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29 results for “Nitella”
Figures 186–188. Encarsia nitella n in The Australian species of Encarsia Förster (Hymenoptera, Chalcidoidea: Aphelinidae), parasitoids of whiteflies (Hemiptera, Sternorrhyncha, Aleyrodidae) and armoured scale insects (Hemiptera, Coccoidea: Diaspididae)
Figures 186–188. Encarsia nitella n. sp., female. (186) Mesosoma and gaster. (187) Antenna. (188) Fore wing.
FIG. 4 in Nitella sonderi A.Braun (Charales, Charophyceae) - a new record for South America, and first record from outside Australia
FIG. 4. — ML phylogenetic tree inferred in PAUP with GTR + I + G nucleotide substitution model from 66 rbcL sequences of Nitella C.Agardh. Support (ML/BI, BP ≥ 50% and PP ≥ 0.95) are given above/below the branches. Branches with 100% BP, 1.00 PP and sequences obtained for this study are shown in boldface. The branch leading to the outgroup was reduced by three quarters in length. Clade designation is according to Sakayama (2008).
FIG. 5 in Nitella sonderi A.Braun (Charales, Charophyceae) - a new record for South America, and first record from outside Australia
FIG. 5. – ML phylogenetic tree inferred in PAUP with GTR + I + G nucleotide substitution model from 56 ITS sequences of Nitella C.Agardh. Support (ML/BI, BP ≥ 50% and PP ≥ 0.95) are given above/below the branches. Branches with 100% BP, 1.00 PP and sequences obtained for this study are shown in boldface. The branch leading to the outgroup was reduced by 50% in length. Clade designation is according to Sakayama (2008).
FIG. 2 in Nitella sonderi A.Braun (Charales, Charophyceae) - a new record for South America, and first record from outside Australia
FIG. 2. – Male plants of Nitella sonderi A.Braun from Argentina (LE): A, whorl of sterile branchlets; B, sterile branchlet; C, apex with whorls of fertile branchlets forming lax head; D, lax apical head consisting of fertile branchlets, embedded in mucilage 3-furcate "prolification" looking as a fertile branchlet without a central secondary ray from the lateral tertiary ray at the furcation of the central secondary ray (double arrowhead); E, last furcations of fertile branchlets with long straight dactyls; F, fertile branchlet with antheridia obviously unequal each other; G, mucilage cover of fertile branchlet (double arrowhead), mucilage cover of branchlet primary ray; H, antheridia at last furcations of branchlet surrounded with short dactyls, arcuate at their basal parts. Note: A-C, arrowheads represent central secondary ray; D, F, G, arrowheads represent surface of mucilage cover. Photos taken by R. Vidal-Russell. Scale bars: A, E, F, 2 mm; B-D, 5 mm; G, H, 1 mm.
FIG. 3 in Nitella sonderi A.Braun (Charales, Charophyceae) - a new record for South America, and first record from outside Australia
FIG. 3. – Male plants of Nitella sonderi A.Braun from Argentina (LE): A, B, cells extending from the node at the base of the lowest branchlet cell at different focus (arrowheads at A); C-E, shortly narrowing ends of bicellulate dactyls with discoloured tiny confluent end cells having thickened cell walls at the tip; F, end of dactyl after loss of end cell; G, H, triangular shields of antheridia. All photos taken by R. E. Romanov, but H by R. Vidal-Russell. Scale bars: 100 μm.
FIG. 1 in Nitella sonderi A.Braun (Charales, Charophyceae) - a new record for South America, and first record from outside Australia
FIG. 1. – Apical parts of Nitella sonderi A.Braun from Argentina with sterile and fertile whorls (LE). Note: arrowhead, sterile whorls; double arrowhead, fertile whorls of male plants. Photo taken by R. E. Romanov. Scale bar: 1 cm.
Text-fig. 10. Nitella knightiae. Antheridium. in Some Finds Of Charophytes From East-Africa (Zambia, Tanzania, Kenya And Somalia)
Text-fig. 10. Nitella knightiae. Antheridium.
Fig. 14. Nitella silicea from isotype specimen M.T.Casanova & J.Schult r741 in Charophytes of Australia's Northern Territory - II. Tribe Nitelleae
Fig. 14. Nitella silicea from isotype specimen M.T.Casanova & J.Schult r741 (MEL). (a) Habit of whole plant, scale 10 mm. (b) Sterile whorl, scale: 1 mm. (c) Female fertile banchlet, scale: 1 mm. (d) Fertile dactyls, scale: 1 mm. (e) Oogonium, scale: 100 µm. (f) Scanning electron microscope (SEM) image of oospore, scale: 100 µm. (g) SEM image of detail of oospore wall, scale: 20 µm.
