Luxury iron uptake and storage in pennate diatoms from the equatorial Pacific Ocean

Author:

Twining Benjamin S1ORCID,Baines Stephen B2

Affiliation:

1. Bigelow Laboratory for Ocean Sciences , East Boothbay, ME 04544, USA

2. Department of Ecology and Evolution, Stony Brook University , Stony Brook, NY 11794, USA

Abstract

Abstract Iron is a key micronutrient for ocean phytoplankton, and the availability of iron controls primary production and community composition in large regions of the ocean. Pennate diatoms, a phytoplankton group that responds to iron additions in low-iron areas, can have highly variable iron contents, and some groups such as Pseudo-nitzschia, are known to use ferritin to store iron for later use. We quantified and mapped the intracellular accumulation of iron by a natural population of Pseudo-nitzschia from the Fe-limited equatorial Pacific Ocean. A total of 48 h after iron addition, nearly half of the accumulated iron was localized in storage bodies adjacent to chloroplasts believed to represent ferritin. Over the subsequent 48 h, stored iron was distributed to the rest of the cell through subsequent growth and division, partially supporting the iron contents of the daughter cells. This study provides the first quantitative view into the cellular trafficking of iron in a globally relevant phytoplankton group and demonstrates the unique capabilities of synchrotron-based element imaging approaches.

Funder

National Science Foundation

U.S. Department of Energy

Publisher

Oxford University Press (OUP)

Subject

Metals and Alloys,Biochemistry,Biomaterials,Biophysics,Chemistry (miscellaneous)

Reference44 articles.

1. Processes and patterns of oceanic nutrient limitation;Moore;Nat. Geosci.,2013

2. Mesoscale iron enrichment experiments 1993–2005: synthesis and future directions;Boyd;Science,2007

3. Glacial-interglacial CO2 change: the iron hypothesis;Martin;Paleoceanography,1990

4. Iron fertilization of the subantarctic ocean during the last ice age;Martínez-García;Science,2014

5. Iron deficiency limits phytoplankton growth in the northeast Pacific subarctic;Martin;Nature,1988

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3