84 research outputs found
Marine algal flora of Graciosa Island, Azores
BACKGROUND: The macroalgal flora of Graciosa (central group of Azores archipelago) is poorly known, with only 116 species recorded so far (authors personal data). The published information reflects occasional collections from sporadic field visits to the Island. To overcome this, a thorough investigation under the Expedition “GRACIOSA/2004”, the Campaigns “PADEL/2006”, “MACROBIOLMOL/2014” and “PIMA-BALA/2017” involving sample collecting and presence data recording, was undertaken over an area of 19 km2 encompassing littoral and sublittoral levels down to about 40 m around the Island. This paper lists the taxonomic records and provides information on species ecology and occurrence around the Island improving the knowledge of the Azorean macroalgal flora at both local and regional scales.
NEW INFORMATION: A total of 1692 specimens belonging to 250 taxa of macroalgae (and including 55 taxa identified only at the genus level) are registered, comprising 166 Rhodophyta, 36 Chlorophyta and 48 Ochrophyta (Phaeophyceae). From these, 195 are identified to the species level (126 Rhodophyta, 31 Chlorophyta and 38 Ochrophyta) and comprise 156 native, 20 of uncertain origin and 14 introductions to the Island. Predaea feldmannii subsp. azorica Gabriel is an Azorean endemic, whereas Codium elisabethiae O.C. Schmidt, Botryocladia macaronesica Afonso-Carrillo, Sobrino, Tittley & Neto, Phyllophora gelidioides P.Crouan & H.Crouan ex Karsakoff and Laurencia viridis Gil-Rodríguez & Haroun represent Macaronesian endemics. Seventy-nine species are newly recorded to the algal flora of the Island.This research was supported by the projects “PADEL: Património natural e desenvolvimento sustentável do litoral dos Açores: a Ilha Graciosa como caso de estudo”, “MACROBIOMOL: Macroalgal biodiversity under molecular lens - towards a better understanding of North Atlantic biogeography”, “PIMA: Elaboração do programa de implementação da Diretiva-Quadro Estratégia Marinha - Programa invasoras marinhas nos Açores”, “BALA: Elaboração do programa de implementação da diretiva-quadro estratégia marinha - biodiversidade dos ambientes litorais dos Açores” and, most recently, by the project “ACORES-01-0145-FEDER-000072”, funded by the Operational Programme Azores 2020 (85% ERDF and 15% regional funds). Afonso Prestes was supported by a PhD grant (M3.1.a/F/083/2015) awarded by Fundo Regional da Ciência e Tecnologia (FRCT).info:eu-repo/semantics/publishedVersio
Distinct roles of class I and class III phosphatidylinositol 3-kinases in phagosome formation and maturation
Phagosomes acquire their microbicidal properties by fusion with lysosomes. Products of phosphatidylinositol 3-kinase (PI 3-kinase) are required for phagosome formation, but their role in maturation is unknown. Using chimeric fluorescent proteins encoding tandem FYVE domains, we found that phosphatidylinositol 3-phosphate (PI[3]P) accumulates greatly but transiently on the phagosomal membrane. Unlike the 3′-phosphoinositides generated by class I PI 3-kinases which are evident in the nascent phagosomal cup, PI(3)P is only detectable after the phagosome has sealed. The class III PI 3-kinase VPS34 was found to be responsible for PI(3)P synthesis and essential for phagolysosome formation. In contrast, selective ablation of class I PI 3-kinase revealed that optimal phagocytosis, but not maturation, requires this type of enzyme. These results highlight the differential functional role of the two families of kinases, and raise the possibility that PI(3)P production by VPS34 may be targeted during the maturation arrest induced by some intracellular parasites
Marine algal flora of Santa Maria Island, Azores
Este artículo contiene 41 páginas, 4 tablas, 15 figuras.Background
The algal flora of the Island of Santa Maria (eastern group of the Azores archipelago) has
attracted interest of researchers on past occasions (Drouët 1866, Agardh 1870, Trelease
1897, Schmidt 1931, Ardré et al. 1974, Fralick and Hehre 1990, Neto et al. 1991, Morton
and Britton 2000, Amen et al. 2005, Wallenstein and Neto 2006, Tittley et al. 2009,Wallenstein et al. 2009a, Wallenstein et al. 2010, Botelho et al. 2010, Torres et al. 2010,
León-Cisneros et al. 2011, Martins et al. 2014, Micael et al. 2014, Rebelo et al. 2014, Ávila
et al. 2015, Ávila et al. 2016, Machín-Sánchez et al. 2016, Uchman et al. 2016, Johnson et
al. 2017, Parente et al. 2018). Nevertheless, the Island macroalgal flora is not well-known
as published information reflects limited collections obtained in short-term visits by
scientists. To overcome this, a thorough investigation, encompassing collections and
presence data recording, was undertaken at both the littoral and sublittoral levels down to a
depth of approximately 40 m, covering an area of approximately 64 km . The resultant
taxonomic records are listed in the present paper which also provides information on
species ecology and occurrence around the Island, improving, thereby, the knowledge of
the Azorean macroalgal flora at both local and regional scales.
