Proteomic responses to ocean acidification of the marine diazotroph Trichodesmium under iron-replete and iron-limited conditions

Abstract(#br)Growth and dinitrogen (N 2 ) fixation of the globally important diazotrophic cyanobacteria Trichodesmium are often limited by iron (Fe) availability in surface seawaters. To systematically examine the combined effects of Fe limitation and ocean acidification (OA), T. erythraeum strain I...

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Bibliographic Details
Published in:Photosynthesis Research
Main Authors: Futing Zhang, Haizheng Hong, Sven A. Kranz, Rong Shen, Wenfang Lin, Dalin Shi
Format: Article in Journal/Newspaper
Language:Chinese
Published: 2019
Subjects:
Ocean acidification
Photosynthesis
Nitrogen fixation
Diazotrophs
Iron limitation
Online Access:https://doi.org/10.1007/s11120-019-00643-8
https://dspace.xmu.edu.cn/handle/2288/176637
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Summary:Abstract(#br)Growth and dinitrogen (N 2 ) fixation of the globally important diazotrophic cyanobacteria Trichodesmium are often limited by iron (Fe) availability in surface seawaters. To systematically examine the combined effects of Fe limitation and ocean acidification (OA), T. erythraeum strain IMS101 was acclimated to both Fe-replete and Fe-limited concentrations under ambient and acidified conditions. Proteomic analysis showed that OA affected a wider range of proteins under Fe-limited conditions compared to Fe-replete conditions. OA also led to an intensification of Fe deficiency in key cellular processes (e.g., photosystem I and chlorophyll a synthesis) in already Fe-limited T. erythraeum . This is a result of reallocating Fe from these processes to Fe-rich nitrogenase to.

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