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86 results for “Nostocales”
FIGURE 5 in Roholtiella, gen. nov. (Nostocales, Cyanobacteria)-a tapering and branching cyanobacteria of the family Nostocaceae
FIGURE 5. Sequence of 16S-23S ITS flanking regions of the BoxB and V3 helices for Roholtiella species. Base pair position shown above sequences, with sequences of BoxB, BoxA-D4, and V3 not shown. Variable bases shaded in gray.
FIGURE 2. A–O in Roholtiella, gen. nov. (Nostocales, Cyanobacteria)-a tapering and branching cyanobacteria of the family Nostocaceae
FIGURE 2. A–O. Roholtiella bashkiriorum, sp. nov. A. Hormogonium. B–E. Young tapered, Calothrix-like filaments. F. Branching at the heterocyte. I, K. Isopolar filaments with intercalary heterocyte(s), arrow marks a point of subsequent breakage. G–H, J, M–N. Mature filaments becoming arthrospores and being released from the opened ends. L, O. Rows of arthrospores. P–X. Roholtiella fluviatilis, sp. nov. P, S. Young tapered filaments. Q–X. Mature filaments and formation of arthrospores. R. Double false branching. U. Row of arthrospores. X. Filaments with reddish colored sheath. Strains used in this figure: CCALA 1057 = B–C, F, I–J, L, O, CCALA 1059 = A, D–E, G–H, K, M–N. CCALA 1058 = P–X. Scale bar applies to all figures, in A, B, D–H, J–P, R, T–X = 20 μm, in C, I, Q, S = 50 μm.
FIGURE 2. A–D in Morphological diversity of benthic Nostocales (Cyanoprokaryota/Cyanobacteria) from the tropical rocky shores of Huatulco region, Oaxaca, México
FIGURE 2. A–D. Brasilonema sp. A. Filaments densely fasciculate. B. False branches. C. Intercalary heterocyte. D. Development of isopolar hormogonia. E–I. Myochrotes sp. E. Geminate and simple false branches. F. Filaments constricted, densely entangled and widening towards ends. G. Hormogonia in a row. H. Closed apex closed prior to hormogonia liberation. I. Isopolar filament with variations in diameter. Arrow pointing at crescent-shape hormogonia, ap = apical cell, nc = necridic cell, ihet =intercalary heterocyte. Scale bars: A = 20 μm, D = 20 μm, B, C, E–I = 6 μm.
FIGURE 1. A. Map showing study area. B in Morphological diversity of benthic Nostocales (Cyanoprokaryota/Cyanobacteria) from the tropical rocky shores of Huatulco region, Oaxaca, México
FIGURE 1. A. Map showing study area. B. Ophiotrix sp. growth at Cacaluta bay. D. Hassallia littoralis growth at El Arrocito bay. E. Petalonema sp. growth at San Agustín bay. F. Kyrtuthrix cf. maculans growth at Panteones beach. G, H. Brasilonema sp. growth at Tangolunda bay. B, C, D. Supratidal environments. E, F, G. Intertidal environments.
FIGURE 4. A–D in Morphological diversity of benthic Nostocales (Cyanoprokaryota/Cyanobacteria) from the tropical rocky shores of Huatulco region, Oaxaca, México
FIGURE 4. A–D. Scytonematopsis cf. crustacea. A. Thallus with false branching. B. Thallus of isopolar attenuated filaments, basal and intercalary heterocytes. C. Isopolar crescent-shaped development of hormogonia. D. Isopolar hormogonia formation. E–H. Kyrtuthrix cf. maculans E. Isopolar and attenuated filaments in parallel series. F. Filaments within a firm sheath. G. Epilithic thallus with intercalary heterocytes. H. Cells pyramid-shaped, arrow pointing at heteropolar hormogonia formation. het = heterocyte, ihet = intercalary heterocyte, bhet = basal heterocyte. Scale bars: A = 30 μm, B–C = 20 μm, D–H = 6 μm.