New information
A total of 2329 specimens (including some taxa identified only to genus level) belonging to
261 taxa of macroalgae are registered, comprising 152 Rhodophyta, 43 Chlorophyta and
66 Ochrophyta (Phaeophyceae). Of these, 174 were identified to species level (102
Rhodophyta, 29 Chlorophyta and 43 Ochrophyta), encompassing 52 new records for the
Island (30 Rhodophyta, 9 Chlorophyta and 13 Ochrophyta), 2 Macaronesian endemics
(Laurencia viridis Gil-Rodríguez & Haroun; and Millerella tinerfensis (Seoane-Camba)
S.M.Boo & J.M.Rico), 10 introduced (the Rhodophyta Acrothamnion preissii (Sonder)
E.M.Wollaston, Antithamnion hubbsii E.Y.Dawson, Asparagopsis armata Harvey,
Bonnemaisonia hamifera Hariot, Melanothamnus harveyi (Bailey) Díaz-Tapia & Maggs,
Scinaia acuta M.J.Wynne and Symphyocladia marchantioides (Harvey) Falkenberg; the
Chlorophyta Codium fragile subsp. fragile (Suringar) Hariot; and the Ochrophyta
Hydroclathrus tilesii (Endlicher) Santiañez & M.J.Wynne, and Papenfussiella kuromo
(Yendo) Inagaki) and 18 species of uncertain status (11 Rhodophyta, 3 Chlorophyta and 4
Ochrophyta).This research was supported by several projects, expeditions and campaigns (see Funding
above) and lately by the project “ACORES-01-0145-FEDER-000072” funded the
Operational Programme Azores 2020 (85% ERDF and 15% regional funds).Manuela
I. Parente was supported by a postdoctoral grant (SFRH/BPD/34246/2006) awarded by
Fundação para a Ciência e a Tecnologia (FCT). Eva Cacabelos was supported by a
postdoctoral grant (Project M1420-09-5369-FSE-000001) from ARDITI (Regional Agency
for Development of Research, Technology and Innovation of Madeira). Afonso C.L. Prestes
was supported by a PhD grant (M3.1.a/F/083/2015) awarded by Fundo Regional da
Ciência e Tecnologia (FRCT). Rita F. Patarra was supported by a Science and Technology
Management Fellowship grant (SFRH/BGCT/135478/2018) awarded by Fundação para a
Ciência e a Tecnologia, IP.Peer reviewe
Marine algal flora of São Miguel Island, Azores
Este artículo contiene 52 páginas, 4 tablas, 15 figuras.Background
The macroalgal flora of the Island of São Miguel (eastern group of the Azores Archipelago)
has attracted the interest of many researchers in the past, the first publications going back
to the nineteenth century. Initial studies were mainly taxonomic, resulting in the publication
of a checklist of the Azorean benthic marine algae. Later, the establishment of the
University of the Azores on the Island permitted the logistic conditions to develop both
temporal studies and long-term research and this resulted in a significant increase on
research directed at the benthic marine algae and littoral communities of the Island and
consequent publications.
Prior to the present paper, the known macroalgal flora of São Miguel Island comprised
around 260 species. Despite this richness, a significant amount of the research was never
made public, notably Masters and PhD theses encompassing information regarding
presence data recorded at littoral and sublittoral levels down to a depth of approximately
40 m around the Island and the many collections made, which resulted in vouchers
deposited in the AZB Herbarium Ruy Telles Palhinha and the LSM- Molecular Systematics
Laboratory at the Faculty of Sciences and Technology of the University of the Azores.
