GSTDTAP  > 地球科学
DOI10.1073/pnas.1810886116
Photosynthetic adaptation to low iron, light, and temperature in Southern Ocean phytoplankton
Strzepek, Robert F.1; Boyd, Philip W.1,2; Sunda, William G.3
2019
发表期刊PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
出版年2019
卷号116期号:10页码:4388-4393
文章类型Article
语种英语
国家Australia; USA
英文摘要

Phytoplankton productivity in the polar Southern Ocean (SO) plays an important role in the transfer of carbon from the atmosphere to the ocean's interior, a process called the biological carbon pump, which helps regulate global climate. SO productivity in turn is limited by low iron, light, and temperature, which restrict the efficiency of the carbon pump. Iron and light can colimit productivity due to the high iron content of the photosynthetic photosystems and the need for increased photosystems for low-light acclimation in many phytoplankton. Here we show that SO phytoplankton have evolved critical adaptations to enhance photosynthetic rates under the joint constraints of low iron, light, and temperature. Under growth-limiting iron and light levels, three SO species had up to sixfold higher photosynthetic rates per photosystem II and similar or higher rates per mol of photosynthetic iron than temperate species, despite their lower growth temperature (3 vs. 18 degrees C) and light intensity (30 vs. 40 mu mol quanta.m(2).s(-1)), which should have decreased photosynthetic rates. These unexpectedly high rates in the SO species are partly explained by their unusually large photosynthetic antennae, which are among the largest ever recorded in marine phytoplankton. Large antennae are disadvantageous at low light intensities because they increase excitation energy loss as heat, but this loss may be mitigated by the low SO temperatures. Such adaptations point to higher SO production rates than environmental conditions should otherwise permit, with implications for regional ecology and biogeochemistry.


英文关键词iron light temperature Southern Ocean phytoplankton
领域地球科学 ; 气候变化 ; 资源环境
收录类别SCI-E
WOS记录号WOS:000460242100069
WOS关键词PHYSIOLOGICAL-RESPONSES ; ELECTRON-TRANSPORT ; PHOTOSYSTEM-II ; QUANTUM YIELD ; LIMITATION ; GROWTH ; STRATEGIES ; PHOTOPHYSIOLOGY ; ASSIMILATION ; COASTAL
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
URL查看原文
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/205063
专题地球科学
资源环境科学
气候变化
作者单位1.Univ Tasmania, Antarctic Climate & Ecosyst Cooperat Res Ctr, Hobart, Tas 7001, Australia;
2.Univ Tasmania, Inst Marine & Antarctic Studies, Hobart, Tas 7001, Australia;
3.Univ N Carolina, Dept Marine Sci, Chapel Hill, NC 27599 USA
推荐引用方式
GB/T 7714
Strzepek, Robert F.,Boyd, Philip W.,Sunda, William G.. Photosynthetic adaptation to low iron, light, and temperature in Southern Ocean phytoplankton[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2019,116(10):4388-4393.
APA Strzepek, Robert F.,Boyd, Philip W.,&Sunda, William G..(2019).Photosynthetic adaptation to low iron, light, and temperature in Southern Ocean phytoplankton.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(10),4388-4393.
MLA Strzepek, Robert F.,et al."Photosynthetic adaptation to low iron, light, and temperature in Southern Ocean phytoplankton".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.10(2019):4388-4393.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Strzepek, Robert F.]的文章
[Boyd, Philip W.]的文章
[Sunda, William G.]的文章
百度学术
百度学术中相似的文章
[Strzepek, Robert F.]的文章
[Boyd, Philip W.]的文章
[Sunda, William G.]的文章
必应学术
必应学术中相似的文章
[Strzepek, Robert F.]的文章
[Boyd, Philip W.]的文章
[Sunda, William G.]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。