干旱区生态环境知识资源中心(Arid): Endo-Glycanhydrolases Activities in Artemisia sphaerocephala (Asteraceae) Mucilaginous Achene Germination Process

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	Endo-Glycanhydrolases Activities in Artemisia sphaerocephala (Asteraceae) Mucilaginous Achene Germination Process
其他题名	白沙蒿粘液瘦果萌发中聚糖内切水解酶的活动特性
	Huang Zhenying; Daphne J Osborne
来源期刊	Acta Botanica Sinica
ISSN	1672-6650
出版年	2002
卷号	44 期号:6 页码:753-756
中文摘要	对白沙蒿（Artemisia sphaerocephaha Krasch）种子萌发阶段的种胚提取物中几种可能降解果皮外层粘液物质的多糖内切酶进行了检测。研究结果表明：多聚半乳糖醛酶在干燥胚中局存在并具较高的活性，但其活性随着种子吸涨及萌发而降低。此酶并不释放肿胚外。beta－甘露聚糖内切酶随着种子的吸涨而增加并被萌发的种胚释放到种子外。纤维素酶在种子萌发的过程中不表达出活性。提取物中的所有多糖内切酶都无法降解果皮外层的粘液物质。
英文摘要	Artemisia sphaerocepliala is a sand-fixing shrub oc-curring in the deserts of Northwest China. The polysac-charide pellicle that surrounds the achene forms during seed development and becomes a thick mucilaginous layer when the dry seed is wetted. In natural habitats, the ach-enes start to mature from September to October . The mature achenes, enclosed in their dry polysaccharide pel-licles , are dispersed by wind and adhere to sand grains by the mucilaginous layer that develops from the pellicle when the achene surface is wetted. A major component of the mucilage on the exterior of the pericarp is pectin. The thick pellicle of these species serves as a means of water catchment as well as helping the seed adhere to sand par-ticles . Strong adherence to the sand surface once the mu-cilage is dry prevents further dispersion by rain and wind and deters collection by ants and other seed preda-tore~[2,3].
中文关键词	白沙蒿 ; 粘液瘦果 ; 多聚半乳糖醛酸酶 ; beta-甘露聚糖内切酶
英文关键词	artemisia sphaerocephala mucilaginous achene polygalacturonase endo-beta-mannanase
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:1365208
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334830
作者单位	Huang Zhenying, Institute of Botany, 'flie Chinese Academy of Sciences, Laboratory of Quantitative Vegetation Ecology, CAS, BeiJing 100093, China.; Daphne J Osborne, Oxford Research Unit, Foxcombe Hall, Boars Hill, Oxford, England.; Daphne JOsborne, Oxford Research Unit, Foxcombe Hall, Boars Hill, Oxford, England.
推荐引用方式 GB/T 7714	Huang Zhenying,Daphne J Osborne. Endo-Glycanhydrolases Activities in Artemisia sphaerocephala (Asteraceae) Mucilaginous Achene Germination Process[J],2002,44(6):753-756.
APA	Huang Zhenying,&Daphne J Osborne.(2002).Endo-Glycanhydrolases Activities in Artemisia sphaerocephala (Asteraceae) Mucilaginous Achene Germination Process.Acta Botanica Sinica,44(6),753-756.
MLA	Huang Zhenying,et al."Endo-Glycanhydrolases Activities in Artemisia sphaerocephala (Asteraceae) Mucilaginous Achene Germination Process".Acta Botanica Sinica 44.6(2002):753-756.