The present publication lists the macroalgal taxonomic records, together with information
on their ecology and occurrence around São Miguel Island, improving the knowledge of the
Azorean macroalgal flora at local and regional scales.
New information
A total of 12,781 specimens (including some identified only to genus) belonging to 431 taxa
of macroalgae are registered, comprising 284 Rhodophyta, 59 Chlorophyta and 88
Ochrophyta (Phaeophyceae). Of these, 323 were identified to species level (212
Rhodophyta, 48 Chlorophyta and 63 Ochrophyta), of which 61 are new records for the
Island (42 Rhodophyta, 9 Chlorophyta and 10 Ochrophyta), one an Azorean endemic
(Predaea feldmannii subsp. azorica Gabriel), five are Macaronesian endemisms (the red
algae Botryocladia macaronesica Afonso-Carrillo, Sobrino, Tittley & Neto, Laurencia viridis
Gil-Rodríguez & Haroun, Millerella tinerfensis (Seoane-Camba) S.M.Boo & J.M.Rico,
Phyllophora gelidioides P.Crouan & H.Crouan ex Karsakoff and the green alga Codium
elisabethiae O.C.Schmidt), 19 are introduced species (15 Rhodophyta, two Chlorophyta
and two Ochrophyta) and 32 are of uncertain status (21 Rhodophyta, five Chlorophyta and
six Ochrophyta).This research was supported by several projects, expeditions and campaigns (see Funding
above) and lately by the project “ACORES-01-0145-FEDER-000072” funded the
Operational Programme Azores 2020 (85% ERDF and 15% regional funds). Thanks are
due to the campaign teams for their critical involvement in this project (Abel Sentíes, Aina
del Alcázar, Ana Alfaya, Ana Belén Villalba Lapeña, Ana Santos, Ana Sofia Carreiro, André
Amaral, Andrea Tracana, Ane Laborda, Anna Lloveras Armengol, António Brigos Plafon,
Berta Solé Nadal, Camille Fontaine, Carlos Rius, Carles Mir, Caroline Terral, Catarina
Santos, Cláudia Hipólito, Daniela Gabriel, Edward Hehre, Emanuel Xavier, Eduardo
García, Enrique Almira, Esteban Belles, Eunice Nogueira, Fátima Vaz Pinto, Francisco
Wallenstein, Gustavo M Martins, Heather Baldwin, Isadora Moniz, Jana Verdura, Joana
Pombo, João Brum, João Faria Santos, João Ferreira, Laura Busquier, Marco Enoch,
Maria Ana Dionísio, Maria Machín-Sánchez, Maria Vale, Marlene Terra, Mónica Martínez,
Mutue Toyota Fujii, Patrícia Madeira, Pedro Raposeiro, Richard Fralick, Richard
Thompson, Rocío Sánchez, Ruben Couto, Rubén Mosquera, Rui Sousa, Sara Peres,
Tarso Costa, Tito Silva, Valeria Cassano, Virginie Leyendecker). Edgar Rosas Alquicira
and Karla León Cisneros were supported by the Programme AlBan, the European Union
Programme of High Level Scholarships for Latin America (through scholarships
E05D060221MX and E05D060520MX), “Consejo Nacional de Ciencia y Tecnología”
(doctoral scholarships 176162 and 157904) and the UNAMUNO Programme of PhD
Scholarships for Europe. Eva Cacabelos was supported by a postdoctoral grant (Project
M1420-09-5369-FSE-000002) from ARDITI (Regional Agency for Development of
Research, Technology and Innovation of Madeira). Andrea Z. Botelho was supported by a
PhD grant (M3.1.a/F/083/2015), awarded by Fundo Regional da Ciência e Tecnologia
(FRCT). Afonso C.L. Prestes was supported by a PhD grant (M3.1.a/F/083/2015), awarded
by Fundo Regional da Ciência e Tecnologia (FRCT). Rita F. Patarra was supported by a
Science and Technology Management Fellowship grant (SFRH/BGCT/135478/2018),
awarded by Fundação para a Ciência e a Tecnologia (FCT I.P.). Manuela I. Parente was
supported by a Postdoc grant (SFRH/BPD/34246/2006), awarded by Fundação para a
Ciência e a Tecnologia (FCT).Peer reviewe
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