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

第一作者： Li, Ye-Fang

作者： Li, Ye-Fang;Guan, Wen-Ling;Li, Feng-Rong;Song, Jie

作者机构：

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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