Fig. 6. Nitella crocodylus from isotype specimen Casanova r760 in Charophytes of Australia's Northern Territory - II. Tribe Nitelleae
Fig. 6. Nitella crocodylus from isotype specimen Casanova r760 (MEL). (a) Habit of oosporangial plant, scale: 10 mm. (b) Sterile branchlet tip and dactyls, scale: 1 mm. (c) Habit of male plant, scale: 10 mm. (d) Female fertile branchlet whorl, scale: 1 mm. (e) Male branchlet whorl, scale: 5 mm. (f) Fertile female branchlet tip, scale: 1 mm (g) Scanning electron microscope (SEM) image of detail of the oospore ornamentation, a raised reticulum on a sinuously porate ground, scale: 2 µm. (h) SEM image of oospore in side view, scale: 100 µm. (i) Detail of oospore wall, scale: 20 µm. (j) View of the basal-cell impressions, scale: 50 µm.
Fig. 9. Nitella martinii from holotype specimen M.T.Casanova r785 in Charophytes of Australia's Northern Territory - II. Tribe Nitelleae
Fig. 9. Nitella martinii from holotype specimen M.T.Casanova r785 (DNA). (a) Habit of whole plant, scale: 10 cm. (b) Sterile branchlet whorl, scale: 10 mm. (c) Fertile female branchlet axis, scale: 10 mm. (d) Male fertile branchlet, scale: 1 mm. (e) Oogonia at branchlet tips, scale: 250 µm. (f) Branchlet tips, scale: 500 µm. (g) Scanning Electron Microscope (SEM) image of oospore in side view, scale: 100 µm. (h) SEM image of detail of oospore wall, scale: 20 µm. (i) SEM image of view of basal-cell impressions, scale: 100 µm.
Fig. 2. Nitella belangeri from the specimen M.T.Casanova r737 in Charophytes of Australia's Northern Territory - II. Tribe Nitelleae
Fig. 2. Nitella belangeri from the specimen M.T.Casanova r737 (MEL). (a) Habit of whole plant, scale: 5 cm. (b) Sterile branchlet whorl, scale: 5 mm. (c) Fertile branchlet whorl, scale: 1 mm. (d) Three fertile branchlets, scale: 1 mm. (e) Dactyls and gametangia, scale: 0.5 mm. (f) Oogonium, scale: 100 µm. (g) Scanning electron microscope (SEM) image of oospore, scale: 100 µm. (h) SEM image of detail of oospore wall, scale: 10 µm. (i) SEM image of view of basal-cell impressions, scale: 50 µm.
Fig. 4. Nitella boreali-australis from specimen P.Dostine 12 in Charophytes of Australia's Northern Territory - II. Tribe Nitelleae
Fig. 4. Nitella boreali-australis from specimen P.Dostine 12DW23-2 (DNA). (a) Habit of whole plant, scale: 10 mm. (b) Sterile whorl, scale: 5 mm. (c) Fertile branchlet, scale: 1 mm. (d) Dactyls, scale: 100 µm. (e) Scanning electron microscope (SEM) image of oospore, scale: 100 µm. (f) SEM image of detail of oospore wall, scale: 20 µm.
Fig. 8. Nitella limosa from holotype specimen M.T.Casanova & J.Schult r738 in Charophytes of Australia's Northern Territory - II. Tribe Nitelleae
Fig. 8. Nitella limosa from holotype specimen M.T.Casanova & J.Schult r738 (DNA). (a) Habit of whole plant, scale: 1 cm. (b) Sterile whorl, scale: 10 mm. (c) Female fertile branchlet, scale: 500 µm. (d) Scanning Electron Microscope (SEM) image of oospore, scale: 200 µm. (e) SEM image of detail of oospore wall, scale: 20 µm. (f) SEM image of impression of end-cells on oospore wall, scale: 100 µm.
Fig. 16. Nitella tumulosa from specimen J.Schult t840 in Charophytes of Australia's Northern Territory - II. Tribe Nitelleae
Fig. 16. Nitella tumulosa from specimen J.Schult t840 (MEL). (a) Habit of whole plant, scale: 5 mm. (b) Apical whorls, scale: 1 mm. (c) Oogonium, scale: 100 µm. (d) Fertile whorl, scale: 1 mm. (e) Dactyls, scale: 0.2 mm. (f) Placement of gametangia, scale: 1 mm. (g) Light micrograph (LM) of oospore, scale: 100 µm. (h) LM of detail of oospore wall, scale: 20 µm. (i) Scanning electron microscope (SEM) image of oospore, scale: 100 µm. (j) SEM image of detail of oospore wall, scale: 20 µm.