FIGURE 3. A–D in Morphological diversity of benthic Nostocales (Cyanoprokaryota/Cyanobacteria) from the tropical rocky shores of Huatulco region, Oaxaca, México
FIGURE 3. A–D. Ophiothrix sp. A. Filament with wide "U" shape. B. False branching detail. C. Apex closed and intercalary heterocyte. D. Isopolar hormogonia. E. Heteropolar hormogonia. F. Hormogonia formation by necridic cell. G–L. Petalonema sp. G. Thallus showing erect loops. H, L. Filament folds with loops. I. Isopolar hormogonia formation by heterocytes. J. Closed apex. K. Trichomes constricted at cross walls. nc = necridic cell, bhet = basal heterocyte, ihet = intercalary heterocyte, phet = pro-heterocyte. Scale bars: A = 20 μm, G = 30 μm, B–F, H–L = 6 μm.
FIGURE 5. A–C in Morphological diversity of benthic Nostocales (Cyanoprokaryota/Cyanobacteria) from the tropical rocky shores of Huatulco region, Oaxaca, México
FIGURE 5. A–C. Calothrix sp. A. Entangled filaments. B, C. Curved heteropolar filaments without terminal hair, cells more or less isodiametric. D–H. Hassallia littoralis. D. Heteropolar filaments with basal heterocyte. E. Divaricated false branch with basal heterocyte. F. Closed apex. G. Heteropolar hormogonia. H. Terminal widening of the sheath. bhet = basal heterocyte. Scale bars = 6 μm.
FIGURE 77. A–E in Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales
FIGURE 77. A–E Scytonema subtile; E Colonies periphytic on the culms of the emergent sedge Lepironia articulata. Scale bars = 20 μm
FIGURE 38. A–D in Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales
FIGURE 38. A–D Anabaena cf. oblonga; E Columnar structures of mature benthic mats. Scale bars = 20 μm
FIGURE 26. A–D in Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales
FIGURE 26. A–D Gloeotrichia raciborskii; E Spherical colonies sitting loosely on the sediment in the littoral zone of a tropical river. Scale bars A = 50 μm, B–D = 20 μm
FIGURE 23. A–G in Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales
FIGURE 23. A–G Sphaerospermopsis eucompacta (arrows indicate position of akinetes). Scale bars = 20 μm
FIGURE 3. A–F in Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales
FIGURE 3. A–F Anabaenopsis tanganyikae (ak = akinete); G–H Anabaenopsis circularis. Scale bars = 20 μm
FIGURE 1 in Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales
FIGURE 1. North-eastern Australia, showing the major drainage divisions, and the location of sampling sites.
FIGURE 55. A–F in Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales
FIGURE 55. A–F Wollea bharadwajae; F Gelatinous colony growing on sandy sediments. Scale bars = 20 μm
FIGURE 36. A–B in Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales
FIGURE 36. A–B Anabaena cylindrica; C–D, G–H Anabaena oscillarioides; E–F Anabaena cf. augstumalis. Scale bars = 20 μm
FIGURE 54. A–C in Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales
FIGURE 54. A–C Wollea ambigua; D Colonies of Wollea saccata; Colonies of Nostoc verrucosum. Scale bars = 20 μm
FIGURE 42. A–F in Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales
FIGURE 42. A–F Aulosira cf. epiphytica (ak = akinetes, arrows indicate position of sheath). Scale bars = 20 μm
FIGURE 69. A–C in Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales
FIGURE 69. A–C Colonies of Ewamiania thermalis growing along the crests of minidams just above the thermal waters discharging from the springs.
FIGURE 10 in Descriptions of Brasilonema geniculatum and Calothrix dumus (Nostocales, Cyanobacteria): two new taxa isolated from cemetery tombstones
FIGURE 10. Calothrix dumus sp. nov., morphological variability and developmental stages. (h) hormogonium, (hd) heteropolar development of hormogonium, (htc-b) basal heterocyte, (htc-i) intercalary heterocytes, (mg) microchaetoid growth, (nc) necridic cell, (s) sheath, (sb) scytonematoid branching. Scale bar 10 μm.
FIGURE 9 in Descriptions of Brasilonema geniculatum and Calothrix dumus (Nostocales, Cyanobacteria): two new taxa isolated from cemetery tombstones
FIGURE 9. Brasilonema geniculosis sp. nov., morphological variability and developmental stages. (cs) closed sheath, (os) opened sheath, (ps) purple sheath, (te) tapering end. Scale bars 10 μm.
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