UV - B辐射对生物结皮层藓类植物生理生化指标的影响
Alternative TitleEffects of enhanced UV-B radiation on physiological and biochemical indexes of moss from biological soil crusts
回嵘1; 李新荣1; 超锐明2; 赵昕1
Year Published2014
Abstract in Chinese以腾格里沙漠东南缘人工固沙植被区常见藓类结皮中的真藓(Bryum argenteurn)和土生对齿藓(Didymodon vinealis )为研究对象,通过室内模拟沙坡头地区臭氧损耗0% (对照)、6%、9%和12%所达到的UV-B强度梯度(2.75、3.08、3.25、3.41 W?m~(-2)),研究了增强UV-B辐射对两种藓类植物渗透调节物质、膜质过氧化程度及抗氧化酶活性的影响。结果表明:随着UV-B辐射增加,两种藓类植物丙二醛(MDA)含量显著升高;可溶性糖含量、超氧化物歧化酶(SOD)及过氧化氢酶(CAT)活性则降低;且UV-B辐射对真藓的影响大于土生对齿藓,说明真藓对UV-B辐射相对更敏感。本研究结果也预示着在未来UV-B辐射增强的情况下,温带荒漠生物土壤结皮(BSC)的组成和结构将会发生显著变化,这种变化将会深刻地影响BSC在荒漠生态系统中的功能,进而影响荒漠生态系统的健康和稳定。
Abstract in EnglishTaking Bryum argenteum and Didymodon vinealis crusts from an artificial vegetation area of southeastern fringe of the Tengger Desert in northwestern China (37°32’-37°26’N, 105°02’-104°30’E) as a test object,to determine the influence of enhanced UV-B radiation on the osmotic adjustment of substances,membrane integrity, and the antioxidant enzyme system in laboratory. Simulating the depletion of the stratospheric ozone layer by 0% (control),6%,9%,and 12% to obtain the levels of UV-B (2.75,3.08,3.25, and 3.41 W?m~(-2)), respectively. The results showed that the malondialdehyde (MDA) content of B. argenteum and D. vinealis significantly increased, while the soluble sugar content,SOD,and CAT activities decreased,with increased UV-B intensity. Moreover, the effects of soluble sugar content, MDA content, SOD, and CAT activities after UV-B exposure were greater in B. argenteum than that in D. vinealis,and suggested that B. argenteum was more sensitive to enhanced UV-B radiation than D. vinealis. These results also indicate that the composition and structure of biological soil crusts (BSC) will significantly change under future enhanced UV-B radiation,and these changes will profoundly influence the functioning of BSC in deserts and influence the health and stability of these ecosystems.
Keyword in Chinese紫外线-B(UV-B) ; 生物土壤结皮(BSC) ; 渗透调节 ; 丙二醛(MDA) ; 抗氧化酶
Keyword in Englishultraviolet-B (UV-B) biological soil crust osmotic adjustment malondialdehyde (MDA) antioxidant enzyme
Indexed ByCSCD
WOS Research AreaPlant Sciences
Source Institution中国科学院西北生态环境资源研究院 ; 甘肃农业大学
Document Type期刊论文
Affiliation1.中国科学院寒区旱区环境与工程研究所, 中国科学院植物逆境生理生态与生物技术实验室;;中科院沙坡头沙漠试验研究站, 兰州, 甘肃 730000, 中国;
2.甘肃农业大学生命科学技术学院, 兰州, 甘肃 730000, 中国
Recommended Citation
GB/T 7714
回嵘,李新荣,超锐明,等. UV - B辐射对生物结皮层藓类植物生理生化指标的影响[J]. 中国科学院西北生态环境资源研究院, 甘肃农业大学,2014,37(6):1222-1230.
APA 回嵘,李新荣,超锐明,&赵昕.(2014).UV - B辐射对生物结皮层藓类植物生理生化指标的影响.干旱区地理,37(6),1222-1230.
MLA 回嵘,et al."UV - B辐射对生物结皮层藓类植物生理生化指标的影响".干旱区地理 37.6(2014):1222-1230.
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