留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码
薛林贵, 徐世健, 李师翁, 张勇, 安黎哲. 螺旋藻对增强的UV-B胁迫的响应[J]. 水生生物学报, 2007, 31(2): 202-207.
引用本文: 薛林贵, 徐世健, 李师翁, 张勇, 安黎哲. 螺旋藻对增强的UV-B胁迫的响应[J]. 水生生物学报, 2007, 31(2): 202-207.
XUE Lin-Gui, XU Shi-Jian, LI Shi-Weng, ZHANG Yong, AN Li-Zhe. RESPONSE OF SPIRULINA PLATENSIS TO ENHANCED UV -B STRESS[J]. ACTA HYDROBIOLOGICA SINICA, 2007, 31(2): 202-207.
Citation: XUE Lin-Gui, XU Shi-Jian, LI Shi-Weng, ZHANG Yong, AN Li-Zhe. RESPONSE OF SPIRULINA PLATENSIS TO ENHANCED UV -B STRESS[J]. ACTA HYDROBIOLOGICA SINICA, 2007, 31(2): 202-207.

螺旋藻对增强的UV-B胁迫的响应

RESPONSE OF SPIRULINA PLATENSIS TO ENHANCED UV -B STRESS

  • 摘要: 本文研究了实验室条件下增强的UV-B(280-320nm)胁迫对一种蓝藻-钝顶螺旋藻(Spirulina platensis)794生物量、色素和蛋白、细胞内MDA含量及活性氧产生的影响。结果表明,在增强的UV-B胁迫下,螺旋藻的生物量减少,细胞内叶绿素a和类胡萝卜素含量降低,从而使螺旋藻的生长发育受到一定程度的抑制,而细胞浆蛋白质含量增加,这可能是螺旋藻对逆境胁迫的一种适应性反应。增强UV-B胁迫下,螺旋藻细胞内MDA含量增加,与之相对应,活性氧的产生速率也增加,进一步证实了逆境胁迫下,植物细胞内叶绿素含量的下降、MDA的积累主要与UV-B胁迫下活性氧的产生及其对细胞的氧化损伤有关。

     

    Abstract: In recent years, continuing depletion of the stratospheric ozone layer by atmospheric pollutants, in particular chlorofluorocarbons ( CFCs), has resulted in an increasing incidence of solar UV-B( 280-320nm)at the Earth' s surface. The process of ozone depletion is expected to increase and spread to abroader range of altitudes and latitudes throughout most of the current century. The effect of depletion of the stratospheric ozone layer has been taken place not only in the polarregions, but also in temperate regions. Besides exerting a variety of adverse effects on terrestrial vegetation, enhanced UV-B radiation is also known to penetrate fairly deep in freshwater and marine environments,in which it affects both the plankton in the euphotic zone as well as benthic organisms. Enhanced UV-B radiation has been considered as an important global environmental problem and resulted in important effects to mankind and the entire global ecosystem. Therefore, many investigations have been carried out to elucidate the resulting biological effects. The research results showed that the dramatic decreaserin development, biomass, photosynthesis and respiration of plants under enhanced UV-B radiation. Cyanobacteria are ecologically and economically important group living prokaryote of single cell in the world, which has important ecological site, characteristic ability of metabolism and important value of research. Cyanobacteria have a cosmopolitan distribution ranging from hot springs to the Arcticand Antarctic regions. Being photosynthetic prokaryotes, they formed an important component of the nitrogen-fixing microbial population both in aquatic and terrestrial ecosystems especially in tropical rice fields. Cyanobacterium also has significant economic potentials, being used in the production of food for humans and animals, fertilizers and cosmetics, to name only a few. In this paper, the response of a kind of cyanobacterium Spirulina platensis 794 to enhanced UV-B stress under laboratory condition were studied by the determination of some physiological indexes. It was shown that the biomass decrease, content of chlorophyll a and carotinoid in cell of Spirulina platensis 794 reduce under UV-B stress, which resulted in certain inhibition on growth and development of Spirulina platensis. But the content of cell plasmic protein increased, it maybe was an adaptive response of Spirulina platensis to stress. Under enhanced UV-B stress, not only the content of MDA but also O2 increased in Spirulina platensis cells. It suggested that the decrease of content of chlorophyll a and the increase of content of MDA in cell related with the oxidation harm of O2.

     

/

返回文章
返回