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Gonçalves PR, Di Dario F, Petry AC, Martins RL, da Fonseca RN, Henry MD, de Assis Esteves F, Ruiz-Miranda CR, Monteiro LR, Nascimento MT. Brazil undermines parks by relocating staff. Science 2020; 368:1199. [PMID: 32527824 DOI: 10.1126/science.abc8297] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Pablo R Gonçalves
- Instituto de Biodiversidade e Sustentabilidade - NUPEM/UFRJ, Universidade Federal do Rio de Janeiro, Macaé, RJ 27965-045, Brazil.
| | - Fabio Di Dario
- Instituto de Biodiversidade e Sustentabilidade - NUPEM/UFRJ, Universidade Federal do Rio de Janeiro, Macaé, RJ 27965-045, Brazil
| | - Ana C Petry
- Instituto de Biodiversidade e Sustentabilidade - NUPEM/UFRJ, Universidade Federal do Rio de Janeiro, Macaé, RJ 27965-045, Brazil
| | - Rodrigo L Martins
- Instituto de Biodiversidade e Sustentabilidade - NUPEM/UFRJ, Universidade Federal do Rio de Janeiro, Macaé, RJ 27965-045, Brazil
| | - Rodrigo N da Fonseca
- Instituto de Biodiversidade e Sustentabilidade - NUPEM/UFRJ, Universidade Federal do Rio de Janeiro, Macaé, RJ 27965-045, Brazil
| | - Malinda D Henry
- Instituto de Biodiversidade e Sustentabilidade - NUPEM/UFRJ, Universidade Federal do Rio de Janeiro, Macaé, RJ 27965-045, Brazil
| | - Francisco de Assis Esteves
- Instituto de Biodiversidade e Sustentabilidade - NUPEM/UFRJ, Universidade Federal do Rio de Janeiro, Macaé, RJ 27965-045, Brazil
| | - Carlos R Ruiz-Miranda
- Laboratório de Ciências Ambientais, Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, RJ 28013-602, Brazil.,Associação Mico-Leão-Dourado, Silva Jardim, RJ 28820-000, Brazil
| | - Leandro R Monteiro
- Laboratório de Ciências Ambientais, Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, RJ 28013-602, Brazil
| | - Marcelo T Nascimento
- Laboratório de Ciências Ambientais, Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, RJ 28013-602, Brazil
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Rocco-Machado N, Cosentino-Gomes D, Nascimento MT, Paes-Vieira L, Khan YA, Mittra B, Andrews NW, Meyer-Fernandes JR. Leishmania amazonensis ferric iron reductase (LFR1) is a bifunctional enzyme: Unveiling a NADPH oxidase activity. Free Radic Biol Med 2019; 143:341-353. [PMID: 31446054 DOI: 10.1016/j.freeradbiomed.2019.08.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 08/21/2019] [Indexed: 01/26/2023]
Abstract
Leishmania amazonensis is one of leishmaniasis' causative agents, a disease that has no cure and leads to the appearance of cutaneous lesions. Recently, our group showed that heme activates a Na+/K+ ATPase in these parasites through a signaling cascade involving hydrogen peroxide (H2O2) generation. Heme has a pro-oxidant activity and signaling capacity, but the mechanism by which this molecule increases H2O2 levels in L. amazonensis has not been elucidated. Here we investigated the source of H2O2 stimulated by heme, ruling out the participation of mitochondria and raising the possibility of a role for a NADPH oxidase (Nox) activity. Despite the absence of a classical Nox sequence in trypanosomatid genomes, L. amazonensis expresses a surface ferric iron reductase (LFR1). Interestingly, Nox enzymes are thought to have evolved from ferric iron reductases because they share same core domain and are very similar in structure. The main difference is that Nox catalyses electron flow from NADPH to oxygen, generating reactive oxygen species (ROS), while ferric iron reductase promotes electron flow to ferric iron, generating ferrous iron. Using L. amazonensis overexpressing or knockout for LFR1 and heterologous expression of LFR1 in mammalian embryonic kidney (HEK 293) cells, we show that this enzyme is bifunctional, being able to generate both ferrous iron and H2O2. It was previously described that protozoans knockout for LFR1 have their differentiation to virulent forms (amastigote and metacyclic promastigote) impaired. In this work, we observed that LFR1 overexpression stimulates protozoan differentiation to amastigote forms, reinforcing the importance of this enzyme in L. amazonensis life cycle regulation. Thus, we not only identified a new source of ROS production in Leishmania, but also described, for the first time, an enzyme with both ferric iron reductase and Nox activities.
