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7 results for “Flavobacteriaceae”
Figure 5 in Morphogenesis of Ulva mutabilis (Chlorophyta) induced by Maribacter species (Bacteroidetes, Flavobacteriaceae)
Figure 5: Phylogenetic tree of strains of Flavobacteriaceae tested for morphogenetic activities. Maximum Likelihood (ML) phylogenetic inference of 16S rRNA gene sequences of the genus Maribacter and related genera in the family Flavobacteriaceae (phylum Bacteroidetes). Maribacter sp. strain MS6 (bold) and all type strains found to be MS6 substitutes in Ulva morphogenesis bioassays are marked in green. Test type strains which did not elicit the MS6 morphotype are marked in dark-red. For taxonomic robustness, the tree was constructed only with high-quality, ≥ 1300 bp 16S rRNA gene sequences, mostly from type strains. The gene sequence of strain MBIC04683 (349 bp) was added to the tree a posteriori using the ARB parsimony function. Numbers at tree nodes are bootstrap values calculated in ML analysis, and values ≥ 70% are shown. The unrooted tree is drawn to scale, and the scale bar represents the number of nucleotide substitutions per site (Costa et al. 2013, Keller-Costa et al. 2014). Arrows indicate strains which were identified as morphogenesis-inducing bacteria in previous studies (Matsuo et al. 2003, Spoerner et al. 2012).
Figure 4 in Morphogenesis of Ulva mutabilis (Chlorophyta) induced by Maribacter species (Bacteroidetes, Flavobacteriaceae)
Figure 4: Relative morphogenetic activity of the tested Flavobacteriaceae. Algae with normal cell wall formation (i.e. without any protrusions) were counted after 14 days of co-cultivation with following bacterial type strains: Maribacter chUngangensis, Maribacter arcticUs, Maribacter sedimenticola, Maribacter stanieri, Maribacter Ulvicola, Maribacter polysiphoniae, Algibacter lectUs, Ulvibacter litoralis, Polaribacter dokdonensis, PseUdozobellia thermophila, Arenibacter palladensis, MUricaUda zhangzhoUensis and the isolated strains RoseovariUs sp. MS2 (formerly Roseobacter sp. MS2) and Maribacter sp. MS6 (formerly Cytophaga sp. MS6). Error bars represent standard deviation (n = 50–70 individual algae). RoseovariUs sp. MS2 and Maribacter sp. MS6 were used as control strains for comparison.
Figure 1 in Morphogenesis of Ulva mutabilis (Chlorophyta) induced by Maribacter species (Bacteroidetes, Flavobacteriaceae)
Figure 1: Control experiment for complementary activity of morphogenesis-inducing bacteria (reference strains). Axenic Ulva mUtabilis sl G mt(+) germlings (A) were inoculated with either RoseovariUs sp. MS2 (B) or Maribacter sp. MS6 (C) or both bacteria (D). Gametophytes were propagated for gamete production and release under laboratory conditions (Wichard and Oertel 2010). Afterwards axenic gametes were prepared according to Wichard (2015). Purified gametes [mating type (+)] were inoculated with selected bacteria (final concentration OD = 1 × 10 − 6) in 10 ml Ulva culture medium and kept in the dark for 24 h to let gametes settle on culture tissue flask. After 14 days 600 growth at 18°C and 90–120 µmol photons s− 1 m− 2 for 17 h light and 7 h dark, thallus development of 50–70 germlings derived from triplicate experiments was examined with an inverted Leica DMIL LED microscope (Leica, Solms, Germany) equipped with a digital camera (Nikon, Düsseldorf, Germany). The four morphotypes are colour-coded. Black arrows indicate protrusions from the exterior cell wall. Scale bars = 100 µm.
Figure 3 in Morphogenesis of Ulva mutabilis (Chlorophyta) induced by Maribacter species (Bacteroidetes, Flavobacteriaceae)
Figure 3: Bioassay screening for morphogenetic activity among selected Flavobacteriaceae (rows). Two-week old germlings are shown. Selected strains were tested with axenic Ulva gametes alone (left column: A–F) and in combination with RoseovariUs sp. MS2 (middle column: G–L) or with Maribacter sp. MS6 (right column: M–R). Black arrows indicate protrusions from the exterior cell wall. Different colours of frames indicate different morphotypes, as explained in Figure 2 and shown for the control experiments in Figure 1. Scale bars = 100 µm.
Figure 2 in Morphogenesis of Ulva mutabilis (Chlorophyta) induced by Maribacter species (Bacteroidetes, Flavobacteriaceae)
Figure 2: Bioassay screening for morphogenetic activity among selected Maribacter strains (rows). Two-week old germlings are shown. Maribacter strains were tested with axenic Ulva gametes alone (left column: A–F) and in combination with RoseovariUs sp. MS2 (middle column: G–L) or with Maribacter sp. MS6 (right column: M–R). Yellow framing (F) highlights an axenic-like development and morphotype with protrusions from the exterior cell wall (black arrow). Purple framing (L) shows cell divisions and blade formation with malformed cell walls (black arrow) indicating an MS2-like morphotype. Red framing (A–E, M–R) shows longitudinal growth and normal cell wall formation similar to the MS6-like morphotype. If the tested strain harboured an MS6-like bioactivity and was inoculated with RoseovariUs sp. MS2, the complete morphogenesis was observed (green framing, G–K). Scale bars = 100 µm.
Fig. 2 in PareUZebyella sediminis gen. nov., sp. nov., a novel marine bacterium in the family FlaVObaCTeriaCeae, isolated from a tidal flat sediment
Fig. 2. Phylogenomic tree constructed based on up-to-date bacterial 92 core genes of strain S2-4-21T and strain MT2-5-19 with closely related type strains in the family Flavobacteriaceae Cryomorpha ignava QSSC 1-22T was selected as the outgroup. Bar, 0.05 represented the amino acid substitution per position. The node values showed the gene support index (gsi).
Fig. 1 in PareUZebyella sediminis gen. nov., sp. nov., a novel marine bacterium in the family FlaVObaCTeriaCeae, isolated from a tidal flat sediment
Fig. 1. Neighbour-joining phylogenetic tree constructed based on 16S rRNA gene sequences showing the relationships of strain S2- 4-21T and strain MT2-5-19 with closely related type strains in the family Flavobacteriaceae. Bootstrapping was carried out with 1000 replicates. Branch node values below 50% are not shown. Black circle at the node represent the congruent topology compared to maximum-likelihood phylogenetic tree. Cryomorpha ignava ACAM 647T was selected as the outgroup. Bar, 0.02 represented the nucleotide substitution per position.
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