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33 results for “Chara”
FIG. 2. — A, B, Chara kokeilii A in Updated distribution of rare stonewort Chara kokeilii A.Braun (Charophyta) in Southeast Europe with environmental notes
FIG. 2. — A, B, Chara kokeilii A.Braun habitus; C, detail of node with stipulodes, cortified main axis and branchlets in a whorl without cortex cells; D, detail of the branchlet with nucule, globule and bracteoles. Scale bars: A, 1 cm; B, 0.5 cm; C, 5 mm; D, 1 mm.
FIG. 1 in Updated distribution of rare stonewort Chara kokeilii A.Braun (Charophyta) in Southeast Europe with environmental notes
FIG. 1. — Distribution map of Chara kokeilii A.Braun in Southeast Europe with detailed location of Prološko Blato Retention in Croatia (A, B) (Abbreviations: AL, Albania; BG, Bulgaria; GR, Greece; HR, Croatia; ME, Montenegro; MK, North Macedonia). Satellite image of Prološko Blato Retention (C) with the picture of flooded Prološko Blato wetland (D) and sketched vegetation profile of the C. kokeilii finding site at the SE coast of the Retention (E).
Text-fig. 1. Chara braunii from Lake Magadi, Tanzania. a – top of plants with gametangia, b – oospore with 6 ridges, 400 µm long. in Some Finds Of Charophytes From East-Africa (Zambia, Tanzania, Kenya And Somalia)
Text-fig. 1. Chara braunii from Lake Magadi, Tanzania. a – top of plants with gametangia, b – oospore with 6 ridges, 400 µm long.
Assemblies and phylogenetic analyses for the comparative analysis of Chara tomentosa and Chara baltica
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Text-fig. 2. Chara socotrensis. Branchlet segments with mucronate end cells. in Some Finds Of Charophytes From East-Africa (Zambia, Tanzania, Kenya And Somalia)
Text-fig. 2. Chara socotrensis. Branchlet segments with mucronate end cells.
North Temperate Lakes site, station Trout Lake, study of plant biomass of Chara in units of gramsPerSquareMeter on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from North Temperate Lakes (NTL) contains plant biomass of Chara measurements in gramsPerSquareMeter units and were aggregated to a yearly timescale.
Fig. 6. Chara arnhemensis from the isotype specimen R.Specht A21 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 6. Chara arnhemensis from the isotype specimen R.Specht A21 (MEL). (a) Axis and branchlets of whole shoot, scale bar: 10 mm. (b) Section of axis with fertile branchlet whorl, scale bar: 1 mm. (c) Apex of a shoot, scale bar: 1 mm. (d) Transverse section of axis, scale bar: 100 µm. (e) Fertile branchlet with oogonia, antheridia, bracteoles and bract cells, scale bar: 1 mm. (f) Longitudinal view of axis with 2× cortication and long spine cells, scale bar: 1 mm. (g) Whorl of branchlets viewed from above, showing gametangia at the first branchlet nodes, scale bar: 1 mm. (h) Scanning electron micrograph (SEM) of whole oospore with 7 or 8 striae (damaged during preparation), scale bar: 50 µm. (i) SEM of felted, porate fossa wall, scale bar: 2 µm.
Fig. 9. Chara benthamii A.Braun, from the isolectotype specimen I.Wilford 238 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 9. Chara benthamii A.Braun, from the isolectotype specimen I.Wilford 238 (BM). (a) Habit of whole plant, scale bar: 5 cm. (b) Fertile branch apex, scale bar: 10 mm. (c) Branchlet whorl, scale bar: 5 mm. (d) Fertile node with oosporangium, antheridium, bracteoles and bract cells, scale bar: 1 mm. (e) Transverse section of axial cortex, scale bar: 0.5 mm. (f) Oospore with 7–8 striae and a smooth fossa wall, scale bar: 100 µm. (g) Detail of oospore wall, scale bar: 20 µm. (h) Minutely patterned oospore wall construction, scale bar: 2 µm.
Fig. 8. Chara behriana, from R.Breen v053 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 8. Chara behriana, from R.Breen v053 (MEL). (a) Fertile branchlet whorl, scale bar: 5 cm. (b) Base of branchlet whorl and axis of shoot, scale bar: 1 mm. (c) Two fertile branchlet nodes, scale bar: 1 mm. (d) Transverse section of axis cortication, scale bar: 0.5 mm. (e) Base of branchlet whorl with the stipulodes, scale bar: 0.5 mm. (f) Longitudinal view of axis cortication and spine cells, scale bar: 1 mm. (g) Oospore, scale bar: 200 µm. (h) Detail of oospore wall, scale bar: 20 µm. (i) Impression of basal cell on the oospore, scale bar: 100 µm.
