Post-dispersal factors regulating dormancy and germination of Rosa soulieana seeds

	Post-dispersal factors regulating dormancy and germination of Rosa soulieana seeds
	Zhou, ZQ; Wu, N; Bao, WK; Qiu, PF; Wu, N, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China.
刊名	BELGIAN JOURNAL OF BOTANY
	2008
卷号	141 期号:1 页码:103_111
关键词	Dry Storage Photon Irradiance Seed Dormancy Temperature Regime Warm Plus Cold Stratification Water Potential
ISSN号	0778-4031
产权排序	1
英文摘要	Successful restoration of vegetation in dry valleys under strong anthropogenic disturbance in southwestern China is limited by lack of information on the germination requirements of many native plants, including some rose species. Effects of post-dispersal factors (temperature, moisture and light) on Rosa soulieana seed dormancy and germination were examined in order to predict the rate and timing of germination in the field. Dry storage, cold stratification, and warm plus cold stratification increased both germination percentages and germination rates. Warm plus cold stratification was most effective in breaking achene dormancy, followed by cold stratification and dry storage. Light during cold stratification had no effect on dormancy break. Germination occurred from 5 degrees C to 30 degrees C. At low temperature, diurnal alternating temperature (5/15 degrees C) was more effective than constant temperature (5 degrees C) in stimulating germination. Water stress significantly led to a decrease in germination percentage and rate. Significant differences under various photon irradiances were observed neither in germination percentages nor in germination rates. Temperature and moisture, but not light, appeared to play important roles in regulating dormancy and germination. Our results suggest that R. soulieana seeds may germinate sporadically from early spring to summer when soil moisture is sufficient for them to initiate this process. However, most achenes should normally germinate in the spring, which is a general phenomenon in plants. For effective restoration of degraded vegetation in dry valleys, it would be recommended to sow fresh achenes in autumn or achenes with dormancy broken in laboratory in early spring and relatively deep in the soil.
学科主题	Plant Sciences
语种	英语
资助机构	Chinese Academy of Sciences [KZCX3-XB2-02]; Chinese Ecosystem Research Network ; Chinese Academy of Sciences [KZCX3-XB2-02]; Chinese Ecosystem Research Network ; Chinese Academy of Sciences [KZCX3-XB2-02]; Chinese Ecosystem Research Network ; Chinese Academy of Sciences [KZCX3-XB2-02]; Chinese Ecosystem Research Network
公开日期	2011-07-08
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/22140]
专题	成都生物研究所_生态研究
通讯作者	Wu, N, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China.
推荐引用方式 GB/T 7714	Zhou, ZQ,Wu, N,Bao, WK,et al. Post-dispersal factors regulating dormancy and germination of Rosa soulieana seeds[J]. BELGIAN JOURNAL OF BOTANY,2008,141(1):103_111.
APA	Zhou, ZQ,Wu, N,Bao, WK,Qiu, PF,&Wu, N, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China..(2008).Post-dispersal factors regulating dormancy and germination of Rosa soulieana seeds.BELGIAN JOURNAL OF BOTANY,141(1),103_111.
MLA	Zhou, ZQ,et al."Post-dispersal factors regulating dormancy and germination of Rosa soulieana seeds".BELGIAN JOURNAL OF BOTANY 141.1(2008):103_111.