| 生物土壤与生态 |
|
|
|
|
| Seasonal Change of Antioxidative Enzymes and Osmotic Regulation in Four Desert Plants |
| ZHU Jun-tao1,2,3, LI Xiang-yi1,3, ZHANG Xi-ming1,3, LIN Li-sha1,3, YANG Shang-gong1,3 |
| 1.State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 2.Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; 3.Xinjiang Cele National Field Scientific Observation and Research Station of Desertification and Grassland Ecosystem, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele 848300, Xinjiang, China |
|
|
|
|
Abstract The southern fringe of the Taklimakan Desert is an extremely arid region with high temperature, strong solar radiation and very little precipitation. Alhagi sparsifolia, Tamarix ramosissima, Karelinia caspica and Calligonum caputmedusae are dominating species in this region. In order to understand the adaptive mechanisms of the plants to the extreme conditions, we investigated the seasonal change of water potential, osmotic regulation and antioxidative systems of the four desert plants. Results showed that the minimum values of the predawn and afternoon water potential occurred in July, the maximal values appeared in June. MDA and AOS contents of A. sparsifolia increased with the seasonal change, however, the maximal values of T. ramosissima, K. caspica and C.caputmedusae occurred in July and August, respectively. The changes of proline, soluble sugar content and the activities of antioxidative enzymes were the same as MDA. Proline and soluble sugar played an important role in adapting to the extreme environment for T. ramosissima, but their contents were lower in K. caspica, since inorganic ion might be considered as osmotic matter. The order for the activities of SOD, POD and CAT was T. ramosissima>C. caputmedusae>A. sparsifolia>K. caspica. In the whole growing periods, AOS accumulation in T. ramosissima was highest, SOD, POD and CAT played important roles in clearing away AOS.
|
|
Received: 05 October 2010
Published: 20 November 2011
|
|
|
[1]朱军涛,李向义,张希明,等.灌溉对疏叶骆驼刺(Alhagi sparsifolia)幼苗光合生理指标及渗透物质的影响[J].中国沙漠,2009,29(4):697-702.
[2]邓雄,李小明,张希明,等.4种荒漠植物气体交换特征的研究[J].植物生态学报,2002,26(5):605-612.
[3]李向义,张希明,曾凡江,等.塔干南缘骆驼刺植被水分关系的研究[J].植物学报,2002,44(10):1219-1224.
[4]张立运,买买提,安尼瓦尔,等.夏季灌溉对骆驼刺形态学特征、群落生态结构的影响[J].干旱区研究,1995,12(4):34-40.
[5]Thomas F M,Arndt S K,Bruelheide H.Ecological basis for a sustainable management of the indigenous vegetation in a Central-Asian desert:Presentation and first results[J].Journal of Applied Botany,2000,74:212-219.
[6]李合生,孙群,赵世杰,等.植物生理生化实验原理和技术[M].北京:高等教育出版社,1999:137-263.
[7]王爱国,罗广华.植物的超氧物自由基与羟胺反应的定量关系[J].植物生理学讯,1990(6):55-57.
[8]Freguson I B,Watkirls C B,Harman J E.lnhibition by calcium of senescence of detached cucumber cotyledons[J].Plant Physiology,1983,71(1):182-186.
[9]王娟,李德全.逆境条件下植物体内渗透调节物质的积累与活性氧代谢[J].植物学通报,2001,18(4):459-465.
[10]韩蕊莲,李丽霞,梁宗锁.干旱胁迫下沙棘叶片细胞膜透性与渗透调节物质研究[J].西北植物学报,2003,23(1):23-27.
[11]蒋志荣.沙冬青抗旱机理的探讨[J].中国沙漠,2000,20(10):71-74.
[12]赵丽英,邓西平,山仑.活性氧清除系统对干旱胁迫的响应机制[J].西北植物学报,2005,25(2):413-418.
[13]孙存华,李扬,贺鸿雁,等.藜对干旱胁迫的生理生化反应[J].生态学报,2005,25(10):2556-2561.
[14]李吉跃,张建国.北方主要造林树种耐旱机理及其分类模型的研究Ⅰ[J].北京林业大学学报,1993,15:1-11.
[15]王霞,侯平,尹林克,等.土壤水分胁迫对柽柳体内膜保护酶及膜脂过氧化的影响[J].干旱区研究,2002,19(3):17-20.
[16]安黎哲,徐世建,冯虎云.沙冬青和柠条渗透调节物质的动态研究[J].中国沙漠,1999,19:250-254.
[17]张金林,陈托兄,王锁民.阿拉善荒漠区几种抗旱植物游离氨基酸和游离脯氨酸的分布特征[J].中国沙漠,2004,24(4):493-499.
[18]龚吉蕊,张立新,赵爱芬,等.油蒿抗旱生理生化特性研究初报[J].中国沙漠,2002,22(4):387-392.
[19]蒋志荣,梁旭婷,朱恭,等.4树种主要生理指标对模拟水分胁迫的响应[J].中国沙漠,2009,29(3):485-492.
[20]周兴元,曹福亮.土壤盐分胁迫对三种暖季型草坪草保护酶活性及膜脂过氧化作用的影响[J].林业科学研究,2005,18(3):336-341.
[21]左利萍,李毅,焦健.水分梯度下不同地理种群红砂叶片生理特征比较研究[J].中国沙漠,2009,29(3):514-518. |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2011, Vol. 31 
