The complex effects of ocean acidification on the prominent N 2 -fixing cyanobacterium Trichodesmium

Autor:	Zuozhu Wen, Dalin Shi, Haizheng Hong, Wenfang Lin, Shuh-Ji Kao, François M. M. Morel, Siwei Chang, Ya-Wei Luo, Futing Zhang, Rong Shen, Sven A. Kranz
Rok vydání:	2017
Předmět:	0301 basic medicine Multidisciplinary 010504 meteorology & atmospheric sciences Nitrogenase Ocean acidification Biology biology.organism_classification 01 natural sciences 03 medical and health sciences chemistry.chemical_compound 030104 developmental biology Trichodesmium chemistry Environmental chemistry Thylakoid Carbon dioxide Botany Phytoplankton Seawater Adenosine triphosphate 0105 earth and related environmental sciences
Zdroj:	Science. 356:527-531
ISSN:	1095-9203 0036-8075
DOI:	10.1126/science.aal2981
Popis:	Acidification of seawater caused by anthropogenic carbon dioxide (CO 2 ) is anticipated to influence the growth of dinitrogen (N 2 )–fixing phytoplankton, which contribute a large fraction of primary production in the tropical and subtropical ocean. We found that growth and N 2 -fixation of the ubiquitous cyanobacterium Trichodesmium decreased under acidified conditions, notwithstanding a beneficial effect of high CO 2 . Acidification resulted in low cytosolic pH and reduced N 2 -fixation rates despite elevated nitrogenase concentrations. Low cytosolic pH required increased proton pumping across the thylakoid membrane and elevated adenosine triphosphate production. These requirements were not satisfied under field or experimental iron-limiting conditions, which greatly amplified the negative effect of acidification.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::53c895c7cb5bbe69de93d5d1c54574e7 https://doi.org/10.1126/science.aal2981 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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