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23 results for “microspores”
Text-fig. 1. Lycospora. a: Microspore from the bisporangiate cone Flemingites gracilis CARRUTH. (from Brack-Hanes and Thomas 1983). This type of microspore should be referred to Microspinosporites BEK. b: Flanged microspore from the microsporangiate cone Lepidostrobus binneyanus A.ARBER (from Thomas 1970), same magnification as in (a). c, d: Microscpores from the microsporangiate cone Lepidostrobus brownii (UNGER) SCHIMP. (from Thomas and Bek 2014). in Why Lycospora Dominated Many Pennsylvanian Spore Assemblages
Text-fig. 1. Lycospora. a: Microspore from the bisporangiate cone Flemingites gracilis CARRUTH. (from Brack-Hanes and Thomas 1983). This type of microspore should be referred to Microspinosporites BEK. b: Flanged microspore from the microsporangiate cone Lepidostrobus binneyanus A.ARBER (from Thomas 1970), same magnification as in (a). c, d: Microscpores from the microsporangiate cone Lepidostrobus brownii (UNGER) SCHIMP. (from Thomas and Bek 2014).
Text-fig. 5. Micro- and megaspores of quillwort (Isoëtes). Microspores: 1 – Isoëtes lacustris, WS 33, 2 – 3 Isoëtes, SJ 54, 4 – Isoëtes, SJ 56, 5 – Isoëtes, SJ 75. Megaspores: 6 – 8 Isoëtes, SJ 70. Localities WS Wielki Staw, SJ Stará Jímka Lake. Photo E. Břízová. in Quillwort (Isoëtes), A Mysterious Plant From The Czech Republic
Text-fig. 5. Micro- and megaspores of quillwort (Isoëtes). Microspores: 1 – Isoëtes lacustris, WS 33, 2 – 3 Isoëtes, SJ 54, 4 – Isoëtes, SJ 56, 5 – Isoëtes, SJ 75. Megaspores: 6 – 8 Isoëtes, SJ 70. Localities WS Wielki Staw, SJ Stará Jímka Lake. Photo E. Břízová.
Text-fig. 3. Green alga of genus Botryococcus – curve occurrence (quantity %) and findings of quillwort microspores in Prášilské Lake (Analysed by E. Břízová). in Quillwort (Isoëtes), A Mysterious Plant From The Czech Republic
Text-fig. 3. Green alga of genus Botryococcus – curve occurrence (quantity %) and findings of quillwort microspores in Prášilské Lake (Analysed by E. Břízová).
Fig. 1. A in A new isoetalean microsporophyll from the latest Albian of northeastern Spain: Diversity in the development and dispersal strategies of microspores
Fig. 1. A. Geographic location of the studied fossiliferous site of the Estercuel locality, northeast Spain. B. Stratigraphic sequence (modified from Pardo 1979) (B 1) and detailed log (B2) with the stratigraphical level containing studied isoetalean material marked by a black arrow (level ET 2-1).
Fig. 4. A–E in A new isoetalean microsporophyll from the latest Albian of northeastern Spain: Diversity in the development and dispersal strategies of microspores
Fig. 4. A–E. SEM micrographs of isoetalean masses from Isoetites sp. (MPZ 2010/919) from the uppermost Albian of northeastern Spain. In situ microspores showing distal face (A), distal face with characteristic tuberculate ornamentation (B), and proximal face with the laesura extending the whole length of the grain and psilate ornamentation (C–E). F, G. Dispersed isoetalean microspores of the genus Peromonolites from Estercuel deposits similar to herein described in situ ones.
Fig. 3 in A new isoetalean microsporophyll from the latest Albian of northeastern Spain: Diversity in the development and dispersal strategies of microspores
Fig. 3. In situ masses of microspores of isoetalean microsporophyll (MPZ 2010/919) from Estercuel locality, latest Albian. A. Detail of the microsporangium with six masses of microspores, some of them showing a false "trilete" mark (arrows) probably due to a post-sedimentary compression process. B, D. Masses of hundreds of microspores, the false "trilete" mark due to compaction within adjacent polygonal bodies inside microsporophyll (arrow). C. Detail of microspores presumably grouped in tetrads (arrows) showing both proximal and distal faces. B–D, SEM micrographs. Scale bars: A, 5 mm; B, D, 100 μm; C, 20 μm.
Fig. 2 in A new isoetalean microsporophyll from the latest Albian of northeastern Spain: Diversity in the development and dispersal strategies of microspores
Fig. 2. Isoetalean microsporophyll with in situ masses of microspores, from the Boundary Marls unit (uppermost Albian) of Estercuel (Teruel, Spain). A. Explanatory drawing of the microsporophyll in B. Black arrows and the irregular lines indicate the impressions of trabeculae in leaf section. B. MPZ 2010/919. Microsporophyll with the sporangium at base containing masses of microspores (B 1). Detail of the microsporophyll lamina with impressions of trabeculae indicated by white arrows (B 2). Detail of the base of the microsporophyll leaf showing the impression of ligule (B 3). Microsporangium containing masses of microspores (B ). Scale bars: A, B , B , 5 mm; B , B , 1 mm.
