干旱区生态环境知识资源中心(Arid): 荒漠植物叶片碳同位素组成及其水分利用效率

Arid

	荒漠植物叶片碳同位素组成及其水分利用效率
其他题名	Stable Carbon Isotope Composition of Desert Plant Leaves and Water-use Efficiency
	陈拓 1; 冯虎元 2; 徐世建 2; 强维亚 2; 安黎哲 2
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2002
卷号	22 期号:3 页码:288-291
中文摘要	水分通常是影响荒漠植物生长的主要限制因子，然而当前很少有关于荒漠群落中植物水分利用效率的报道，作为指示水分利用效率的可靠指标，叶片稳定碳同位素组成（delta^13C值）可以用来探讨植物适应干旱环境的强弱程度,对阜康和金塔同种或同属的植物叶片delta^13C的测量结果表明，干旱可使植物叶片delta^13C升高，年降水量每增加1mm，叶片delta^13C则降低0．01－0．015，阜康荒漠灌木叶片delta^13C值明显高于草本，这样的趋势也存在于甘肃金塔主要荒漠植物中，与前人的报道也基本一致，说明灌木可能更适应干旱胁迫，并且这种现象可能是全球荒漠生态系统的一种共性，对阜康四种荒漠代表植物红砂，梭梭，补血草和骆驼刺的SOD活性的测定结果间接地支持了这一结果，进一步的分析表明，藜科，豆科和某些禾本科植物适应干旱环境的能力相对较强。
英文摘要	Water is usually considered to be the key limiting factor for growth of desert plants, yet there is little information available of the water use efficiency of species within a desert community. As a reliable indicator of long-term water use efficiency in C3 plants, leaf carbon isotope ratios were often used to evalu-ate the adaptive degree of plants to arid environments. So, foliar delta~(13)C values were measured on species oc-curring within two desert communities of Fukang, Xinjiang and Jinta, Gansu. The results showed that dryer condition led to higher foliar delta~(13)C values. A decrease of 1 mm in annual precipitation amount would result in an increase of 0. 01～0. 015 in foliar delta~(13)C values. Both in Fukang and in Jinta, foliar delta~(13)C val-ues of shrubs were significantly more positive to these of grasses, which were closely sirnillar to those from the previous literature sources, indicating that shrubs have stronger adaptability to arid environments than grasses do. The conclusion was indirectly supported by SOD activities, SOD activities of Reaumuria soon-gorica and Haloxylon ammodendron were higher 1 time than those of Alhagi spasifolia and Limonium gmelinii. The further analysis showed that plants with stronger adaptability to arid environments came mainly from Chenopodiaceae and Leguminosae families and partly from Gramineae families.
中文关键词	碳同位素 ; 荒漠植物 ; 水分利用效率 ; 新疆 ; 补血草 ; 骆驼刺 ; 生态系统 ; 叶片
英文关键词	delta^13C desert plant water use efficiency delta~(13)C adaptability xinjiang
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:1075250
来源机构	中国科学院西北生态环境资源研究院 ; 兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203657
作者单位	1.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国; 2.兰州大学生命科学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	陈拓,冯虎元,徐世建,等. 荒漠植物叶片碳同位素组成及其水分利用效率[J]. 中国科学院西北生态环境资源研究院, 兰州大学,2002,22(3):288-291.
APA	陈拓,冯虎元,徐世建,强维亚,&安黎哲.(2002).荒漠植物叶片碳同位素组成及其水分利用效率.中国沙漠,22(3),288-291.
MLA	陈拓,et al."荒漠植物叶片碳同位素组成及其水分利用效率".中国沙漠 22.3(2002):288-291.