Fig. 14. Chara lamprothamniformis, from specimen T.S.Henshall 979 in Charophytes of Australia's Northern Territory - I. Tribe Chareae
Fig. 14. Chara lamprothamniformis, from specimen T.S.Henshall 979 (DNA), (a) female fertile whorl, scale bar: 1 mm. (b) Male fertile whorl, scaleb bar: 1 mm. (c) Longitudinal view of axis, scale bar: 100 μm. (d) Fertile branchlet node with geminate oogonia, bract cells, bracteoles, and bractlet, scale bar: 0.5 mm. (e) Antheridium with smaller bract cells and bracteoles, scale bar: 0.5 mm. (f) Single oosporangium with bract cells, bractoles and bractlet, scale bar: 0.5 mm. (g) Scanning electron micrograph (SEM) of oospore, scale bar: 100 µm. (h) SEM of detail of oospore wall, scale bar: 20 µm. (i) SEM of detail of the impression of the basal cell on the oospore wall, scale bar: 50 µm.
FIGURES 9–15. Chara foliolosa. 9. Habit. 10 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 9–15. Chara foliolosa. 9. Habit. 10. Monoecious plant with oogonium (red arrow) and antheridium (blue arrow) at the same branchlet. 11. Ecorticated basal segment of a branchlet. 12. Apical segment with one ecorticated cell and bract-cells around. 13. Granular aspect of the oospore wall under light microscope. 14. Overview of the oospore SEM. 15. Granular aspect of the oospore wall under SEM.
FIGURES 5–8. Chara braunii 5. Habit. 6 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 5–8. Chara braunii 5. Habit. 6. Gametangia conjoined. Oogonium (red arrow) and antheridium (blue arrow). 7. Thallus and branchlets ecorticated. The black arrow indicates stipulodes in one tier. 8. Apical segment of branchlet and two bract-cells around.
FIGURE 1 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURE 1. Map of Brazil with the location of sampling points. The area highlighted in gray corresponds to the study area.
FIGURE 3 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURE 3. ML 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. Sequences in bold are the new sequences generated. The clades formed are: 1—C. braunii, 2—C. rusbyana, 3—C. haitensis, 4—C. guairensis, 5—C. foliolosa, 6—C. hydropitys.
FIGURE 2 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURE 2. ML Phylogenetic tree based on rbcL 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. Sequences in bold are the new sequences generated. The clades formed are: 2—C. rusbyana, 3—C. haitensis, 4—C. guairensis, 5—C. foliolosa, 6—C. hydropitys.
FIGURE 4 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURE 4. ML Phylogenetic tree based on matK 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. Sequences in bold are the new sequences generated. The clades formed are: 1—C. braunii, 2—C. rusbyana, 3—C. haitensis, 4—C. guairensis, 5—C. foliolosa, 6—C. hydropitys.
FIGURES 16–22. Chara guairensis. 16. Habit. 17 in Taxonomy and phylogeny of Chara (Charophyceae, Characeae) from Brazil with emphasis on the midwest and southeast regions
FIGURES 16–22. Chara guairensis. 16. Habit. 17. Monoecious plant with sejoined gametangia, with oogonium (red arrow) and antheridium (blue arrow) at the same branchlet. 18. Two ecorticated apical segments. 19. Basal segment of a branchlet and a oogonia. 20. Granular aspect of the osospore wall under light microscope. 21. Overview of the oospore under scanning electron microscopy (SEM). 22. Granular aspect of the oospore wall under SEM.
FIGURES 4–10 in Chara kirghisorum (Charales): lectotypification, first reliable record in Europe and update of species distribution in Russia
FIGURES 4–10. Chara kirghisorum. Specimens from Republic of Bashkortostan, Eastern Europe (NS). 3. General view. 4, 5. Whorls of branchlets, stipulodes and stem cortex. 6, 7. Branchlets of male plants with antheridia (arrowheads). 8. Stem cortex with solitary and geminate spine cells (arrowhead). 9. Nodal bulbil. Scale bars: Fig 4 = 5 mm, Figs 5-8, 10 = 0.4 mm, Fig 9 = 0.2 mm. Photo by R.E. Romanov.
Figure 5 from: Urbaniak J, Kwiatkowski P (2019) Taxonomic studies on the Chara section Hartmania in Poland based on morphological and molecular data. PhytoKeys 135: 71-90. https://doi.org/10.3897/phytokeys.135.36714
Figure 5 C. polyacantha with extremely long spine cells (SP) and stipulodes (ST) exceeding axis diameter.
Figure 11 from: Urbaniak J, Kwiatkowski P (2019) Taxonomic studies on the Chara section Hartmania in Poland based on morphological and molecular data. PhytoKeys 135: 71-90. https://doi.org/10.3897/phytokeys.135.36714
Figure 11 Phylogenetic tree inferred from maximum-likelihood (ML) analysis of psaB gene sequence data for the Charophyceae (Characeae) and outgroup taxa, with LM bootstrap support (BP)/bayesian interference (BI) indicated at the nodes.
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