紫外辐射对南极棕囊藻细胞DMSP合成和DMS释放率的影响

杨和福; GOKirst; MBaumann; LRiegger

紫外辐射对南极棕囊藻细胞DMSP合成和DMS释放率的影响

1.
国家海洋局第二海洋研究所, 杭州310012
2.
Universit fü Bremen, FB2, Meeresbotanik, 28334 Bremen, Postfach 330440, Germany
3.
Alfred-Wegener-lnsitut fü Polar-und Meeresforschung, 27515 Bremerharven, Postfach 120161, Germany

基金项目: 国家自然科学基金资助项目(编号:49776310)

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出版历程
- 收稿日期: 1996-12-20
- 修回日期: 1997-01-15

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

1.
Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012
2.
Universit fü Bremen, FB2, Meeresbotanik, 28334 Bremen, Postfach 330440, Germany
3.
Alfred-Wegener-lnsitut fü Polar-und Meeresforschung, 27515 Bremerharven, Postfach 120161, Germany

摘要

摘要: 在不同紫外辐射波段下,南极棕囊藻(Phaeocystis antarctica)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。
- UV /
- DMSP /
- DMS /
- 南极棕囊藻
Abstract: Abstract-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.
- UV /
- DMSP /
- DMS /
- Phaeocystis antarctica

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