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Ove Hoegh-guldberg - One of the best experts on this subject based on the ideXlab platform.
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Amino acid synthesis in the symbiotic sea anemone Aiptasia Pulchella
Marine Biology, 1998Co-Authors: R. Swanson, Ove Hoegh-guldbergAbstract:Symbiotic Aiptasia Pulchella and freshly isolated zooxanthellae were incubated in (NaHCO3)-C-14 and NH4Cl for 1 to 240 min, and samples were analysed by reverse-phase high-performance liquid chromatography (HPLC) and an online radiochemical detector. NH4+ was first assimilated into C-14-glutamate and C-14-glutamine in the zooxanthellae residing in A. Pulchella. The specific activities (dpm nmol(-1)) of C-14-glutamate and C-14-glutamine in vivo, were far greater in the zooxanthellae than in the host tissue, indicating that NH4+ was principally incorporated into the glutamate and glutamine pools of the zooxanthellae. C-14-alpha-ketoglutarate was taken up from the medium by intact A. Pulchella and assimilated into a small amount of C-14-glutamate in the host tissue, but no C-14-glutamine was detected in the host fraction. The C-14-glutamate that was synthesized was most likely produced from transamination reactions as opposed to the direct assimilation of NH4+. The free aminoacid composition of the host tissue and zooxanthellae of A. Pulchella was also measured. The results presented here demonstrate that NH4+ was initially assimilated by the zooxanthellae of A. Pulchella.
José Eduardo A. R. Marian - One of the best experts on this subject based on the ideXlab platform.
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The grass squid Pickfordiateuthis Pulchella is a paedomorphic loliginid.
Molecular phylogenetics and evolution, 2020Co-Authors: Frank E. Anderson, José Eduardo A. R. MarianAbstract:Abstract The wide disparity in adult body size observed both within and among animal taxa has long attracted widespread interest, with several general rules having been proposed to explain trends in body size evolution. Adult body size disparity among the cephalopod mollusks is remarkable, with adult body sizes ranging from a few centimeters to several meters. Some of the smallest cephalopods are found within Pickfordiateuthis, a group comprising three described species of squid found in the western Atlantic and tropical eastern Pacific. Pickfordiateuthis Pulchella, the type species of the genus, was initially proposed to be closely related to the loliginid squids (Loliginidae), with subsequent descriptions of additional species supporting a placement within Loliginidae. Pickfordiateuthis is remarkable in that all species reach sexual maturity at about one-fifth to one-tenth the size seen in most loliginid species. To date, no phylogenetic analyses have included representatives of Pickfordiateuthis. To infer the phylogenetic position of Pickfordiateuthis and explore its implications for body size evolution, we collected specimens of Pickfordiateuthis Pulchella from Brazilian waters and sequenced regions of two loci—the mitochondrial large ribosomal subunit (rrnL a.k.a. 16S) gene and the nuclear gene rhodopsin. Maximum likelihood and Bayesian analyses of these sequences support a placement of Pickfordiateuthis Pulchella as sister to a clade comprising the Western Hemisphere loliginid genera Doryteuthis and Lolliguncula. Analyses of body size evolution within Loliginidae suggest that a shift to a smaller body size optimum occurred along the lineage leading to P. Pulchella, with some evidence of shifts toward larger sizes in the ancestors of Loligo and Sepioteuthis; these inferences seem to be robust to phylogenetic uncertainty and incomplete taxon sampling. The small size and juvenile-like morphological traits seen in adult Pickfordiateuthis (e.g., sepiolid-like fins and biserial sucker arrangement in the tentacles) may be due to paedomorphosis.
Isac Almeida De Medeiros - One of the best experts on this subject based on the ideXlab platform.
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vasorelaxation induced by dictyota Pulchella dictyotaceae a brown alga is mediated via inhibition of calcium influx in rats
Marine Drugs, 2011Co-Authors: Thyago M Queiroz, Natalia T Machado, Fabiola Fialho Furtado, Abrahao Alves De Oliveirafilho, Maria C Alustau, Camila S Figueiredo, George Emmanuel Cavalcanti De Miranda, Valdir A Braga, Jose Maria Barbosafilho, Isac Almeida De MedeirosAbstract:This study aimed to investigate the cardiovascular effects elicited by Dictyota Pulchella, a brown alga, using in vivo and in vitro approaches. In normotensive conscious rats, CH2Cl2/MeOH Extract (CME, 5, 10, 20 and 40 mg/kg) from Dictyota Pulchella produced dose-dependent hypotension (−4 ± 1; −8 ± 2; −53 ± 8 and −63 ± 3 mmHg) and bradycardia (−8 ± 6; −17 ± 11; −257 ± 36 and −285 ± 27 b.p.m.). In addition, CME and Hexane/EtOAc Phase (HEP) (0.01–300 µg/mL) from Dictyota Pulchella induced a concentration-dependent relaxation in phenylephrine (Phe, 1 µM)-pre-contracted mesenteric artery rings. The vasorelaxant effect was not modified by the removal of the vascular endothelium or pre-incubation with KCl (20 mM), tetraethylammonium (TEA, 3 mM) or tromboxane A2 agonist U-46619 (100 nM). Furthermore, CME and HEP reversed CaCl2-induced vascular contractions. These results suggest that both CME and HEP act on the voltage-operated calcium channel in order to produce vasorelaxation. In addition, CME induced vasodilatation after the vessels have been pre-contracted with L-type Ca2+ channel agonist (Bay K 8644, 200 nM). Taken together, our data show that CME induces hypotension and bradycardia in vivo and that both CME and HEP induce endothelium-independent vasodilatation in vitro that seems to involve the inhibition of the Ca2+ influx through blockade of voltage-operated calcium channels.
