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| Registros recuperados: 10 | |
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| Wang, Na; Luo, Zhaohe; Mertens, Kenneth; Mccarthy, Francine M. G.; Gu, Li; Gu, Haifeng. |
| The dinophyceaen genus Gymnodinium was established with the freshwater species G. fuscum as type. According to Thessen et al. (2012), there are 268 species, with the majority marine species. In recently published molecular phylogenies based on ribosomal DNA sequences, Gymnodinium is polyphyletic. Here, a new freshwater Gymnodinium species, G. plasticum, is described from Plastic Lake, Ontario, Canada. Two strains were established by incubating single cysts, and their morphology was examined with light microscopy and scanning electron microscopy. The cyst had a rounded epicyst and hypocyst with a wide cingulum and smooth surface. Vegetative cells were characterized by an elongated nucleus running vertically and a deep sulcal intrusion. The apical structure... |
| Tipo: Text |
Palavras-chave: Apical structure complex; Cyst; Gymnodiniales sensu stricto; Gymnodinium fuscum. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00406/51731/53727.pdf |
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| Luo, Zhaohe; Mertens, Kenneth; Nezan, Elisabeth; Gu, Li; Pospelova, Vera; Thoha, Hikmah; Gu, Haifeng. |
| The dinoflagellate order Peridiniales encompasses several well circumscribed families. However, the family level of some genera, such as Bysmatrum and Vulcanodinium, has remained elusive for many years. Four Peridinium-like strains were established from the Atlantic coast of France and North Sulawesi, Indonesia through cyst germination or isolation of single cells. The cyst-theca relationship was established on specimens from the French Atlantic. Their morphologies were examined using light, scanning and transmission electron microscopy. The cells were characterized by a much larger epitheca relative to the hypotheca, a large anterior sulcal (Sa) plate deeply intruding the epitheca and a small first anterior intercalary plate. The plate formula was... |
| Tipo: Text |
Palavras-chave: Bysmatrum; Cyst; Dinoflagellate; Eyespot; Peridiniales; Plate overlap. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00489/60112/63564.pdf |
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| Luo, Zhaohe; Hu, Zhangxi; Tang, Yingzhong; Mertens, Kenneth; Leaw, Chui Pin; Lim, Po Teen; Teng, Sing Tung; Wang, Lei; Gu, Haifeng. |
| The genus Gymnodinium includes many morphologically similar species, but molecular phylogenies show that it is polyphyletic. Eight strains of Gymnodinium impudicum, Gymnodinium dorsalisulcum and a novel Gymnodinium‐like species from Chinese and Malaysian waters and the Mediterranean Sea were established. All of these strains were examined with LM, SEM and TEM. SSU, LSU and internal transcribed spacers rDNA sequences were obtained. A new genus, Wangodinium, was erected to incorporate strains with a loop‐shaped apical structure complex (ASC) comprising two rows of amphiesmal vesicles, here referred to as a new type of ASC. The chloroplasts of Wangodinium sinense are enveloped by two membranes. Pigment analysis shows that peridinin is the main accessory... |
| Tipo: Text |
Palavras-chave: Apical structure complex; Cyst; Dinoflagellate; Lepidodinium; Nuclear chambers; Pigment; Pyrenoid; Ultrastructure. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00454/56610/58307.pdf |
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| Berland, Brigitte R; Maestrini, Serge Y; Grzebyk, Daniel. |
| Some aspects of the life-cycle have been investigated in Dinophysis cf, acuminata, the dominant species of the genus along the French Atlantic coast, as well as in D, acuta; a few observations have also been made on the Mediterranean species D. pavillardi. Dinophysis cells occur in 2 clearly distinguished sizes. Small cells typically had a theca thinner than large cells, and cingular and sulcal lists were less developed. Both small and large cells were seen dividing, producing 1 to 4 round intracellular bodies. Some of these round bodies in turn contained many small flagellated cells which escaped through a pore and swam rapidly. Their behaviour after release, and how they might give rise to vegetative cells, has not been observed thus far; we do not... |
| Tipo: Text |
Palavras-chave: Dinophysis sp.; Life cycle; Cyst. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00258/36957/35626.pdf |
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| ASMUS, G. L.; TELES, T. S.. |
| O nematoide de cisto da soja (NCS), Heterodera glycines, é um dos principais fatores limitantes à produção de soja no Brasil. Desde a sua constatação na safra 1991/1992, o NCS distribuiu-se por praticamente todas as regiões produtoras de soja do País, estando presente atualmente em cerca de 2 milhões de hectares nos seguintes estados: Rio Grande do Sul, Paraná, São Paulo, Mato Grosso do Sul, Mato Grosso, Minas Gerais, Goiás, Tocantins, Maranhão e Bahia (EMBRAPA, 2009). Em Mato Grosso do Sul, o NCS permaneceu limitado às regiões Norte e Nordeste do estado, onde causa perdas consideráveis. |
| Tipo: Folhetos |
Palavras-chave: Nematoide de cisto da soja; Soybean; Cyst; Nematode; Heterodera Glycines; Soja; Brazil. |
| Ano: 2011 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/911927 |
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| Delebecq, Gaspard; Schmidt, Sabine; Ehrhold, Axel; Latimier, Marie; Siano, Raffaele. |
| The biological processes involved in the preservation, viability, and revival of long‐term dormant dinoflagellate cysts buried in sediments remain unknown. Based on studies of plant seed physiology, we tested whether the revival of ancient cysts preserved in century‐old sediments from the Bay of Brest (France) could be stimulated by melatonin and gibberellic acid, two molecules commonly used in seed priming. Dinoflagellates were revived from sediments dated to approximately 150 years ago (156 ± 27, 32 cm depth), extending the known record age of cyst viability previously established as around one century. A culture suspension of sediments mixed with melatonin and gibberellic acid solutions as biostimulants exhibited germination of 11 dinoflagellate taxa... |
| Tipo: Text |
Palavras-chave: Alexandrium; Cyst; Dinoflagellate; Gibberellic acid; Melatonin; Paleoecology; Priming; Scrippsiella; Resurrection ecology. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00627/73960/73321.pdf |
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| Registros recuperados: 10 | |
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