IMHE OpenIR  > 山地表生过程与生态调控重点实验室
模拟增温对青藏高原多年冻土区小嵩草和藏嵩草生长与抗氧化特征的影响
Alternative TitleEffect of simulative warming on growth and antioxidative characteristics of Kobresia pygmaea
肖瑶1,2; 王根绪1; 杨燕1; 杨阳1; 彭阿辉1,2; 张莉1,2
Corresponding Author王根绪
2017
Source Publication应用生态学报
ISSN1001-9332
Volume28Issue:4Pages:1161-1167
Other Abstract

采用开顶式增温小室(OTCs)方法模拟气候变暖,分别选取青藏高原腹地风火山地区高寒小嵩草草甸和高寒藏嵩草沼泽草甸优势物种小嵩草和藏嵩草为研究对象,对比分析增温处理下两种优势物种叶片的形态与生理特征变化,从而探索高寒植物对气候变暖的内在响应机理.结果表明:增温显著增加了小嵩草叶片长度(40.0%)和叶片数量(72.7%),也显著增加了藏嵩草株高(11.9%)和叶片长度(19.3%),促进了两种优势植物的形态生长和地上生物量增加.增温处理下小嵩草和藏嵩草叶片的膜透性(电导率),活性氧(过氧化氢和超氧阴离子自由基),超氧化物歧化酶、过氧化物酶、抗坏血酸过氧化物酶和过氧化氢酶活性,丙二醛含量均没有显著变化.但抗坏血酸和游离脯氨酸含量在藏嵩草叶片内分别显著增加了29.8%和53.8%,而在小嵩草叶片内没有明显变化.可见,增温下小嵩草和藏嵩草均能够维持正常的抗氧化水平,以维持该区域优势植物生长;但藏嵩草生理过程对增温更加敏感. 
 

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In the present study, open top chambers (OTCs) were employed to simulate temperature increase at Fenghuoshan site, located on the hinterland of Qinghai-Tibetan Plateau. To explore the potential response mechanism of alpine plants under warmer temperature, the leaf morphological and antioxidative characteristics of two dominant species of alpine meadow (Kobresia pygmaea) and alpine swamp meadow (K. tibetica) were analyzed. The results showed that length and numbers of leaves in K. pygmaea increased by 40.0% and 72.7% by warming, respectively. Plant height and leaf length in K. tibetica increased by 11.9% and 19.3% by warming, respectively. Warming improved plant growth and aboveground biomass accumulation in both species. However, warming did not affect leaf membrane permeability (electrolyte leakage),active oxygen species (hydrogen peroxide and superoxide anion),activities of superoxide dismutase,peroxidase,ascorbate peroxidase and catalase, and malondialdehyde content in both species. Ascorbic acid and free proline contents in K. tibetica increased by 29.8% and 53.8%, respectively, but no change was found in K. pygmaea. In conclusion, K. pygmaea and K. tibetica could adapt under warmer temperature through keeping a steady antioxidative status.

Keyword小嵩草 藏嵩草 增温 形态 抗氧化
Subject AreaQ948
DOI10.13287/j.1001-9332.201704.031
Indexed ByCSCD ; 北大中文核心
Language中文
CSCD IDCSCD:5968682
Funding Organization国家重大科学研究计划项目(2013CBA01807) ; 国家自然科学基金项目(41271224、41571204) ; 国家科技支撑计划项目(2014BAC05B01)
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18699
Collection山地表生过程与生态调控重点实验室
Affiliation1.中国科学院水利部成都山地灾害与环境研究所
2.中国科学院大学
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
肖瑶,王根绪,杨燕,等. 模拟增温对青藏高原多年冻土区小嵩草和藏嵩草生长与抗氧化特征的影响[J]. 应用生态学报,2017,28(4):1161-1167.
APA 肖瑶,王根绪,杨燕,杨阳,彭阿辉,&张莉.(2017).模拟增温对青藏高原多年冻土区小嵩草和藏嵩草生长与抗氧化特征的影响.应用生态学报,28(4),1161-1167.
MLA 肖瑶,et al."模拟增温对青藏高原多年冻土区小嵩草和藏嵩草生长与抗氧化特征的影响".应用生态学报 28.4(2017):1161-1167.
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