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Affiliation(s)
- N Rocco-Machado
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro (UFRJ), CCS, Cidade Universitária, Ilha do Fundão, 21941-590, Rio de Janeiro, RJ, Brazil; Institute of National Science and Technology of Structural Biology and Bioimage (INCTBEB), CCS, Cidade Universitária, Ilha do Fundão, 21941-590, Rio de Janeiro, RJ, Brazil
| | - D Cosentino-Gomes
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro (UFRJ), CCS, Cidade Universitária, Ilha do Fundão, 21941-590, Rio de Janeiro, RJ, Brazil; Institute of National Science and Technology of Structural Biology and Bioimage (INCTBEB), CCS, Cidade Universitária, Ilha do Fundão, 21941-590, Rio de Janeiro, RJ, Brazil; Institute of Chemistry, Department of Biochemistry, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
| | - M T Nascimento
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro (UFRJ), CCS, Cidade Universitária, Ilha do Fundão, 21941-590, Rio de Janeiro, RJ, Brazil; Institute of National Science and Technology of Structural Biology and Bioimage (INCTBEB), CCS, Cidade Universitária, Ilha do Fundão, 21941-590, Rio de Janeiro, RJ, Brazil
| | - L Paes-Vieira
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro (UFRJ), CCS, Cidade Universitária, Ilha do Fundão, 21941-590, Rio de Janeiro, RJ, Brazil; Institute of National Science and Technology of Structural Biology and Bioimage (INCTBEB), CCS, Cidade Universitária, Ilha do Fundão, 21941-590, Rio de Janeiro, RJ, Brazil
| | - Y A Khan
- Department of Cell Biology and Molecular Genetics, University of Maryland, 20742, College Park, MD, United States
| | - B Mittra
- Department of Cell Biology and Molecular Genetics, University of Maryland, 20742, College Park, MD, United States
| | - N W Andrews
- Department of Cell Biology and Molecular Genetics, University of Maryland, 20742, College Park, MD, United States
| | - J R Meyer-Fernandes
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro (UFRJ), CCS, Cidade Universitária, Ilha do Fundão, 21941-590, Rio de Janeiro, RJ, Brazil; Institute of National Science and Technology of Structural Biology and Bioimage (INCTBEB), CCS, Cidade Universitária, Ilha do Fundão, 21941-590, Rio de Janeiro, RJ, Brazil.
