| 高山冰缘植物游离氨基酸的含量分析 |
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| 引用本文： | 刘艳红,安黎哲,张满效,陈拓,徐世健,刘光琇,王勋陵.高山冰缘植物游离氨基酸的含量分析[J].冰川冻土,2005,27(4):608-614. |
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| 作者姓名： | 刘艳红 安黎哲 张满效 陈拓 徐世健 刘光琇 王勋陵 |
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| 作者单位： | 1. 兰州大学, 干旱与草地农业生态教育部重点实验室, 甘肃, 兰州, 730000;2. 中国农业科学院, 兰州兽医研究所, 甘肃, 兰州, 730046;3. 中国科学院, 寒区旱区环境与工程研究所, 甘肃, 兰州, 730000;4. 兰州石化职业技术学院, 甘肃, 兰州, 730060 |
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| 基金项目： | 教育部重点实验室基金
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国家自然科学基金
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甘肃省自然科学基金 |
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| 摘 要： | 以乌鲁木齐河源区22种主要高山冰缘植物花期叶片为实验材料,分析了游离氨基酸含量.结果表明:多数高山冰缘植物积累大量游离中性氨基酸,总游离氨基酸以脯氨酸(Pro)、苏氨酸(Thr)、天门冬氨酸(Asp)、丙氨酸(Ala)和谷氨酸(Glu)为主要成分.同一植被带不同植物积累游离氨基酸的种类和水平不同,如高山离子芥(Chorispora bungeana)的游离Pro含量占其总游离氨基酸含量的百分比均高出雪莲、黄花夏至草和黄头小甘菊13倍多,含量差异明显.3个植被带植物总游离氨基酸、Pro和中性氨基酸的平均含量,高山流石堆植被高于高山垫状植被和高山草甸植被,高山垫状植被总游离氨基酸和中性氨基酸含量高于高山草甸植被.高山冰缘植物积累不同种类和不同含量水平的游离氨基酸是对严酷环境的一种适应.
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| 关 键 词： | 高山冰缘植物 游离氨基酸 脯氨酸 环境适应 |
| 文章编号： | 1000-0240(2005)04-0608-07 |
| 收稿时间： | 2004-12-20 |
| 修稿时间： | 2004年12月20日 |
Analysis of Free Amino Acids of Alpine Periglacial Plants |
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| LIU Yan-hong,AN Li-Zhe,ZHANG Man-xiao,CHEN Tuo,XU Shi-jian,LIU Guang-xiu,WANG Xun-ling.Analysis of Free Amino Acids of Alpine Periglacial Plants[J].Journal of Glaciology and Geocryology,2005,27(4):608-614. |
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| Authors: | LIU Yan-hong AN Li-Zhe ZHANG Man-xiao CHEN Tuo XU Shi-jian LIU Guang-xiu WANG Xun-ling |
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| Institution: | 1. Key Laboratory of Arid and Grassland Agroecology at Lanzhou University, Ministry of Education, Lanzhou Gansu 730000, China;2. Lanzhou Veterinary Research Institute, Chinese Academy of Agriculture Science, Lanzhou Gansu 730046, China;3. Agricultural Bio-Tech. Laboratory, CAREERI, CAS, Lanzhou Gansu 730000, China;4. Lanzhou Petrochemical Colleg of Technology, Lanzhou Gansu 730060, China |
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| Abstract: | Leaves of 22 main alpine periglacial plants in flowering stage that collected from the source areas of the rqi River were studied. Contents of free amino acids were analyzed. High free neutral amino acid levels were observed in the 22 plant species. It is found that the highest contribution to total amino acid accumulation came from Pro, Thr,Asp,Ala and Glu. Higher levels of free amino acid and greater difference were observed among plants grown in the same vegetation. For talus plants, free Pro content of Chorispora Bungeanawas the highest, up to 67% of the total free amino acids. The percentage of Pro was 13 times higher than that of Sanssurea involucrate, Cancrinia chrysocephalaand Lagopsis flava A greater difference existed between C Bungeana and three other plants. For the three vegetation zones, the sequence of the average contents of the total free amino acids, Pro and neutral amino acids was alpine talus vegetation, alpine cushion vegetation and alpine meadow vegetation. The average content of Pro of alpine meadow vegetation was higher than that of alpine cushion vegetation. In light of the levels of different constituents of free amino acids, it is revealed that the periglacial plants have developed a mechanism adapted to the rigid environments. |
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| Keywords: | alpine periglacial plants free amino acids free proline adaptation to the environments |
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