干旱区生态环境知识资源中心(Arid): 不同气候条件下柠条锦鸡儿水力结构特征比较

Arid

	不同气候条件下柠条锦鸡儿水力结构特征比较
其他题名	Comparative Study on the Hydraulic Structural Properties of Caragana korshinskii under Different Weather Conditions
	魏亚冉; 马成仓; 齐书香
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2010
卷号	27 期号:3 页码:363-368
中文摘要	以生长在内蒙古高原荒漠区的柠条锦鸡儿为研究对象,通过观测一年生枝条在不同气候条件下的水力结构特征日变化,结合气候因子,分析旱生植物如何通过调整水分传输来适应变化着的环境条件.结果表明: 不管是晴天还是阴天,柠条锦鸡儿的水力结构参数与气温呈显著线性负相关,与相对湿度呈显著线性正相关; 晴天柠条锦鸡儿的导水率、比导率和叶比导率明显比阴天低.这说明柠条锦鸡儿能根据环境胁迫的变化及时调整水分运输策略,在满足枝端叶片不同需水要求的前提下,尽量减少水分丧失,达到节水的目的
英文摘要	There is a range of mechanisms for desert vegetation to adapt arid conditions, such as the increase of underground part to get morewater. In desert region, there is very little precipitation, high temperature and strong solar radiation. Precipitation, the most importantenvironmental factor in desert region, affects strongly the growth and development of plants. Therefore, reducing water consumption is a key to adapt desert climate. As a typical native shrub species in the Alxa region, Caragana korshinskii has a perfect physiological mechanism and morphological characteristics to adapt arid environment in its long-term evolutionary process. Many studies have been done on physiology, ecology, molecular biology, morphology and anatomy. However, the studies on hydraulic structural properties of plants under drought stress are insufficient. In this study, the hydraulic structural parameters of C. korshinskii on sunny and cloudy days were measured to investigate their daily variation, and their response to environmental factors is researched so as to understand how the plants in desert region suffer from drought stress. In July 2008, some natural C. korshinskii plants (15-20 years old) in the Alxa region were selected to research their hydraulic structural properties. On sunny and cloudy days, eight healthy plants were selected, and then 1-year-old twigs were picked to measure the hydraulic structural parameters. The results show that the daily variation of hydraulic conductivity on sunny and cloudy days was similar, it was high in the morning, began to decline after sunrise, and increased to the level of that in the morning in the afternoon. The daily variation of specific conductivity (Ks)on sunny and cloudy days was also similar
中文关键词	气候因子 ; 柠条锦鸡儿(Caragana korshinskii) ; 水力结构 ; 环境因子 ; 日变化 ; 阿拉善 ; 内蒙古
英文关键词	climatic factors C. korshinskii hydraulic structure environmental factor daily variation Alxa region Inner Mongolia
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:3930782
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225066
作者单位	天津师范大学生命科学学院, 天津 300387, 中国
推荐引用方式 GB/T 7714	魏亚冉,马成仓,齐书香. 不同气候条件下柠条锦鸡儿水力结构特征比较[J],2010,27(3):363-368.
APA	魏亚冉,马成仓,&齐书香.(2010).不同气候条件下柠条锦鸡儿水力结构特征比较.干旱区研究,27(3),363-368.
MLA	魏亚冉,et al."不同气候条件下柠条锦鸡儿水力结构特征比较".干旱区研究 27.3(2010):363-368.