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77 results for “wood formation”
Figure 1 from: Soomro N, Mangi JU, Panhwer M, Jatoi GH, Khuhro SA, Khokhar Q, Khan SA, Mengal AN, Shaikh N (2021) Anatomical characteristics of fossil wood collected from the Manchar Formation (Miocene), Thano Bula Khan, Sindh, Pakistan. Italian Botanist 11: 1-8. https://doi.org/10.3897/italianbotanist.11.60344
Figure 1 A map of Sindh (Pakistan), showing the area of Thano Bula Khan from where the fossil wood was collected B geological map showing the Manchar Formation exposed in the study area.
Figure 4 from: Soomro N, Mangi JU, Panhwer M, Jatoi GH, Khuhro SA, Khokhar Q, Khan SA, Mengal AN, Shaikh N (2021) Anatomical characteristics of fossil wood collected from the Manchar Formation (Miocene), Thano Bula Khan, Sindh, Pakistan. Italian Botanist 11: 1-8. https://doi.org/10.3897/italianbotanist.11.60344
Figure 4 Atalantioxylon thanobolensis sp. nov. Plate 3-09 Radial longitudinal section showing arrangement of fibers (×40). Plate 3-10 Radial longitudinal section showing arrangement of fibers (×40). Plate 3-11 Radial longitudinal section showing vessel end-walls and pits (×200). Plate 3-12 Radial longitudinal section showing pits on wall of vessels (×100).
Figure 2 from: Soomro N, Mangi JU, Panhwer M, Jatoi GH, Khuhro SA, Khokhar Q, Khan SA, Mengal AN, Shaikh N (2021) Anatomical characteristics of fossil wood collected from the Manchar Formation (Miocene), Thano Bula Khan, Sindh, Pakistan. Italian Botanist 11: 1-8. https://doi.org/10.3897/italianbotanist.11.60344
Figure 2 Atalantioxylon thanobolensis sp. nov. Plate 1-01: Macrograph of the fossil wood TB 35. Plate 1-02: Cross section showing general distribution of vessels and parenchyma (×40). Plate 1-03: Cross section showing general distribution of vessels and parenchyma. (×100). Plate 1-04: Cross section showing details of vessels and parenchyma. (×200).
Figure 3 from: Soomro N, Mangi JU, Panhwer M, Jatoi GH, Khuhro SA, Khokhar Q, Khan SA, Mengal AN, Shaikh N (2021) Anatomical characteristics of fossil wood collected from the Manchar Formation (Miocene), Thano Bula Khan, Sindh, Pakistan. Italian Botanist 11: 1-8. https://doi.org/10.3897/italianbotanist.11.60344
Figure 3 Atalantioxylon thanobolensis sp. nov. Plate 2-05 Tangential section showing general distribution of xylem rays and fibers (×40). Plate 2-06 Tangential section showing general distribution of xylem rays and fibers (×100). Plate 2-07 Tangential section showing details of xylem rays (×400). Plate 2-08 Tangential section showing general distribution of xylem rays and fibers (×200).
FIG. 20 in Fossil wood from the lower Miocene of Myanmar (Natma Formation): palaeoenvironmental and biogeographic implications
FIG. 20. — Indet. sp. 1, MNHN.F.50199 (A-F): A, Ts, vessels and few vasicentric parenchyma, solitary secretory canals (arrows) or in short tangential lines, surrounded by parenchyma, remarkably bigger than vessels; B, C, Tls, 1-4-seriate rays with sometimes long uniseriate row of marginal cells (arrow); D, Tls, parenchyma cells (white arrow) and secretory canal (black arrow); E, Tls, detail of secretory canals in short tangential line; F, Rls, heterocellular rays with procumbent cells (black arrow) and square or upright cells (white arrow). G-J, Indet. sp. 2, MNHN.F.50200: G, Ts, poorly preserved wood, vessel arrangement often in groups; H-I, Tls, 1-5-seriate rays, with maybe sheath cells (arrows); J, Rls, heterocellular rays with procumbent and square or upright cells. Scale bars: A, G, 1 mm; B, H, 500 µm; C-F, I-J, 200 µm. Abbreviations: see Fig. 2.
