Levels of physiological dormancy and methods for improving seed germination of four rose species

	Levels of physiological dormancy and methods for improving seed germination of four rose species
	Zhou, Zhiqiong ; Bao, Weikai
刊名	SCIENTIA HORTICULTURAE
	2011
卷号	129 期号:4 页码:818-824
关键词	H2SO4 scarification Physiological dormancy Rosa Seed germination Stratification
ISSN号	0304-4238
通讯作者	Bao, WK (reprint author), Chinese Acad Sci, Chengdu Inst Biol, Key Lab Ecol Restorat, Chengdu 610041, Peoples R China.
产权排序	1
英文摘要	Low seed germination is a major problem in commercial rose propagation and breeding and is species-dependent. The present work selected four rose species previously un-examined to explore effective methods for improving seed germination and the relevant dormancy mechanism and its levels in seven experiments. The results showed that both pulp and achenes from the four rose shrubs had chemical substances that significantly inhibited seed germination with the inhibitory effect was more pronounced in pulp extract than of achenes. Single treatments of H2SO4 scarification, short-term cold stratification (<16 weeks) or warm stratification were less effective in breaking dormancy as indicated by lower germination index than their combinations. Comprehensive comparisons showed that among the six treatments the most effective for breaking dormancy was H2SO4 scarification followed by warm plus cold stratification, then H2SO4 scarification followed by cold stratification and finally warm plus cold stratification. Scarification with H2SO4 for 2-4 h ordinal followed by warm stratification at 20 C for 4 weeks and cold stratification at 5 degrees C for 8 weeks was the best pretreatment for increasing seed germination percentage for Rosa multibracteata (81.4 +/- 2.9%), Rosa hugonis (13.1 +/- 6.0%), and Rosa filipes (62.7 +/- 5.7%); and H2SO4 scarification for 4 h followed by cold stratification at 5 degrees C for 12 weeks was the best pretreatment for Rosa sericea (46.7 +/- 8.7%). Our results suggest that these four species have only physiological dormancy caused by integrative roles of pulp, pericarp and embryo. The level of physiological dormancy was ranked as R. hugonis > R. sericea > R. filipes > R. multi bracteata. (C) 2011 Elsevier B.V. All rights reserved.
学科主题	Agriculture
收录类别	SCI
资助信息	Chinese Academy of Sciences[KSCX2-EW-J-22, KZCX2-XB2-02]
语种	英语
WOS记录号	WOS:000294236900044
公开日期	2012-11-09
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/23439]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Zhou, Zhiqiong,Bao, Weikai. Levels of physiological dormancy and methods for improving seed germination of four rose species[J]. SCIENTIA HORTICULTURAE,2011,129(4):818-824.
APA	Zhou, Zhiqiong,&Bao, Weikai.(2011).Levels of physiological dormancy and methods for improving seed germination of four rose species.SCIENTIA HORTICULTURAE,129(4),818-824.
MLA	Zhou, Zhiqiong,et al."Levels of physiological dormancy and methods for improving seed germination of four rose species".SCIENTIA HORTICULTURAE 129.4(2011):818-824.