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8 results for “Timaviella”
FIGURE 5 in Timaviella dunensis sp. nov. from sand dunes of the Baltic Sea, Germany, and emendation of Timaviella edaphica (Elenkin) O.M. Vynogr. & Mikhailyuk (Synechococcales, Cyanobacteria) based on an integrative approach
FIGURE 5. Timaviella dunensis (Us-6-3): A—overview of colony on the surface of agarized medium: thallus prostrate and in growing inside the medium; B, K—filaments in firm hyaline sheath; C—trichome without sheath; D—fragment of trichome with necridia; note elongated, discoid and obliquely dividing cells; E, G—loosely arranged filaments with geminate false branching; F—consecutive single and geminate false branching; H, I—fragments of filaments with trichomes twisted in the sheath; J—formation of hormogonia, cells with granulations. Scale bars: A—50 μm, B–K—10 μm.
FIGURE 2 in Timaviella dunensis sp. nov. from sand dunes of the Baltic Sea, Germany, and emendation of Timaviella edaphica (Elenkin) O.M. Vynogr. & Mikhailyuk (Synechococcales, Cyanobacteria) based on an integrative approach
FIGURE 2. Molecular phylogeny of Timaviella based on the 16S rRNA gene concatenated with the 16S-23S ITS sequence comparisons. A phylogenetic tree was inferred by the Maximum Likelihood method with Maximum Likelihood bootstrap support (BP) and Bayesian Posterior Probabilities (PP). From left to right, support values correspond to Maximum Likelihood BP and Bayesian PP; BP values lower than 50% and PP lower than 0.8 not shown. Strain in bold represents newly sequenced cyanobacteria. Authentic strains marked with asterisk.
FIGURE 3 in Timaviella dunensis sp. nov. from sand dunes of the Baltic Sea, Germany, and emendation of Timaviella edaphica (Elenkin) O.M. Vynogr. & Mikhailyuk (Synechococcales, Cyanobacteria) based on an integrative approach
FIGURE 3. Secondary structure of the main informative helices of region 16S-23S ITS of cultured strains of Timaviella. All differences between strains of T. edaphica (KZ-7-1) and T. dunensis (Us-6-3) are presented in comparison with the authentic strain of T. circinata (GR4). Variable bases are shown with arrows, places of insertions/deletions of base pairs are marked with arrowheads, homological base pairs among different strains are indicated with gray lines. Intraspecific variation inside T. edaphica are shown with the asterisk.
FIGURE 1 in Timaviella dunensis sp. nov. from sand dunes of the Baltic Sea, Germany, and emendation of Timaviella edaphica (Elenkin) O.M. Vynogr. & Mikhailyuk (Synechococcales, Cyanobacteria) based on an integrative approach
FIGURE 1. Molecular phylogeny of Oculatellaceae (Synechococcales) based on 16S rRNA sequence comparisons. A phylogenetic tree was inferred by the Maximum Likelihood method with Maximum Likelihood bootstrap support (BP) and Bayesian Posterior Probabilities (PP). From left to right, support values correspond to Maximum Likelihood BP and Bayesian PP; BP values lower than 50% and PP lower than 0.8 not shown. Strain in bold represents newly sequenced cyanobacteria. Authentic strains marked with asterisk.
FIGURE 6 in Timaviella dunensis sp. nov. from sand dunes of the Baltic Sea, Germany, and emendation of Timaviella edaphica (Elenkin) O.M. Vynogr. & Mikhailyuk (Synechococcales, Cyanobacteria) based on an integrative approach
FIGURE 6. Ultrastructure of original strains of Timaviella with characteristic position of thylakoids arranged more or less parallel in a parietal position. T. edaphica (KZ 7-1-2): fragments of trichomes without sheath (A), in multilayered sheath (B), constricted at cross walls, with cyanophycin granules; cells barrel-shaped, isodiametric (A) to elongated (G), end cells (D), trichomes in longitudinal section (E). T. edaphica (KZ 23-2): end cells (C), trichomes in longitudinal section (F). Timaviella dunensis (Us-6-3): fragments of trichomes in thick sheath (H, I), weakly constricted at cross walls; cells cylindrical, elongated, end cells (J–L); formation of necridia (M). S, sheath, Cy, cyanophycin granules, T, thylakoids. Scale bars = 1µm.
FIGURE 4 in Timaviella dunensis sp. nov. from sand dunes of the Baltic Sea, Germany, and emendation of Timaviella edaphica (Elenkin) O.M. Vynogr. & Mikhailyuk (Synechococcales, Cyanobacteria) based on an integrative approach
FIGURE 4. Timaviella edaphica: A, B—overview of colonies on the surface of agarized medium (A—thallus with wooly surface (freshly isolated strain), B—thallus prostrate and in growing inside the medium); C—loosy aggregated filaments; F, H—filaments with single and geminate pseudobranches; D—bundle of filaments; E—trichomes slightly constricted and granulated at the cross walls; G—trichomes with obliquely dividing cells; I—trichomes with necridia; J—hormogonia. KZ-7-1-2: A–C, D–E, J, Golos-9-1: F, G, KZ-23-2: H, I. Scale bars: A, B—50 μm, C–J—10 μm.
FIGURE 18. Timaviella radians. A–B in Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species
FIGURE 18. Timaviella radians. A–B. Rapid cell division at apical region commonly observed, forming a "basal" part to filament. C. Radial formation of colonies based on trichomes radiating from an attachment point. D. False-branches in singles or in pairs, consecutive, sometimes geminate branching, E. Compact rope-like coils. F. Rapid cell division causing twists and turn of trichome within sheath. Mature filaments isodiametric, trichomes constricted at distinct cross-walls, with one large central granule dominates cytoplasm. Scale bar 10μm in 400X (C) and 1000X magnification (A–B, D–F).
FIGURE 17. Timaviella obliquedivisa. A–B. Slightly tapering filaments. C–E in Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species
FIGURE 17. Timaviella obliquedivisa. A–B. Slightly tapering filaments. C–E. Consecutive double and single false-branches in filaments resulting in branch-like structures. F–G. Cell division in oblique angles, causing geminate, knot-like branching or resembling to truebranching. H. Compact coiling of trichomes within sheath. Scale bar 10μm in 1000X magnification.
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