干旱区生态环境知识资源中心(Arid): 新疆短命植物抱茎独行菜种子粘液质特性的研究

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	新疆短命植物抱茎独行菜种子粘液质特性的研究
其他题名	Characterization of the Seed Coat Mucilage Properties of Ephemeral Plant Lepidium perfoliatum L.in Xinjiang
	谷丽丽; 刘立鸿; 油天钰; 兰海燕; 张富春
ISSN	1000-4025
出版年	2008
卷号	28 期号:12 页码:2451-2460
中文摘要	以新疆荒漠植物抱茎独行菜为材料,运用光镜与扫描电镜观察以及紫外吸收光谱法、化学反应及种子萌发实验等方法,对粘液质的形态和结构,物理化学特性,粘液质对种子萌发及萌发后的影响进行了研究.结果显示:(1)完整干种子表面覆盖着一层膜状物质(完全脱水的粘液质),并呈同一走向的山脊状突出的网状结构,遇水后粘液物质呈射线状向外发射出来,化学反应实验结果表明,粘液质的组成可能是某种多糖,如beta-葡聚糖.(2)粘液质约占干种子重量的1/4,有很强的吸水能力,完全浸润10 min后,种子重量增加约3040倍,种子长度、宽度、厚度的增加分别多于1倍、2倍、4倍;完全润湿的种子能够粘附相当于其干种子重量68倍的沙粒.(3)种皮粘液质对于不同土壤基质中的种子萌发有重要作用,但是对萌发后幼苗的生长没有作用.
英文摘要	In present study,an ephemeral plant species which distributes in Xinjiang desert Lepidium perfoliatum L.was studied on the seed coat mucilage as follows:morphology and structure,chemical and physical properties,effect of the mucilage on seed germination and post-germination by methods of light microscope and scanning electron microscopy observation,UV absorption spectrum,chemical reaction,and seed germination.The result revealed:(1)the surface of intact dry seeds covered pellicle(dehydrated mucilage) layer and displayed structure of network which was ridge-like protuberance along the same direction;when contact with water,the hydrated seed emitted mucilaginous substance as many radial cords.Results of various chemical reactions of mucilage suggested that the component might be some polysaccharide as beta-glucan.(2)The physical properties revealed that mucilage accounted for approximately 1/4 of dry seed weight,it had high capacity in water catchment,after fully wetting within 10 min,seed weight increased for about 3040 times;the seed size increased more than one time in length,two times in width and four times in thickness.In addition,the fully-wetted seeds were able to adhere sand particle to 68 times of the dry seed weight.(3)Seed mucilage was important for seed germination in different soils,but it did not contribute to the post-germination growth.
中文关键词	种皮粘液质 ; 抱茎独行菜 ; 形态和结构 ; 物理与化学特性 ; 种子萌发 ; 短命植物
英文关键词	seed coat mucilage Lepidium perfoliatum L. morphology and structure physical and chemical properties seed germination ephemeral plant
语种	英语
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:3441518
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222937
作者单位	College of Life Science and Technology, Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, Urumqi, Xinjiang 830046, China
推荐引用方式 GB/T 7714	谷丽丽,刘立鸿,油天钰,等. 新疆短命植物抱茎独行菜种子粘液质特性的研究[J]. 新疆大学,2008,28(12):2451-2460.
APA	谷丽丽,刘立鸿,油天钰,兰海燕,&张富春.(2008).新疆短命植物抱茎独行菜种子粘液质特性的研究.,28(12),2451-2460.
MLA	谷丽丽,et al."新疆短命植物抱茎独行菜种子粘液质特性的研究".28.12(2008):2451-2460.