FIG. 2 in Fossil wood from the lower Miocene of Myanmar (Natma Formation): palaeoenvironmental and biogeographic implications
FIG. 2. — Cupressinoxylon sp. MNHN.F.50171: A, transverse section (Ts), growth limits (white arrows), diffuse parenchyma (grey arrows) and zonate parenchyma (black arrows), large black areas are cells filled with deposit material; B, Ts, growth limit with gradual transition from earlywood to latewood; C, tangential longitudinal section (Tls), 1- sometimes 2-seriate rays and parenchyma lines (arrow); D, Tls, detail of 1- sometimes 2-seriate rays; E, Tls, smooth longitudinal parenchyma walls (arrows); F, Tls, 1-2-seriate rays and tangential pits (arrows); G, radial longitudinal section (Rls), possibly cupressoid and/or podocarpoid crossfield pits (arrow); H, Rls, uniseriate radial pits; I, Rls, smooth parenchyma cell walls. Scale bars: A, C, 1 mm; B, 200 µm; E-F, H, 100 µm; G, 50 µm; I, 20 µm.
FIG. 6. — Spitsbergaspis prima n. gen., n in Un nouveau genre de Pteraspidiformes (Vertebrata, Heterostraci) de la Formation de Wood Bay (Dévonien inférieur, Spitsberg)
FIG. 6. — Spitsbergaspis prima n. gen., n. sp., Formation de Wood Bay, Dévonien inférieur, Spitsberg; A, partie de la plaque pinéale avec vue des pores et des canaux (sous alcool) du système sensoriel, partie gauche (MNHN, SVD 754); B, zone postérieure d'un disque dorsal, montrant l'absence complète d'épine dorsale (MNHN, SVD 740). Échelles: A, 2 mm; B, 10 mm.
FIG. 1. — A in Un nouveau genre de Pteraspidiformes (Vertebrata, Heterostraci) de la Formation de Wood Bay (Dévonien inférieur, Spitsberg)
FIG. 1. — A, localisation de l'archipel du Svalbard par rapport à l'Europe; B, carte géologique simplifiée du Spitsberg, localisation de la Formation de Wood Bay dans l'encadré, d'après Goujet (1984); localisation des gisements: 1 (A11), 2 (B IV), 3 (B II). Échelle: B, 100 km.
SND1 Transcription Factor-Directed Quantitative Functional Hierarchical Genetic Regulatory Network in Wood Formation in Populus trichocarpa
GEO Series GSE49911. Populus trichocarpa. 18 samples. Type: Expression profiling by high throughput sequencing.
Transcriptome profiling of Pinus radiata branches reveals new insights into compression wood formation in response to gravity stress
GEO Series GSE47167. Pinus radiata. 12 samples. Type: Expression profiling by array.
Figure 6 in The onset of hazel wood formation in Norway spruce (Picea abies [L.] Karst.) stems
<p>The anatomy of secondary disturbed zones and their growth in the later stages of indentation. (a) Asymmetric formation of a secondary disturbed zone (arrow) after the termination of the primary disturbed zone formation in the third annual growth ring. Cross-section, scale bar = 500 μm. (b) Symmetric formation of a secondary disturbed zone (arrows) in the third annual growth ring. Arrowheads show succeeding indentations within annual growth rings that have been previously indented. Cross-section, scale bar = 500 μm. (c) Early stages of the formation of a secondary disturbed zone in the marginal zones of the fourth annual growth ring. Polyphenolic compounds present in both tracheids and parenchyma cells (arrows) while the leaf trace (lt) growth has not yet been completed. Tangential section, scale bar = 200 μm. (d) Secondary disturbed zone with rays, and intertwined and twisted tracheids (arrows). Outside the zone, tracheids were only slightly undulated (arrowheads). Radial section of the marginal zone in the seventh indented annual growth ring, scale bar = 500 μm. (e) Aggregation of uniseriate and biseriate rays (arrowheads) into the multiseriate parenchyma ray (arrow) in the central region of the seventh indented annual growth ring. Cross-section in the polarised light microscopy, scale bar = 100 μm. (f) Shape and size modifications of the parenchyma ray cells (arrowheads) in the marginal zone on the boundary of the seventh indented annual growth ring. Cross-section in the polarised light microscopy, scale bar = 100 μm. (g) Continuing growth of hazel wood zones in the eighth annual growth ring. Aggregated multiseriate parenchyma rays (arrowheads) occur in both the marginal zones and the central regions of the hazel wood. Large disturbed zones are indicated by arrows. Tangential section in the polarised light microscopy, scale bar = 200 μm. (h) Close-up view of the aggregated parenchyma ray structure (arrows) and disturbed tracheids (arrowheads) in the eleventh annual growth ring. Tangential section, scale bar = 100 μm</p>
Figure 5 in The onset of hazel wood formation in Norway spruce (Picea abies [L.] Karst.) stems
