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	Provedor de dados Acta Botanica (1) ArchiMer (1) Autor Babin, Marcel (1) Bicalho,Elisa Monteze (1) Campbell, Douglas A. (1) Donaher, Natalie (1) Ferland, Joannie (1) Garcia,Queila Souza (1) Lacour, Thomas (1) Morin, Philippe-israël (1) Sciandra, Théo (1) Soares-da-Mota,Letícia A. (1) Mais... Palavra-chave Darkness (2) Arctic microalgae (1) Barbacenia (1) Diatom (1) Granitic outcrops (1) Growth rate (1) Inselbergs (1) Ironstone outcrops (1) Optimal temperature (1) Photosynthesis (1) Polar night (1) Quarzitic outcrops (1) Temperature (1) Vellozia (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Text (1) Ano 2019 (1) 2018 (1) País Brazil (1) France (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Decoupling light harvesting, electron transport and carbon fixation during prolonged darkness supports rapid recovery upon re-illumination in the Arctic diatom Chaetoceros neogracilis ArchiMer Lacour, Thomas; Morin, Philippe-israël; Sciandra, Théo; Donaher, Natalie; Campbell, Douglas A.; Ferland, Joannie; Babin, Marcel. During winter in the Arctic marine ecosystem, diatoms have to survive long periods of darkness caused by low sun elevations and the presence of sea ice covered by snow. To better understand how diatoms survive in the dark, we subjected cultures of the Arctic diatom Chaetoceros neogracilis to a prolonged period of darkness (1 month) and to light resupply. Chaetoceros neogracilis was not able to grow in the dark but cell biovolume remained constant after 1 month in darkness. Rapid resumption of photosynthesis and growth recovery was also found when the cells were transferred back to light at four different light levels ranging from 5 to 154 µmol photon m−2 s−1. This demonstrates the remarkable ability of this species to re-initiate growth over a wide range... Tipo: Text Palavras-chave: Arctic microalgae; Polar night; Diatom; Darkness; Photosynthesis; Growth rate; Temperature. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00499/61066/64597.pdf Temperature and light requirements for germination of species of Velloziaceae from different Brazilian rocky outcrops Acta Botanica Bicalho,Elisa Monteze; Soares-da-Mota,Letícia A.; Garcia,Queila Souza. ABSTRACT Germination is the first step to successful plant establishment. The range of factors that promote germination varies among species. Light and temperature requirements for the germination of species of Velloziaceae were investigated. Seeds of Barbacenia flava, B. markgrafii, B. purpurea, B. williamsi, Vellozia alata, V. compacta, V. glochidea and V. plicata were collected from rocky outcrops located in different Brazilian states and were incubated for germination at 10 to 40 °C in light or dark conditions. Seed mass and length were measured for each species. In general, all species exhibited a high germination percentage at temperatures of 15-40 °C in the light, with the optimal temperature being 25-30 °C for species of Barbacenia and 30 °C for... Tipo: Info:eu-repo/semantics/article Palavras-chave: Barbacenia; Darkness; Granitic outcrops; Inselbergs; Ironstone outcrops; Optimal temperature; Quarzitic outcrops; Vellozia. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200240 Registros recuperados: 2 Primeira ... 1 ... Última

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