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37 results for “Laurencia”
FIGURES 1–4 in Chondrophycus anabeliae (Rhodomelaceae, Ceramiales), a new species in the Laurencia complex from the Mexican Caribbean
FIGURES 1–4. Chondrophycus anabeliae sp.nov. (Holotype, UAMIZ 1240). Fig. 1. Habit (5 mm). Fig. 2. Female plant (1 mm). Fig. 3. Male plant (1 mm). Fig. 4. Tetrasporangial plant (1 mm).
FIGURE 8 in Morphological and molecular systematic investigation of Laurencia karachiana sp. nov. (Ceramiales, Rhodophyta) from Karachi, Pakistan
FIGURE 8. Holotype of Laurencia platyclada (NY00900238). The image belongs to The C.V. Starr Virtual Herbarium (http://sweetgum. nybg.org/science/vh/)
FIGURE 6 in Morphological and molecular systematic investigation of Laurencia karachiana sp. nov. (Ceramiales, Rhodophyta) from Karachi, Pakistan
FIGURE 6. Laurencia karachiana Bibi, Cassano & Rasheed sp. nov. (A) Female branches. (B) Detail of the branchlets showing cystocarps disposed subapically. (C) Longitudinal section through female branchlet with prominent cystocarp without protuberant ostiole. (D) Procarp-bearing segment with five pericentral cells, the fifth becoming the supporting cell (SU) of carpogonial branch; central cell of procarp-bearing segment (c), lateral sterile group (ls). (E) Development of young procarp; basal cell of trichoblast (bt) which supports the procarp; central cell of procarp-bearing segment (c) with five pericentral cells. (F) Procarp before fertilization with four-celled carpogonial branch (cb), carpogonium (cg), trichogyne (tr, unfocused), supporting cell (SU), lateral sterile group (ls), basal sterile group (bs). Scale bar: A, 2 mm; B, 1 mm; C, 200 μm; D-F, 10 mm.
FIGURE 7 in Morphological and molecular systematic investigation of Laurencia karachiana sp. nov. (Ceramiales, Rhodophyta) from Karachi, Pakistan
FIGURE 7. Laurencia karachiana Bibi, Cassano & Rasheed sp. nov. (A) Tetrasporangial branches. (B) Detail of tetrasporangial branchlets. (C) Transverse section of tetrasporangial axial segment showing axial cell (a) and two fertile pericentral cells, the third and fourth (arrows); the other two pericentral cells remain vegetative (p). (D) Detail of fertile pericentral cell (fp) with two pre-sporangial cover cells (pr), tetrasporangium (te); post-sporangial cover cell (po). (E) Longitudinal section through apical portion of tetrasporangial branchlet showing origin of tetrasporangia (te) from axial cell (arrow), fertile pericentral cells (fp) and pre-sporangial cover cells (pr). (F) Longitudinal section through a tetrasporangial branchlet showing parallel arrangement of tetrasporangia. Scale bar: A, 2 mm; B, 1 mm; C-E, 25 μm; F, 100 μm.
FIGURE 4 in Morphological and molecular systematic investigation of Laurencia karachiana sp. nov. (Ceramiales, Rhodophyta) from Karachi, Pakistan
FIGURE 4. Laurencia karachiana Bibi, Cassano & Rasheed sp. nov. (A) Habit of male gametophyte (Holotype KUH-SW-1312). (B) Habit of female gametophyte (Isotype SPF58339). (C) Habit of tetrasporophyte (Isotype SPF58339). (D) Detail of basal portion of the thallus showing discoid holdfast. (E) Cortical cells in surface view showing corps en cerise (one per cell) in living material. (F) Cortical cells in surface view showing secondary pit-connections (arrow). (F) Transverse section of thallus. Scale bar: A, 1 cm; B and C, 2 cm; D, 2 mm; E-F, 50 μm; G, 100 μm.
FIGURE 5 in Morphological and molecular systematic investigation of Laurencia karachiana sp. nov. (Ceramiales, Rhodophyta) from Karachi, Pakistan
FIGURE 5. Laurencia karachiana Bibi, Cassano & Rasheed sp. nov. (A) Transverse section of upper portion of branch showing an axial cell (arrow) with four pericentral cells (p). (B) Detail of medullary cell with lenticular thickening (arrow). (C) Male branches. (D) Detail of compound-cymose male branches. (E) Longitudinal section through a male branchlet showing spermatangial branches in cup-shaped tips. (F) Detail of of trichoblast-type spermatangial branches with two laterals, sterile (arrow) and spermatangial branches. (G) Detail of spermatangial branches with terminal vesicular sterile cells (arrow) and spermatangia with an apical nucleus. Scale bar: A and B, F and G, 25 μm; C, 2 mm; D, 1 mm; E, 100 μm.
