| quantification of selected endogenous hydroxy-oxylipins from tropical marine macroalgae. | the present study investigated the contents of hydroxy-oxylipins hydroxyoctadecadienoic acids (hodes), hydroxyoctadecatrienoic acids (hotres), and hydroxyeicosatetraenoic acids (hetes) in 40 macroalgae belonging to the chlorophyceae, rhodophyceae and, phaeophyceae. the hydroxy-oxylipin content was low and ranged from 0.14 ± 0.012 ng/g (codium dwarkense) to 8,161.9 ± 253 ng/g (chaetomorpha linum) among the chlorophyceae, 345.4 ± 56.8 ng/g (scytosiphon lomentaria) to 2,574.5 ± 155.5 ng/g (stoechos ... | 2014 | 24052492 |
| changes in epiphytic bacterial communities of intertidal seaweeds modulated by host, temporality, and copper enrichment. | this study reports on the factors involved in regulating the composition and structure of bacterial communities epiphytic on intertidal macroalgae, exploring their temporal variability and the role of copper pollution. culture-independent, molecular approaches were chosen for this purpose and three host species were used as models: the ephemeral ulva spp. (chlorophyceae) and scytosiphon lomentaria (phaeophyceae) and the long-living lessonia nigrescens (phaeophyceae). the algae were collected fro ... | 2010 | 20333374 |
| differential responses to copper-induced oxidative stress in the marine macroalgae lessonia nigrescens and scytosiphon lomentaria (phaeophyceae). | in order to help explain the absence of the brown kelp lessonia nigrescens from a coastal environment chronically enriched with copper, we characterized the biochemical responses induced by copper stress in this kelp and compared them with those displayed by the copper tolerant brown alga scytosiphon lomentaria. these algae were cultivated with increasing concentrations of copper (20, 40 and 100microgl(-1)) for 96h and the temporal production of hydrogen peroxide, superoxide anions and lipoperox ... | 2009 | 19581008 |
| the cytotoxicity of scytosiphon lomentaria against hl-60 promyelocytic leukemia cells. | this study examined the cytotoxicity of scytosiphon lomentaria, using various cancer cell lines. the ethyl acetate (etoac) fraction of this alga showed the cytotoxicity to leukemia cells, including hl-60. when hl-60 cells were treated with its etoac fraction, several apoptotic characteristics, such as dna fragmentation, chromatin condensation, and an increase of the population of sub-g1 hypodiploid cells, were observed. moreover, the etoac fraction decreased c-myc expression in a dose-dependent ... | 2004 | 15650457 |
| destruction of maternal centrioles during fertilization of the brown alga, scytosiphon lomentaria (scytosiphonales, phaeophyceae). | in brown algal fertilization, a pair of centrioles is derived from the male gamete, irrespective of the sexual reproduction pattern, i.e., isogamy, anisogamy, or oogamy. in this study, the manner in which the maternal centriole structure is destroyed in early zygotes of the isogamous brown alga scytosiphon lomentaria was examined by electron microscopy. at fertilization, the zygote had two pairs of centrioles (flagellar basal bodies) derived from motile male and female gametes, and there was no ... | 2004 | 15362114 |