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Mitchard ETA, Feldpausch TR, Brienen RJW, Lopez-Gonzalez G, Monteagudo A, Baker TR, Lewis SL, Lloyd J, Quesada CA, Gloor M, ter Steege H, Meir P, Alvarez E, Araujo-Murakami A, Aragão LEOC, Arroyo L, Aymard G, Banki O, Bonal D, Brown S, Brown FI, Cerón CE, Chama Moscoso V, Chave J, Comiskey JA, Cornejo F, Corrales Medina M, Da Costa L, Costa FRC, Di Fiore A, Domingues TF, Erwin TL, Frederickson T, Higuchi N, Honorio Coronado EN, Killeen TJ, Laurance WF, Levis C, Magnusson WE, Marimon BS, Marimon Junior BH, Mendoza Polo I, Mishra P, Nascimento MT, Neill D, Núñez Vargas MP, Palacios WA, Parada A, Pardo Molina G, Peña-Claros M, Pitman N, Peres CA, Poorter L, Prieto A, Ramirez-Angulo H, Restrepo Correa Z, Roopsind A, Roucoux KH, Rudas A, Salomão RP, Schietti J, Silveira M, de Souza PF, Steininger MK, Stropp J, Terborgh J, Thomas R, Toledo M, Torres-Lezama A, van Andel TR, van der Heijden GMF, Vieira ICG, Vieira S, Vilanova-Torre E, Vos VA, Wang O, Zartman CE, Malhi Y, Phillips OL. Markedly divergent estimates of Amazon forest carbon density from ground plots and satellites. Glob Ecol Biogeogr 2014; 23:935-946. [PMID: 26430387 PMCID: PMC4579864 DOI: 10.1111/geb.12168] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
AIM The accurate mapping of forest carbon stocks is essential for understanding the global carbon cycle, for assessing emissions from deforestation, and for rational land-use planning. Remote sensing (RS) is currently the key tool for this purpose, but RS does not estimate vegetation biomass directly, and thus may miss significant spatial variations in forest structure. We test the stated accuracy of pantropical carbon maps using a large independent field dataset. LOCATION Tropical forests of the Amazon basin. The permanent archive of the field plot data can be accessed at: http://dx.doi.org/10.5521/FORESTPLOTS.NET/2014_1. METHODS Two recent pantropical RS maps of vegetation carbon are compared to a unique ground-plot dataset, involving tree measurements in 413 large inventory plots located in nine countries. The RS maps were compared directly to field plots, and kriging of the field data was used to allow area-based comparisons. RESULTS The two RS carbon maps fail to capture the main gradient in Amazon forest carbon detected using 413 ground plots, from the densely wooded tall forests of the north-east, to the light-wooded, shorter forests of the south-west. The differences between plots and RS maps far exceed the uncertainties given in these studies, with whole regions over- or under-estimated by > 25%, whereas regional uncertainties for the maps were reported to be < 5%. MAIN CONCLUSIONS Pantropical biomass maps are widely used by governments and by projects aiming to reduce deforestation using carbon offsets, but may have significant regional biases. Carbon-mapping techniques must be revised to account for the known ecological variation in tree wood density and allometry to create maps suitable for carbon accounting. The use of single relationships between tree canopy height and above-ground biomass inevitably yields large, spatially correlated errors. This presents a significant challenge to both the forest conservation and remote sensing communities, because neither wood density nor species assemblages can be reliably mapped from space.
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Affiliation(s)
- Edward T A Mitchard
- School of GeoSciences, University of EdinburghEdinburgh, EH9 3JN, UK
- *Correspondence: Edward T. A. Mitchard, School of GeoSciences, University of Edinburgh, Crew Building, The King's Buildings, Edinburgh, EH9 3JN, UK., E-mail:
