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| 树锦鸡儿、柠条锦鸡儿、小叶锦鸡儿和鹰嘴豆干旱适应能力比较 | |
| 引用本文： | 方向文,李凤民,张海娜,蒋志荣. 树锦鸡儿、柠条锦鸡儿、小叶锦鸡儿和鹰嘴豆干旱适应能力比较[J]. 生态学报, 2011, 31(9): 2437-2443 |
| 作者姓名： | 方向文 李凤民 张海娜 蒋志荣 |
| 作者单位： | 1. 兰州大学干旱与草地生态教育部重点实验室,甘肃兰州,730000 2. 甘肃农业大学林学院,甘肃兰州,730070 3. 甘肃农业大学林学院,甘肃兰州,730070;甘肃农村发展研究院,甘肃兰州,730070 |
| 基金项目： | 国家自然科学基金(30800124, 31070354);教育部博士点基金(200807301007);春晖计划(Z2007-1-62002);兰州大学中央高校基本科研业务费专项资金资助(lzujbky-2009-37) |
| 摘 要： | 对1年生豆科作物鹰嘴豆Rupali品种和Almaz品种以及多年生植物树锦鸡儿、柠条锦鸡儿和小叶锦鸡儿叶相对含水量和叶水势对逐渐干旱胁迫的响应进行了分析,比较了两类植物的干旱适应能力。结果表明鹰嘴豆叶相对含水量随叶水势的下降线性下降,树锦鸡儿、柠条锦鸡儿和小叶锦鸡儿叶相对含水量在叶水势分别下降到-2.4MPa、-2.5MPa和-1.5 MPa之前没有下降,之后随水势的下降线性下降。树锦鸡儿、柠条锦鸡儿和小叶锦鸡儿这种叶相对含水量下降的滞后性表明该类植物叶具有较硬而弹性较差的细胞壁,使得植物在干旱胁迫下叶具有良好的保水能力。鹰嘴豆叶具有的最低水势为-4.5MPa,对应的土壤相对含水量为14％,锦鸡儿植物叶具有的最低水势可达-6.7MPa,对应的土壤相对含水量为6％,说明锦鸡儿植物比鹰嘴豆具有更好的干旱适应能力,这种能力可能取决于锦鸡儿植物体内大量渗透调节物质的累积。 |
| 关 键 词： | 树锦鸡儿 柠条锦鸡儿 小叶锦鸡儿 鹰嘴豆 干旱适应 叶水势 叶相对含水量 |
| 收稿时间： | 2010-11-11 |
| 修稿时间： | 2011-02-21 |
The comparation of drought resistance between Caragana species (Caragana arborescens, C. korshinskii, C. microphylla) and two chickpea (Cicer arietinum L.) cultivars |
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| FANG Xiangwen,LI Fengmin,ZHANG Haina and JIANG Zhirong. The comparation of drought resistance between Caragana species (Caragana arborescens, C. korshinskii, C. microphylla) and two chickpea (Cicer arietinum L.) cultivars[J]. Acta Ecologica Sinica, 2011, 31(9): 2437-2443 | |
| Authors: | FANG Xiangwen LI Fengmin ZHANG Haina JIANG Zhirong |
| Affiliation: | Key Laboratory of Arid and Grassland Agroecology at Lanzhou University, Ministry of Education, Lanzhou 730000, China;Key Laboratory of Arid and Grassland Agroecology at Lanzhou University, Ministry of Education, Lanzhou 730000, China;Forestry College of Gansu Agricultural University, Lanzhou 730070, China;Forestry College of Gansu Agricultural University, Lanzhou 730070, China;Gansu Rural Development Research Institute, Lanzhou 730070, China |
| Abstract: | Water stress is the main environmental factor limiting plantproductivity,especially in arid and semi-arid areas.Within limits,plants adapt to water stress through physiological and morphological adaptations,and leaf water potential(LWP) and leaf relative water content(RWC) are widely used to determine plant water status.Several studies have demonstrated the relationship between RWC and LWP to quantify the dehydration tolerance of tissues: tissues which maintain a high RWC as LWP decreases are more tolerant ... |
| Keywords: | Caragana arborescens C. korshinskii C. microphyll chickpea predawn leaf water potential (LWP) leaf relative water content (RWC) water deficit |
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