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题名: Physiological dormancy in seeds of two endemic species of Begonia from Yunnan Province, China: diagnosis and classification
作者: Hu, Xiao-Jian1, 2; Yang, Li-Hua1, 2; Guan, Kai-Yun1
刊名: PLANT SPECIES BIOLOGY
关键词: Begonia ; embryo ; germination ; physiological dormancy ; seed
英文摘要: With the purpose of assessing the status of dormancy in seeds of two Begonia species (Begonia lithophila and Begonia guishanensis), freshly matured seeds were given gibberellic acid and moist chilling and allowed to dry after ripening. The seeds were then germinated on media with or without KNO3 at 15, 20, 25, 30 and 18/25 degrees C. All three treatments significantly increased germination percentages. Examination by X-ray revealed that seeds of both species have a fully developed embryo and thus have no morphological component of dormancy; seeds readily imbibed water and KNO3 solution. Therefore, we conclude that seeds of the two Begonia species have non-deep physiological dormancy. Although KNO3 significantly increased germination in both species, alternating temperatures did not, suggesting that the most favorable microhabitat for germination is small-scale disturbances under the forest canopy.
出版日期: 2012-09-01
卷号: 27, 期号:3, 页码:201-209
DOI标识: 10.1111/j.1442-1984.2011.00344.x
语种: 英语
收录类别: SCI
ISSN号: 0913-557X
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/15672
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, Key Lab Econ Plants & Biotechnol, Kunming 650204, Yunnan, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Hu, Xiao-Jian; Yang, Li-Hua; Guan, Kai-Yun.Physiological dormancy in seeds of two endemic species of Begonia from Yunnan Province, China: diagnosis and classification,PLANT SPECIES BIOLOGY,2012,27(3):201-209
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