Seed dormancy and germination of Michelia yunnanensis (Magnoliaceae)
Han, Chun-Yan1,2; Welbaum, Gregory3; Long, Chun-Lin1,4
2010-02-26
发表期刊SCIENTIA HORTICULTURAE
ISSN0304-4238
卷号124期号:1页码:83-87
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.
关键词Embryo Development Ga(3) Cold Stratification Morphophysiological Dormancy
资助信息This study was supported by the Ministry of Science and Technology of China (2008FY110400-2-2 and 2005DKA21006), the Chinese Ministry of Education (projects B08044 and MUC 985-3-3), and the Knowledge Innovation Program of the Chinese Academy of Sciences. The authors thank Dr. An-Jun Tang, Prof. Zhi-Ying Cheng and Mrs. Ji-Feng Luo for helpful research suggestions.
收录类别SCI
语种英语
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/14091
专题资源植物与生物技术所级重点实验室
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
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Han, Chun-Yan,Welbaum, Gregory,Long, Chun-Lin. Seed dormancy and germination of Michelia yunnanensis (Magnoliaceae)[J]. SCIENTIA HORTICULTURAE,2010,124(1):83-87.
APA Han, Chun-Yan,Welbaum, Gregory,&Long, Chun-Lin.(2010).Seed dormancy and germination of Michelia yunnanensis (Magnoliaceae).SCIENTIA HORTICULTURAE,124(1),83-87.
MLA Han, Chun-Yan,et al."Seed dormancy and germination of Michelia yunnanensis (Magnoliaceae)".SCIENTIA HORTICULTURAE 124.1(2010):83-87.
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