干旱区生态环境知识资源中心(Arid): 盐生草(Halogeton glomeratus)二型种子的休眠与萌发

Arid

	盐生草(Halogeton glomeratus)二型种子的休眠与萌发
其他题名	Germination of dimorphism seeds in Halogeton glomeratus (Chenopodiaceae)
	于晓 1; 严成 2; 魏岩 1
ISSN	1000-0933
出版年	2009
卷号	29 期号:3 页码:1616-1621
中文摘要	盐生草的果实和种子存在二型性,这两种类型的种子在形状、大小、颜色及包被其花被片背部是否具翅上均有显著差异.绿色种子,圆形,直径为(1.5520.116) mm,宿存花被革质,背部有紫红色翅状附属物,单粒重为(0.8080.033)mg;黄色种子,椭圆形,长为(1.7520.155) mm,宽为(1.1460.088) mm,宿存花被革质,背部无翅状附属物,单粒重为(0.5680.011) mg.两种种子在3个变温条件(5/25℃、5/25℃、15/25℃,暗12 h /光12 h)下的萌发率均较低,绿色种子为36%,而黄色种子为17%(15℃/25℃).延长储藏时间和划破种皮均能显著提高绿色种子的萌发率,表明绿色种子属于非深度生理休眠.随着储藏时间的延长,黄色种子的萌发率也能缓慢提高,但不显著,而划破种皮能够显著促进其萌发,表明黄色种子属于深度生理休眠.
英文摘要	The fruit and seed characteristics were observed on Halogeton glomeratus C. A. Mey. from Junggar Desert. It is found the seeds of Halogeton glomeratus are dimorphism. The two types of seeds are different in shape, size, color and external structure of seeds. The green seeds have lignified tepals with long wings, can be easily dispersed by wind to a far distance from the mother plant. The yellow seeds have tepals without wings, and dispersed near the mother plant. The seeds of Halogeton glomeratus germinated in incubators for 30 d with a 12 h photoperiod and 12 h thermoperiods (dark / light) of 5/15℃ , 5/25℃ and 15/25℃. The germination percentages of freshly matured dimorphism seeds are low ( <50%). Extending the storage time can significantly increase germination percentage of green seeds, but have no significant effect on yellow seeds. Scarification on covering layers can significantly increase the germination percentage of these dimorphism seeds. Results indicated that green seeds have non-deep physiological dormancy and yellow seeds have deep physiological dormancy.
中文关键词	盐生草 ; 种子二型性 ; 萌发行为 ; 种子休眠
英文关键词	Halogeton glomeratus C. A. Mey. seed dimorphism germination behavior seed dormancy
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3643671
来源机构	中国科学院新疆生态与地理研究所 ; 新疆农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224038
作者单位	1.新疆农业大学,草业与环境科学学院, 乌鲁木齐, 新疆 830052, 中国; 2.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	于晓,严成,魏岩. 盐生草(Halogeton glomeratus)二型种子的休眠与萌发[J]. 中国科学院新疆生态与地理研究所, 新疆农业大学,2009,29(3):1616-1621.
APA	于晓,严成,&魏岩.(2009).盐生草(Halogeton glomeratus)二型种子的休眠与萌发.,29(3),1616-1621.
MLA	于晓,et al."盐生草(Halogeton glomeratus)二型种子的休眠与萌发".29.3(2009):1616-1621.