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vasorelaxation induced by dictyota Pulchella dictyotaceae a brown alga is mediated via inhibition of calcium influx in rats
Marine Drugs, 2011Co-Authors: Thyago M Queiroz, Natalia T Machado, Fabiola Fialho Furtado, Abrahao Alves De Oliveirafilho, Maria C Alustau, Camila S Figueiredo, George Emmanuel Cavalcanti De Miranda, Valdir A Braga, Jose Maria Barbosafilho, Isac Almeida De MedeirosAbstract:Abstract: This study aimed to investigate the cardiovascular effects elicited by Dictyota Pulchella , a brown alga, using in vivo and in vitro approaches. In normotensive conscious rats, CH 2 Cl 2 /MeOH Extract (CME, 5, 10, 20 and 40 mg/kg) from Dictyota Pulchella produced dose-dependent hypotension (−4 ± 1; −8 ± 2; −53 ± 8 and −63 ± 3 mmHg) and bradycardia (−8 ± 6; −17 ± 11; −257 ± 36 and −285 ± 27 b.p.m.). In addition, CME and Hexane/EtOAc Phase (HEP) (0.01–300 µg/mL) from Dictyota Pulchella induced a concentration-dependent relaxation in phenylephrine (Phe, 1 µM)-pre-contracted mesenteric artery rings. The vasorelaxant effect was not modified by the removal of the vascular endothelium or pre-incubation with KCl (20 mM), tetraethylammonium (TEA, 3 mM) or tromboxane A 2 agonist U-46619 (100 nM). Furthermore, CME and HEP reversed CaCl 2 -induced vascular contractions. These results suggest that both CME and HEP act on the voltage-operated calcium channel in order to produce vasorelaxation. In addition, CME induced vasodilatation after the vessels have been pre-contracted with L-type Ca
Walter D. Gubler - One of the best experts on this subject based on the ideXlab platform.
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Calosphaeria Canker of Sweet Cherry Caused by Calosphaeria Pulchella in California and South Australia.
Plant disease, 2012Co-Authors: Florent P. Trouillas, F. Peduto, J. D. Lorber, Mark Sosnowski, Joseph A. Grant, W. W. Coates, K. K. Anderson, J. L. Caprile, Walter D. GublerAbstract:Trouillas, F. P., Peduto, F., Lorber, J. D., Sosnowski, M. R., Grant, J., Coates, W. W., Anderson, K. K., Caprile, J., and Gubler, W. D. 2012. Calosphaeria canker of sweet cherry caused by Calosphaeria Pulchella in California and South Australia. Plant Dis. 96:648-658. California is the second largest sweet cherry producer in the United States with annual revenues up to $200 million. The South Australian cherry industry generates about 10% of Australia’s overall production with approximately 1,500 metric tons of cherries produced yearly. In California, perennial canker diseases and subsequent branch dieback are responsible for extensive damage throughout sweet cherry orchards, reducing annual yields and tree longevity. Surveys of cherry orchards and isolation work were conducted in California to identify the main canker-causing agents. Calosphaeria Pulchella was the main fungus isolated from cankers, followed by Eutypa lata and Leucostoma persoonii, respectively. Preliminary surveys in cherry orchards in South Australia documented C. Pulchella and L. persoonii in cankers. The pathogenicity of C. Pulchella in sweet cherry was confirmed following field inoculations of 2- to 3-year-old branches. C. Pulchella was able to infect healthy wood and produce cankers with as much virulence as E. lata or L. persoonii. Spore trapping studies were conducted in two sweet cherry orchards in California to investigate the seasonal abundance of C. Pulchella spores. Experiments showed that rain and sprinkler irrigation were important factors for aerial dissemination. Finally, this study illustrates the symptoms and signs of the new disease Calosphaeria canker.
Fabio Conti - One of the best experts on this subject based on the ideXlab platform.
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Morphometric study and taxonomy of Genista Pulchella Vis. s.l. (Fabaceae), a south European species
Botanical Journal of the Linnean Society, 2007Co-Authors: Fabio ContiAbstract:A morphometric study of the known populations of Genista Pulchella has been undertaken, based on herbarium specimens and field research. This has made it possible to provide a new taxonomic outline as the disjunct populations of G. Pulchella (western part of the Balkan peninsula, central Italy and southern France) seem to be distinct. A new taxon is described: G. Pulchella ssp. aquilana ssp. nov. (central Italy), a new combination G. Pulchella ssp. villarsiana comb. nov. is proposed for the population from southern France, while G. Pulchella ssp. Pulchella can be considered endemic to the Balkan Peninsula. Genista Pulchella Vis., G. villarsii Clementi and G. villarsiana Jord. are lectotypified. © 2007 The Linnean Society of London, Botanical Journal of the Linnean Society, 2007, 153, 245–254.
