Global S&T Development Trend Analysis Platform of Resources and Environment
Foraminifera Pumps Proton for Shell Formation- To buffer seawater against pH changes due to ocean acidification - | |
admin | |
2017-01-27 | |
发布年 | 2017 |
语种 | 英语 |
国家 | 日本 |
领域 | 资源环境 |
正文(英文) |
Overview A research team led by Dr. Takashi Toyofuku at Department of Marine Biodiversity Research & Dr. Miki Yamamoto-Matsuo at Department of Mathematical Science and Advanced Technology, the Japan Agency for Marine-Earth Science and Technology (JAMSTEC: Asahiko Taira, President) have found that foraminiferal calcification is driven by rapid transformation of bicarbonate into carbonate inside the cytoplasm with active outward proton pumping. Culturing experiments mimicking ocean acidification*i have also resulted in similar responses of calcification. The work was carried out in collaboration with NIOZ Royal Netherlands Institute for Sea Research and Utrecht University, University of the Ryukyus and Tokyo University of Marine Science and Technology. Foraminifera, unicellular marine organisms, typically produce a shell, which is commonly made of calcium carbonate in seawater, though the mechanism has not been fully revealed. By visualizing extracellular pH around benthic perforate foraminifera, the scientists demonstrated that the external pH rapidly decreases during chamber formation. It means that foraminifera precipitate calcium carbonate by maintaining pH in the site of calcification with proton pumping. In addition, when proton pumping is artificially inhibited with chemical agent in the experiments, the chamber formation becomes inactive. These results indicate that proton pumping stimulate chamber formation process in foraminifera. Ocean acidification is widely reported to reduce the ability of calcifying marine organisms to produce their shells and skeletons due to the reduction in carbonate saturation state as atmospheric CO2 levels increase. These findings will help further examine impacts of ongoing ocean acidification on other marine organisms like corals and shellfishes. This work was supported by JSPS KAKENHI Grant Numbers 22684027459 and 25247085. The above results were published the online Nature Communications on January 27, 2017 (JST).
Title: Proton pumping accompanies calcification in foraminifera Affiliations: 1Department of Marine Biodiversity Research, JAMSTEC 2Department of Mathematical Science and Advanced Technology, JAMSTEC 3 NIOZ Royal Netherlands Institute for Sea Research and Utrecht University 4Department of Physics and Earth Sciences, Faculty of Science and Tropical Biosphere Research Center, University of the Ryukyus 5Department of Earth Sciences – Geochemistry, Faculty of Geosciences, Utrecht University 6Department of Biogeochemistry, JAMSTEC 7Tokyo University of Marine Science and Technology *i Ocean acidification: Human activity produces 20Gt of CO2 per year, 30% of which is considered to be dissolved in seawater. According to reports by Intergovernmental Panel on Climate Change(IPCC), the pH in seawater is expected to decrease to 7.6-7.9 from the current 8.1 by 2100, indicating the progress of ocean acidification. ![]() Figure 1. (Left) An incubated specimen shows the two-dimensional variability in pH around it when building a new chamber. pH is quantified based on digital image analysis. The scale bar indicates 50μm. ![]() Figure 2. Foraminifera are single-celled marine organisms with shells. ![]() Figure 3. Proton pumping-based model of foraminiferal calcification. Foraminifera Pumps Proton for Shell Formation - To buffer seawater against pH changes due to ocean acidification - Contacts:
|
URL | 查看原文 |
来源平台 | Japan Agency for Marine-Earth Science and Technology |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/104367 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | admin. Foraminifera Pumps Proton for Shell Formation- To buffer seawater against pH changes due to ocean acidification -. 2017. |
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 |
[admin]的文章 |
百度学术 |
百度学术中相似的文章 |
[admin]的文章 |
必应学术 |
必应学术中相似的文章 |
[admin]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
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。
修改评论