干旱区生态环境知识资源中心(Arid): 膜果麻黄(Ephedra przewalskii)和白刺(Nitraria tangutorum)幼枝水势及影响因素

Arid

	膜果麻黄(Ephedra przewalskii)和白刺(Nitraria tangutorum)幼枝水势及影响因素
其他题名	Sprout Water Potentials and the Influencing Factors in Ephedra przewalskii and Nitraria tangutorum
	常国华; 陈映全; 高天鹏; 陈明凯; 石晓妮
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2015
卷号	35 期号:2 页码:385-392
中文摘要	为探究干旱环境下植物的水势日变化特征及其与内外因素的相关性,测定了民勤绿洲耐旱植物膜果麻黄(Ephedra przewalskii)和白刺(Nitraria tangutorum)幼枝的水势、含水量及K~+、Ca~(2+)、Na~+、Mg~(2+)含量。结果表明:膜果麻黄和白刺的水势日变化趋势大体呈U型,日最低水势分别为-4.91 MPa和-4.35 MPa。膜果麻黄体内的K~+和Na~+含量日变化不显著,而Ca~(2+)和Mg~(2+)含量变化趋势呈U型;白刺体内K~+、Na~+、Mg~(2+)含量日变化明显,基本呈U型,Ca~(2+)含量日变化不明显。膜果麻黄水势与光照强度及其体内的Ca~(2+)、Mg~(2+)含量密切相关;白刺水势与气温、体内Mg~(2+)含量及含水量密切相关。影响这2种植物水势的因子并不完全一样,但Mg~(2+)离子对二者的水势均具有显著影响。
英文摘要	In order to explore the diurnal variation of water potential of plants in arid area,and the correlation between water potential of plant with external environmental factors and contents of positive ions in plants,water potentials and the contents of four kinds of cations(potassium,calcium,sodium and magnesium ions)in the two drought-endurable plants Ephedra przewalskii and Nitraria tangutorumfrom the Minqin Oasis were determined and water contents of the two plants and soil water content were measured too.The results showed that diurnal changes of water potential of the two kinds of plants both followed U-shaped curves.Daily minimum values of water potential in E.przewalskii and N.tangutorumplant were-4.91 MPa and-4.35 MPa,respectively.No significant differences were observed on diurnal changes of potassium and sodium contents in E.przewalskii,but the changes of calcium and magnesium contents both showed U types.Diurnal variations of potassium,sodium and magnesium contents were obvious in N. tangutorum,followed U types,and only the change of calcium content was not significant.Regression analysis showed that the change of water potential of E.przewalskii was closely related with its calcium and magnesium contents and light intensity.The water potential of N.tangutorum was well related to magnesium ion and water contents in the plant,and temperature.Regulation factors for water potential of the two kinds of plants were not exactly the same,but the effects of magnesium ion on both water potentials were significant.
中文关键词	水势 ; 膜果麻黄(Ephedra przewalskii) ; 白刺(Nitraria tangutorum) ; 阳离子
英文关键词	water potential Ephedra przewalskii Nitraria tangutorum cations
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:5372611
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233737
作者单位	兰州城市学院城市生态与环境生物技术中心/城市环境与污染治理研究所/化学与环境科学学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	常国华,陈映全,高天鹏,等. 膜果麻黄(Ephedra przewalskii)和白刺(Nitraria tangutorum)幼枝水势及影响因素[J],2015,35(2):385-392.
APA	常国华,陈映全,高天鹏,陈明凯,&石晓妮.(2015).膜果麻黄(Ephedra przewalskii)和白刺(Nitraria tangutorum)幼枝水势及影响因素.中国沙漠,35(2),385-392.
MLA	常国华,et al."膜果麻黄(Ephedra przewalskii)和白刺(Nitraria tangutorum)幼枝水势及影响因素".中国沙漠 35.2(2015):385-392.