气候变化领域集成服务门户(CCPortal): Algal photosynthesis converts nitric oxide into nitrous oxide

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DOI	10.1073/pnas.1915276117
	Algal photosynthesis converts nitric oxide into nitrous oxide
	Burlacot A.; Richaud P.; Gosset A.; Li-Beisson Y.; Peltier G.
发表日期	2020
ISSN	0027-8424
起始页码	2704
结束页码	2709
卷号	117 期号:5
英文摘要	Nitrous oxide (N2O), a potent greenhouse gas in the atmosphere, is produced mostly from aquatic ecosystems, to which algae substantially contribute. However, mechanisms of N2O production by photosynthetic organisms are poorly described. Here we show that the green microalga Chlamydomonas reinhardtii reduces NO into N2O using the photosynthetic electron transport. Through the study of C. reinhardtii mutants deficient in flavodiiron proteins (FLVs) or in a cytochrome p450 (CYP55), we show that FLVs contribute to NO reduction in the light, while CYP55 operates in the dark. Both pathways are active when NO is produced in vivo during the reduction of nitrites and participate in NO homeostasis. Furthermore, NO reduction by both pathways is restricted to chlorophytes, organisms particularly abundant in ocean N2O-producing hot spots. Our results provide a mechanistic understanding of N2O production in eukaryotic phototrophs and represent an important step toward a comprehensive assessment of greenhouse gas emission by aquatic ecosystems. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Cytochrome P450; Flavodiiron; Microalgae; Nitrous oxide; Photosynthesis
语种	英语
scopus关键词	cytochrome c oxidase; cytochrome P450; heme; nitric oxide; nitrous oxide; cytochrome P450; nitric oxide; nitrous oxide; plant protein; aquatic environment; Article; binding affinity; biomass; carbon footprint; cell suspension; Chlamydomonas reinhardtii; chloroplast; controlled study; cytokine production; Fusarium oxysporum; gas exchange; homeostasis; illumination; mass spectrometry; membrane inlet mass spectrometry; nitrification; nonhuman; phase transition; photochemistry; photosynthesis; photosystem I; photosystem II; phototroph; priority journal; RNA interference; stoichiometry; structural homology; Chlamydomonas reinhardtii; genetics; metabolism; photosynthesis; phototrophy; Chlamydomonas reinhardtii; Cytochrome P-450 Enzyme System; Nitric Oxide; Nitrous Oxide; Photosynthesis; Phototrophic Processes; Plant Proteins
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/161069
作者单位	Burlacot, A., Aix Marseille Univ, CEA, CNRS, Institut de Biosciences et Biotechnologies Aix-Marseille, CEA Cadarache, Saint Paul-Lez-Durance, 13108, France; Richaud, P., Aix Marseille Univ, CEA, CNRS, Institut de Biosciences et Biotechnologies Aix-Marseille, CEA Cadarache, Saint Paul-Lez-Durance, 13108, France; Gosset, A., Aix Marseille Univ, CEA, CNRS, Institut de Biosciences et Biotechnologies Aix-Marseille, CEA Cadarache, Saint Paul-Lez-Durance, 13108, France; Li-Beisson, Y., Aix Marseille Univ, CEA, CNRS, Institut de Biosciences et Biotechnologies Aix-Marseille, CEA Cadarache, Saint Paul-Lez-Durance, 13108, France; Peltier, G., Aix Marseille Univ, CEA, CNRS, Institut de Biosciences et Biotechnologies Aix-Marseille, CEA Cadarache, Saint Paul-Lez-Durance, 13108, France
推荐引用方式 GB/T 7714	Burlacot A.,Richaud P.,Gosset A.,et al. Algal photosynthesis converts nitric oxide into nitrous oxide[J],2020,117(5).
APA	Burlacot A.,Richaud P.,Gosset A.,Li-Beisson Y.,&Peltier G..(2020).Algal photosynthesis converts nitric oxide into nitrous oxide.Proceedings of the National Academy of Sciences of the United States of America,117(5).
MLA	Burlacot A.,et al."Algal photosynthesis converts nitric oxide into nitrous oxide".Proceedings of the National Academy of Sciences of the United States of America 117.5(2020).