FIGURE 3 in Morphological and molecular systematic investigation of Laurencia karachiana sp. nov. (Ceramiales, Rhodophyta) from Karachi, Pakistan
FIGURE 3. Neighbor-joining (NJ) analysis for COI-5P sequences. Bootstrap values for NJ (2000 replicates) are shown at nodes, values under 70 were not considered. Sequence generated in this study in bold.
FIGURE 2 in Morphological and molecular systematic investigation of Laurencia karachiana sp. nov. (Ceramiales, Rhodophyta) from Karachi, Pakistan
FIGURE 2. Consensus tree derived from Maximum likelihood (ML) analyses of rbcL sequences. Bootstrap supports for NJ (2000 replicates)/ML (1000 replicates)/PP <0.95 are given at the nodes. Sequence generated in this study in bold; – indicates lack of bootstrap support or values under 70; *indicates full support.
FIGURE 1 in Morphological and molecular systematic investigation of Laurencia karachiana sp. nov. (Ceramiales, Rhodophyta) from Karachi, Pakistan
FIGURE 1. Map of Karachi coast showing sampling sites. Site 1. French Beach (Station/Ledge 1), Site 2. French Beach (Station/Ledge 2), Site 3. Hawke's Bay.
FIGURE. 10 in Spread of the introduced species Laurencia caduciramulosa (Rhodomelaceae, Rhodophyta) to the northwest Atlantic: A morphological and molecular analysis
FIGURE. 10. Phylogenetic relationships in the Laurencia complex based on Bayesian analysis of rbcL DNA sequences. MP bootstrap, ML bootstrap, and Bayesian posterior probability values are indicated at the nodes. Bold lines indicate a fully supported node. Taxa marked in bold indicate newly determined sequences.
FIGURES 3–9. Laurencia caduciramulosa. Fig. 3 in Spread of the introduced species Laurencia caduciramulosa (Rhodomelaceae, Rhodophyta) to the northwest Atlantic: A morphological and molecular analysis
FIGURES 3–9. Laurencia caduciramulosa. Fig. 3. Habit of a plant showing crown of small deciduous branchlets near apices. Note a single discoid holdfast (arrow) (200 µm). Fig. 4. Basal portion of a plant showing secondary discoid holdfast (arrow) (500 µm). Fig. 5. Upper portions of a branch with small branchlets and scars of released branchlets (arrowheads). Note lenticular thickenings throughout the branch (arrows) (100 µm). Fig. 6. Cortical cells in surface view showing one single corp en cerise per cell in living material (25 µm). Fig. 7. Cortical cells in surface view of the mid-portion of a branch showing secondary pit connections (arrow) (25 µm). Fig. 8. Transverse section of a branch showing lenticular thickenings in the wall of medullary cells (50 µm). Fig. 9. Transverse section of the upper portion of a branch showing an axial cell (a) with four pericentral cells (p). Note lenticular thickenings in detail (25 µm).
FIGURE 2 in Spread of the introduced species Laurencia caduciramulosa (Rhodomelaceae, Rhodophyta) to the northwest Atlantic: A morphological and molecular analysis
FIGURE 2. World distribution map of Laurencia caduciramulosa. Sites: 1. Ɨ Vietnam, type locality (Masuda et al. 1997) 2. Malaysia (Masuda et al. 2001). 3. Italy (Furnari et al. 2001). 4. Anambas Islands, Indonesia (Liao et al. 2004). 5. France (Klein & Verlaque 2005). 6. Greece (Tsirika & Haritonidis 2005). 7. Brazil (Cassano et al. 2006). 8. Canary Islands, Spain (Cassano et al. 2008a). 9. Cuba (Sentíes et al. 2010). 10. Brazil (Torrano-Silva & Oliveira 2013). 11. Florida, USA (this study).
Fig. 4 in Condensation derivatives of 4-isopropylbenzaldehyde with acetophenone from the red alga Laurencia tristicha
Fig. 4. Absolute configurations determination of compounds 2a/2b, 3a/3b, and 4a/4b by comparison of the experimental ECD curves (measured at about 1 mg/mL in methanol) with calculated curves.
Fig. 3 in Condensation derivatives of 4-isopropylbenzaldehyde with acetophenone from the red alga Laurencia tristicha
Fig. 3. Key NOESY correlations of compounds 3 and 4.
Fig. 5 in Condensation derivatives of 4-isopropylbenzaldehyde with acetophenone from the red alga Laurencia tristicha
Fig. 5. Plausible biosynthetic pathway of compounds 1–5.
Fig. 2 in Condensation derivatives of 4-isopropylbenzaldehyde with acetophenone from the red alga Laurencia tristicha
Fig. 2. Key COSY and HMBC correlations of compounds 1–4.
Fig. 1 in Condensation derivatives of 4-isopropylbenzaldehyde with acetophenone from the red alga Laurencia tristicha
Fig. 1. Structures of compounds 1–6.
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