Morphophysiological dormancy synchronizes timing of seed germination of two alpine species of Meconopsis on the Tibetan Plateau to beginning of growing season
文献类型：期刊论文
| 作者 | Wang, Guoyan3,5; Baskin, Carol C.; Baskin, Jerry M.; Yang, Xuejun; Liu, Guofang; Ye, Xuehua; Huang, Zhenying |
| 刊名 | ENVIRONMENTAL AND EXPERIMENTAL BOTANY
 |
| 出版日期 | 2021 |
| 卷号 | 187 |
| ISSN号 | 0098-8472 |
| 关键词 | Buried seeds Dispersal time Dormancy cycling Meconopsis Secondary dormancy Underdeveloped embryo |
| DOI | 10.1016/j.envexpbot.2021.104473 |
| 文献子类 | Article |
| 英文摘要 | Timing of seed germination is critical for seedling establishment and growth of the plant to maturity. Theoretically, then, germination of alpine species should be restricted to a period that ensures seedlings will reach a critical size during the short growing season for overwinter survival. We hypothesized that seeds of two alpine monocarpic perennials of Meconopsis germinate only at the beginning of the growing season in early spring and that dormancy synchronizes the timing of germination to this period. We tested the effects of light, temperature, cold stratification and GA3 on germination of Meconopsis integrifolia and M. racemosa in the laboratory and germination responses to temperature during two 2-year periods of seed buried at 4450 m a.s.l. on the Tibetan Plateau. Most fresh seeds of both species were dormant, and the embryo underdeveloped, indicating morphophysiological dormancy (MPD). GA3 promoted embryo growth and germination of seeds. Buried seeds exhibited an annual dormancy cycle. The physiological component of MPD was released gradually in the field during autumn and winter, resulting in embryo growth (release of morphological component of MPD) and germination just after snowmelt in spring. Embryos in seeds that did not germinate the first year remained underdeveloped until the second spring. Delay of seed burial from October until January (simulating a delay in time of seed dispersal) delayed germination for 1 year but did not change the germination season. Thus, our hypothesis that MPD restricts germination to the beginning of the growing season is supported. |
| 学科主题 | Plant Sciences ; Environmental Sciences |
| 电子版国际标准刊号 | 1873-7307 |
| 出版地 | OXFORD |
| WOS关键词 | ENDANGERED HIMALAYAN ; ECOPHYSIOLOGY ; REQUIREMENTS ; TEMPERATURE ; RECRUITMENT ; POPPY ; SOIL |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000651248600006 |
| 资助机构 | National Natural Science Foundation of P. R. China [31861143024, 31870711, 31860123] ; Second Tibetan Plateau Scientific Expedition and Research Program of P. R. China [2019QZKK0301] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/26669]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Tibet Agr & Anim Husb Univ, Coll Resource & Environm, Linzhi 860000, Tibet, Peoples R China 2.Baskin, Carol C.; Baskin, Jerry M.] Univ Kentucky, Dept Biol, Lexington, KY 40506 USA 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 4.Baskin, Carol C.] Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA 5.Chengdu Univ Technol, Inst Ecol Resources & Landscape Architecture, Chengdu 610051, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Guoyan,Baskin, Carol C.,Baskin, Jerry M.,et al. Morphophysiological dormancy synchronizes timing of seed germination of two alpine species of Meconopsis on the Tibetan Plateau to beginning of growing season[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2021,187. |
| APA | Wang, Guoyan.,Baskin, Carol C..,Baskin, Jerry M..,Yang, Xuejun.,Liu, Guofang.,...&Huang, Zhenying.(2021).Morphophysiological dormancy synchronizes timing of seed germination of two alpine species of Meconopsis on the Tibetan Plateau to beginning of growing season.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,187. |
| MLA | Wang, Guoyan,et al."Morphophysiological dormancy synchronizes timing of seed germination of two alpine species of Meconopsis on the Tibetan Plateau to beginning of growing season".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 187(2021). |
入库方式： OAI收割
来源：植物研究所
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