<p>Distribution of polyphenolic compounds within disturbed zones. (a) Polyphenolic compounds present inside the longitudinal tracheids (black arrows), parenchyma rays (arrowheads), and both disturbed tracheids and traumatic parenchyma cells (yellow arrows). Unstained radial section, scale bar = 100 μm. (b) Close-up view of disturbed cell lumens filled with polyphenolic compounds (arrows). Crystals were also present inside the traumatic parenchyma cells (arrowheads). Unstained radial section, scale bar = 50 μm. (c) Polyphenolic compounds inside undisturbed tracheid lumens (black arrow). Yellow arrows show residues of disturbed tracheids. Bright-field microscopy of the cross-section made above a disturbed zone, scale bar = 50 μm. (d) Polyphenolic compounds inside disturbed tracheids (black arrows) located in close proximity to a parenchyma ray. Yellow arrow shows a large disturbed tracheid which disrupts the entirety of a ray. There was a conspicuous hypertrophy and disordering of parenchyma cells in the upper part of a ray (yellow arrowheads). Radial section, scale bar = 100 μm</p>
Figure 3 in The onset of hazel wood formation in Norway spruce (Picea abies [L.] Karst.) stems
<p>Scanning electron microscopy images of fungal infection and anatomical abnormalities in primary disturbed zones. (a, b) Fungal hyphae present in tracheid lumens (arrows) in close proximity to the leaf trace. Radial sections, scale bars = 20 μm. (c) The onset of the tracheid cell wall degradation resulting in the formation of cell wall cracks (arrows). Radial section, scale bar = 10 μm. (d) Abnormally large cross-field pitting (arrows) at the intersections of longitudinal tracheids and ray parenchyma cells. Radial-section, scale bar = 20 μm. (e, f) Leaf trace conductive tissue (arrowhead) which is plugged and filled with polyphenolic compound deposits (arrows). Radial sections. Scale bar for (a) = 20 μm, scale bar for (b) = 10 μm</p>
Figure 2 in The onset of hazel wood formation in Norway spruce (Picea abies [L.] Karst.) stems
<p>The anatomy of indented annual growth ring tissues in the early stages of indentation. (a, b) Radial sections through the centre of the leaf trace showing twisted tracheids in large disturbed zones (arrows) which induce the onset of indentation (white arrowheads) within annual growth ring. Yellow arrowheads show the reorientation of tracheids towards the cambium in a radial direction. The dark red colour is due to the presence of polyphenolic compound deposits inside the leaf trace. Bright-field (a) and polarised light (b) microscopy, scale bars = 500 μm. (c) The effect of the asymmetry of the disturbed zone (arrows), associated with the leaf trace, on the depth of indentation within the annual growth ring (arrowheads). Cross-section, scale bar = 200 μm. (d) The onset of indentation after the termination of the leaf trace formation. Cross-section, scale bar = 500 μm. (e) The early stage of the disturbed zone formation (arrows) associated with the leaf trace growth. Tangential section, scale bar = 100 μm. (f) Intertwined tracheids in the marginal zone of indented annual growth ring. Radial section in polarised light microscopy, scale bar = 100 μm; agr, annual growth ring; lt, leaf trace; p, pith</p>
Figure 1 in The onset of hazel wood formation in Norway spruce (Picea abies [L.] Karst.) stems
<p>Macroscopic characteristics of hazel wood zones. (a) Norway spruce stem disc containing the hazel wood zones, cross-section. The wedge-shaped samples, labelled B1–B3, denote different blocks separated by age for microscopic observations. Cross-section, scale bar = 2 cm. (b) Topographic profile of conical lenticular depressions within the fifth annual growth ring. The dark brown colour is due to the presence of polyphenolic compounds (arrows). Tangential section, scale bar = 1 mm. (c) Various sizes of hazel wood zones coming from the 10<sup>th</sup> annual growth ring. Tangential section, scale bar = 1 cm. (d) The 3-D model of the shape and dimensions of the annual growth ring indentation which shows rapid changes in the early stages of indentation development. Scale bar = 1 cm. (e) In the 3-D model, the empty spaces at the margins of indented annual growth rings (arrows) denote the secondary disturbed zones which spread through several annual growth rings. Scale bar = 0.5 cm</p>
Figure 4 in The onset of hazel wood formation in Norway spruce (Picea abies [L.] Karst.) stems
<p>Distribution of resin ducts per unit area of wood within annual growth rings</p>
circad_pop1-circadian rhythm in the expression of genes involved in the formation of poplar wood
GEO Series GSE16459. Populus tremula x Populus alba; Populus sp.. 10 samples. Type: Expression profiling by array.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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