globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1915276117
论文题名:
Algal photosynthesis converts nitric oxide into nitrous oxide
作者: Burlacot A.; Richaud P.; Gosset A.; Li-Beisson Y.; Peltier G.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:5
起始页码: 2704
结束页码: 2709
语种: 英语
英文关键词: Cytochrome P450 ; Flavodiiron ; Microalgae ; Nitrous oxide ; Photosynthesis
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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164340
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Burlacot A.,Richaud P.,Gosset A.,et al. Algal photosynthesis converts nitric oxide into nitrous oxide[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(5)
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