Fig. 1. Nitella acanthospora from the holotype specimen P.K.Latz 17988 in Charophytes of Australia's Northern Territory - II. Tribe Nitelleae
Fig. 1. Nitella acanthospora from the holotype specimen P.K.Latz 17988 (DNA). (a) Habit of whole plant, scale: 10 mm. (b) Fertile whorl, scale: 1 mm. (c) Oosporangium, scale: 500 µm. (d) Sterile branchlet, scale: 1 mm. (e) Dactyls, scale: 0.1 mm, (f) Light micrograph (LM) of oospore wall showing dentate ornamentation in rows perpendicular to the striae, scale: 5 µm. (g) LM of oospore wall showing detail of dentate ornamentation, scale: 5 µm. (h) LM of oospore wall showing density of dentate ornamentation, scale: 5 µm. (i) Scanning electron microscope (SEM) image of oospore wall, scale: 2 µm. (j) SEM image of dentate ornamentation, scale: 1 µm. (k) SEM image of whole oospore in side view, scale: 50 µm.
FIGURES 23–28. Nitella flagellifera. 23 in Taxonomy and phylogeny of Nitella (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 23–28. Nitella flagellifera. 23. Primary node of a branchlet. The red arrow indicates a central secondary ray. 24. Fertile branchlet with gametangia at second (black arrow) and third (red arrow) nodes. 25. Dactyls 2-celled, elongated. Penultimate cell rounded at distal end. End cell conical and mucronate. 26. Oospore membrane with reticulate aspect under LM. 27. Overview of an oospore under SEM. 28. Oospore membrane with beaded imperfect reticulate to reticulate aspect under SEM.
FIGURES 17–22. Nitella elegans. 17. Upper whorls small and somewhat compacted. 18 in Taxonomy and phylogeny of Nitella (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 17–22. Nitella elegans. 17. Upper whorls small and somewhat compacted. 18. Primary node of a branchlet. The red arrow indicates a central secondary ray. 19. Dactyls 2-celled. Penultimate cell cylindrical tapering distally towards the base of end cell. End cell conical, acuminate to mucronate. 20. Oospore membrane with granulate aspect under LM. 21. Overview of an oospore under SEM. 22. Oospore membrane with finely granulate aspect under SEM.
FIGURES 5–10. Nitella acuminata. 5 in Taxonomy and phylogeny of Nitella (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 5–10. Nitella acuminata. 5. Upper whorls with loosely compacted heads (a diagnostic feature of N. subglomerata). 6. Compacted heads (a diagnostic feature of N. gollmeriana). 7. Dactyls 1-celled, abbreviated with acuminate apex (a diagnostic feature of N. gollmeriana). 8. Oospore membrane with finely granulate aspect under LM. 9. Overview of an oospore under SEM. 10. Oospore membrane with scabrous aspect under SEM.
FIGURES 11–16. Nitella axillaris. 11. Whorl with a in Taxonomy and phylogeny of Nitella (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 11–16. Nitella axillaris. 11. Whorl with a small, axillary, sessile, compacted head, at a node of the thallus. 12. Whorl with a long, axillary, stipitate and compacted head. 13. 2-furcated fertile branchlet of a head. The black and red arrows indicate, respectively, the primary and the secondary nodes. 14. Dactyls 2-celled, abbreviated, forming a crown. Penultimate cell tapering gradually towards the base of end cell. End cell conical, acute or acuminate. 15. Oospore membrane with reticulate aspect under LM. 16. Oospore membrane with beaded imperfect reticulate aspect under SEM.
FIGURE 4 in Taxonomy and phylogeny of Nitella (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURE 4. Bayesian Phylogenetic tree based on ITS2 sequences. The numbers associated with the nodes indicate the bootstrap values (BS) for maximum likelihood and posterior probability (PP) for Bayesian analysis; nodes without values indicate BS <70% and PP <0.70; nodes with * indicate BS> 95% and PP>0.95 Sequences in bold are the new sequences generated in this study. Samples marked with "1" can be morphologically identified as N. acuminata (Wood & Imahori 1965); "2" with N. subglomerata (Wood & Imahori 1965).
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