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题名: Seed dormancy and germination of Michelia yunnanensis (Magnoliaceae)
作者: Han, Chun-Yan1, 2; Welbaum, Gregory3; Long, Chun-Lin1, 4
刊名: SCIENTIA HORTICULTURAE
关键词: Embryo development ; GA(3) ; Cold stratification ; Morphophysiological dormancy
英文摘要: Michelia yunnanensis Franch. is a Chinese endemic ornamental shrub with potential for greater utilization as a landscape and medicinal plant if propagation was less difficult. Seed development and breaking of seed dormancy were investigated to improve propagation of M. yunnanensis. No fresh seeds germinated when tested at the time of dispersal. Newly matured seeds of M. yunnanensis contained differentiated linear underdeveloped embryos that were physiologically dormant. The embryo/seed length ratio of M. yunnanensis was 0.15. Warm stratification did not break seed dormancy. Dormancy was broken by cold stratification at 4 degrees C but not by flowing water or nitrate. Embryos developed grew inside seeds during cold stratification at 4 degrees C. In newly harvested dormant seeds, embryos were 0.94 tool long and increased in length 139% before radicle emergence (germination). GA(3) Substituted for cold stratification to break dormancy in seeds of M. yunnanensis incubated at 25 degrees C or 20/25 degrees C. Mature M. yunnanensis seeds exhibited intermediate complex morphophysiological dormancy. Optimal germination of non-dormant seed ill terms of both germination percentage and rate occurred at 20/25 degrees C. (C) 2009 Elsevier B.V. All rights reserved.
出版日期: 2010-02-26
卷号: 124, 期号:1, 页码:83-87
语种: 英语
收录类别: SCI
学科分类: Horticulture
ISSN号: 0304-4238
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/14091
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Virginia Polytech Inst & State Univ, Dept Hort, Blacksburg, VA 24061 USA
4.Minzu Univ China, Coll Life & Environm Sci, Beijing 100081, Peoples R China

Recommended Citation:
Han, CY; Welbaum, G; Long, CL.Seed dormancy and germination of Michelia yunnanensis (Magnoliaceae),SCIENTIA HORTICULTURAE,2010,124(1):83-87
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