| | - Ted R Feldpausch
- School of Geography, University of LeedsLeeds, LS2 9JT, UK
- Geography, College of Life and Environmental Sciences, University of ExeterExeter, EX4 4RJ, UK
| | | | | | | | | | - Simon L Lewis
- School of Geography, University of LeedsLeeds, LS2 9JT, UK
- Department of Geography, University College LondonUK
| | - Jon Lloyd
- Faculty of Natural Sciences, Department of Life Sciences, Imperial CollegeLondon, UK
| | | | - Manuel Gloor
- School of Geography, University of LeedsLeeds, LS2 9JT, UK
| | - Hans ter Steege
- Naturalis Biodiversity CenterLeiden, the Netherlands
- Institute of Environmental Biology, Utrecht UniversityUtrecht, the Netherlands
| | - Patrick Meir
- School of GeoSciences, University of EdinburghEdinburgh, EH9 3JN, UK
- Research School of Biology, Australian National UniversityCanberra, ACT, 0200, Australia
| | - Esteban Alvarez
- Jardín Botánico de Medellín, Grupo de Investigación en Servicios Ecosistémicos y Cambio ClimáticoMedellin, Colombia
| | - Alejandro Araujo-Murakami
- Museo de Historia Natural Noel Kempff Mercado, Universidad Autónoma Gabriel René MorenoCasilla 2489, Av. Irala 565, Santa Cruz, Bolivia
| | - Luiz E O C Aragão
- Geography, College of Life and Environmental Sciences, University of ExeterExeter, EX4 4RJ, UK
- Remote Sensing Division, National Institute for Space Research – INPESão José dos Campos, SP, Brazil
| | - Luzmila Arroyo
- Museo de Historia Natural Noel Kempff Mercado, Universidad Autónoma Gabriel René MorenoCasilla 2489, Av. Irala 565, Santa Cruz, Bolivia
| | - Gerardo Aymard
- UNELLEZ-Guanare, Programa de Ciencias del Agro y el Mar, Herbario Universitario (PORT)Mesa de Cavacas, Estado Portuguesa, 3350, Venezuela
| | - Olaf Banki
- IBED, University of AmsterdamPOSTBUS 94248, 1090 GE, Amsterdam, the Netherlands
| | - Damien Bonal
- L'Institut National de la Recherche AgronomiqueUMR 1137 EEF, 54280, Champenoux, France
| | - Sandra Brown
- Ecosystem Services Unit, Winrock InternationalArlington, VA, 22202, USA
| | - Foster I Brown
- Woods Hole Research CenterFalmouth, MA, USA
- Universidade Federal do Acre, Centro de Ciências Biológicas e da NaturezaRio Branco, AC, 69910-900, Brazil
| | - Carlos E Cerón
- Herbario Alfredo Paredes (QAP), Universidad Central del EcuadorQuito, Ecuador
| | | | - Jerome Chave
- Université Paul Sabatier, Laboratoire EDBbâtiment 4R3, 31062, Toulouse, France
| | | | - Fernando Cornejo
- Universidad Nacional Agraria La Molina, Facultad de Ciencias ForestalesLima, Peru
| | | | - Lola Da Costa
- Geociencias, Universidade Federal de ParaBelem, Brazil
| | | | | | - Tomas F Domingues
- FFCLRP-USP, Department of Biology, Universidade de São Paulo05508-090, Brazil
| | - Terry L Erwin
- Department of Entomology, Smithsonian InstitutionP.O. Box 37012, MRC 187, Washington, DC, 20013-7012, USA
| | | | - Niro Higuchi
- Instituto Nacional de Pesquisas da AmazôniaManaus, Brazil
| | - Euridice N Honorio Coronado
- School of Geography, University of LeedsLeeds, LS2 9JT, UK
- Instituto de Investigaciones de la Amazonía PeruanaAv. José A. Quiñones km. 2.5, Iquitos, Peru
| | - Tim J Killeen
- World Wildlife Fund1250 24th Street, N.W., Washington, DC, 20037, USA
| | - William F Laurance
- Centre for Tropical Environmental and Sustainability Science (TESS), School of Marine and Tropical Biology, James Cook UniversityCairns, Queensland, 4878, Australia
| | - Carolina Levis
- Instituto Nacional de Pesquisas da AmazôniaManaus, Brazil
| | | | - Beatriz S Marimon
- Universidade do Estado de Mato Grosso, Campus de Nova XavantinaCaixa Postal 08, CEP 78.690-000, Nova Xavantina, MT, Brazil
