紫外辐射对南极棕囊藻细胞DMSP合成和DMS释放率的影响  

Effect of ultraviolet-B radiation on the DMSP synthesis and DMS release of Phaeocystis antarctica

作　　者：杨和福[1] Kirst,GO 

机构地区：[1]国家海洋局第二海洋研究所

出　　处：《海洋学报》1998年第5期101-108,共8页

基　　金：国家自然科学基金

摘　　要：在不同紫外辐射波段下，南极棕囊藻（Ｐｈａｅｏｃｙｓｔｉｓａｎｔａｒｃｔｉｃａ）细胞的生长率、叶绿素ａ、细胞内ＤＭＳＰ含量和ＤＭＳ释放量变化的测定结果表明：ＵＶ－Ｂ对南极棕囊藻细胞生长率和叶绿素ａ含量有抑制效应，ＵＶ－Ｂ还可加快ＤＭＳＰ分解成ＤＭＳ和丙烯酸的分解速率，而ＵＶ－Ａ对该藻细胞的ＤＭＳＰ合成有强烈的抑制效应。鉴于在每年春季极地海洋浮游植物繁殖期间，南极棕囊藻在南极海冰带海洋浮游植物种群结构中占有的优势地位，以及该藻是极地海洋浮游植物中ＤＭＳ的主要释放者，推测南极“臭氧空洞”所增加的紫外辐射可能会对南极海域的ＤＭＳ释放率产生一定的影响。Under different UV light conditions, the cells growth rate, Chl a, dimethylsulfoniopropionat (DMSP )content and dimethysulfide (DMS) releases of Phaeocystis antarctica were determined and showed that ultraviolet (UV-B) inhibit cells growth rate and Chl a. The high capability of cleaved DMSP to DMS and acrylic acid may be caused by UV-B radiation, UV-A inhibits DMSP synthesis. Phaeocystis antarctica is widely distribution in polar water and forms massive near surface blooms in the marginal ice edge zone around Antarctica during spring and summer. A large amount of DMS was released during Phaeocystis antarctica bloom. It is likely significantly that the masses of DMS released in polar water could be relative to the effect of UV-B irradiation from stratospheric ozone depletion.

关 键 词：DMSP DMS 南极 棕囊藻 细胞 紫外辐射 

分 类 号：Q949.254[生物学—植物学]