：0.905； 五年影响因子：0.996 ）
ISSN： 0251-0952
年卷期： 2020 年 48 卷 2 期
页码：
收录情况： SCI
摘要： Seeds of Cardiocrinum giganteum var. yunnanense, which is native to China, has underdeveloped embryos when dispersed from parent plants that did not grow until the second autumn and winter after exposure to summer temperatures. Radicles and cotyledons emerged in late winter and spring. Thus, a 15-16 month period was required from dispersal to seed germination. Under laboratory conditions, this period could be shortened to 5-6 months in a 25 degrees C/15 degrees C (60 days) -> 15 degrees C/5 degrees C (60 days) -> 5 degrees C (60 days) temperature sequence. Based on dormancy-breaking requirements, the seeds have deep simple morphophysiological dormancy (MPD). This is practical knowledge for propagation of the species from seeds.
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