| | - Ben Hur Marimon Junior
- Universidade do Estado de Mato Grosso, Campus de Nova XavantinaCaixa Postal 08, CEP 78.690-000, Nova Xavantina, MT, Brazil
| | - Irina Mendoza Polo
- Jardín Botánico de Medellín, Grupo de Investigación en Servicios Ecosistémicos y Cambio ClimáticoMedellin, Colombia
| | - Piyush Mishra
- Department of Civil Engineering, Indian Institute of TechnologyRoorkee, Uttarakhand, 247667, India
| | - Marcelo T Nascimento
- Centro de Biociências e Biotecnologia, Universidade Estadual do Norte FlumineseCampos dos Goytacazes, RJ, Brasil
| | - David Neill
- Puyo, Universidad Estatal AmazónicaPaso lateral km 2½ via a Napo, Pastaza, Ecuador
| | | | - Walter A Palacios
- Escuela de Ingeniería Forestal, Universidad Técnica del NorteEcuador
| | - Alexander Parada
- Museo de Historia Natural Noel Kempff Mercado, Universidad Autónoma Gabriel René MorenoCasilla 2489, Av. Irala 565, Santa Cruz, Bolivia
| | | | - Marielos Peña-Claros
- Forest Ecology and Forest Management Group, Wageningen UniversityP.O. Box 47, 6700 AA, Wageningen, the Netherlands
- Instituto Boliviano de Investigación ForestalSanta Cruz, Bolivia
| | - Nigel Pitman
- Center for Tropical Conservation, Duke UniversityBox 90381, Durham, NC, 27708, USA
| | - Carlos A Peres
- Centre for Biodiversity Research, School of Environmental Sciences, University of East AngliaNorwich, NR4 7JT, UK
| | - Lourens Poorter
- Forest Ecology and Forest Management Group, Wageningen UniversityP.O. Box 47, 6700 AA, Wageningen, the Netherlands
| | - Adriana Prieto
- Instituto de Ciencias Naturales, Universidad Nacional de ColombiaBogota, Colombia
| | | | - Zorayda Restrepo Correa
- Jardín Botánico de Medellín, Grupo de Investigación en Servicios Ecosistémicos y Cambio ClimáticoMedellin, Colombia
| | - Anand Roopsind
- Department of Biology, University of FloridaP.O. 118526, 511 Bartram Hall, Gainesville, FL, 32611-8526, USA
| | | | | | - Rafael P Salomão
- Museu Paraense Emilio GoeldiAv. Magalhães Barata, 376, São Braz, 66040-170, Belém, PA, Brazil
| | | | - Marcos Silveira
- Universidade Federal do Acre, Centro de Ciências Biológicas e da NaturezaRio Branco, AC, 69910-900, Brazil
| | | | - Marc K Steininger
- Center for Applied Biodiversity Science, Conservation InternationalWashington, DC, USA
| | - Juliana Stropp
- Institute for Environment and Sustainability, Joint Research Centre of the European CommissionVia Enrico Fermi, 2748 TP 440, I-21027, Ispra, Italy
| | - John Terborgh
- Nicholas School of the Environment, Duke UniversityBox 90381, Durham, NC, 27708, USA
| | - Raquel Thomas
- Iwokrama International Centre77 High Street Kingston, Georgetown, Guyana
| | - Marisol Toledo
- Instituto Boliviano de Investigación ForestalSanta Cruz, Bolivia
- Universidad Autónoma Gabriel René MorenoSanta Cruz, Bolivia
| | | | | | - Geertje M F van der Heijden
- University of Wisconsin-MilwaukeeP.O Box 413, Milwaukee, WI, 53201, USA
- Smithsonian Tropical Research InstituteApartado, Postal 0843-03092, Panamá, Panama
| | - Ima C G Vieira
- Museu Paraense Emilio GoeldiAv. Magalhães Barata, 376, São Braz, 66040-170, Belém, PA, Brazil
| | - Simone Vieira
- Núcleo de Estudos e Pesquisas Ambientais, Universidade Estadual de CampinasCampinas, Brazil
| | | | - Vincent A Vos
- Escuela de Ingeniería Forestal, Universidad Técnica del NorteEcuador
| | - Ophelia Wang
- Lab of Landscape Ecology and Conservation Biology, Northern Arizona UniversityFlagstaff, AZ, USA
| | | | - Yadvinder Malhi
- School of Geography and the Environment, University of OxfordOxford, UK
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