Text-fig. 6. Scanning electron microscope (SEM) images of megaspores (a–c) and attached microspores (c, d) with possible affinities to Salviniales; Torres Vedras locality, Portugal. a) Lateral view of Molaspora sp. megaspore showing almost spherical body with a relatively long apical acrolamella; b) Apical view of Molaspora sp. megaspore showing almost spherical body with slightly twisted apical acrolamella; c, d) Lateral view of Arcellites punctatus megaspore showing coarsely rugulate body and apical acrolamella with attached microspores (d). Specimens, TV39-S174616 (a), TV38-S170224 (b), TV43-S170169 (c, d). Scale bars 100 Μm (a–c), 25 Μm (d). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Text-fig. 6. Scanning electron microscope (SEM) images of megaspores (a–c) and attached microspores (c, d) with possible affinities to Salviniales; Torres Vedras locality, Portugal. a) Lateral view of Molaspora sp. megaspore showing almost spherical body with a relatively long apical acrolamella; b) Apical view of Molaspora sp. megaspore showing almost spherical body with slightly twisted apical acrolamella; c, d) Lateral view of Arcellites punctatus megaspore showing coarsely rugulate body and apical acrolamella with attached microspores (d). Specimens, TV39-S174616 (a), TV38-S170224 (b), TV43-S170169 (c, d). Scale bars 100 Μm (a–c), 25 Μm (d).
Text-fig. 5. Scanning electron microscope (SEM) images of megaspores with possible affinities to Isoetales (a–d) and megaspores of uncertain affinity (e–i); Torres Vedras locality, Portugal. a) Paxillitriletes reticulatus megaspore in lateral view showing long appendages on the flanges of the laesurae and the reticulate-spiny distal surface; b) Dijkstraisporites sp. megaspore in oblique lateral view showing long, sometimes dichotomizing, appendages on the equatorial flanges and bordering the laesurae; c, d) Tenellisporites sp. megaspore in proximal view (c) showing equatorial flanges and laesurae with short, broad, flattened and unbranched appendages; note numerous, spiny microspores adhering to the proximal face of the megaspore (d); e) Megaspore type sp. 2 in lateral view showing apical gula and ornamentation of scattered spines; f, g) Megaspore type sp. 3 in lateral (f) and proximal (g) view showing broad, often dichotomously branched appendages covering the megaspore surface; h, i) aff. Flabellisporites sp. megaspores in proximal (h) and lateral (i) view showing long, narrow appendages covering the megaspore surface. Specimens, TV39-S174619 (a), TV38-S170220 (b), TV38-S170221 (c, d), TV44-S174574 (e), TV44-S174575 (f), TV44-S174577 (g), TV38-S170223 (h), TV38-S170222 (i). Scale bars 100 Μm (a–c, e–i), 25 Μm (d). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Text-fig. 5. Scanning electron microscope (SEM) images of megaspores with possible affinities to Isoetales (a–d) and megaspores of uncertain affinity (e–i); Torres Vedras locality, Portugal. a) Paxillitriletes reticulatus megaspore in lateral view showing long appendages on the flanges of the laesurae and the reticulate-spiny distal surface; b) Dijkstraisporites sp. megaspore in oblique lateral view showing long, sometimes dichotomizing, appendages on the equatorial flanges and bordering the laesurae; c, d) Tenellisporites sp. megaspore in proximal view (c) showing equatorial flanges and laesurae with short, broad, flattened and unbranched appendages; note numerous, spiny microspores adhering to the proximal face of the megaspore (d); e) Megaspore type sp. 2 in lateral view showing apical gula and ornamentation of scattered spines; f, g) Megaspore type sp. 3 in lateral (f) and proximal (g) view showing broad, often dichotomously branched appendages covering the megaspore surface; h, i) aff. Flabellisporites sp. megaspores in proximal (h) and lateral (i) view showing long, narrow appendages covering the megaspore surface. Specimens, TV39-S174619 (a), TV38-S170220 (b), TV38-S170221 (c, d), TV44-S174574 (e), TV44-S174575 (f), TV44-S174577 (g), TV38-S170223 (h), TV38-S170222 (i). Scale bars 100 Μm (a–c, e–i), 25 Μm (d).
Text-fig. 7. Scanning electron microscope (SEM) images of spores with possible affinities to lycopodiopsids (a–c) and Schizaeaceae (d–g); Torres Vedras locality, Portugal. a) Densoisporites sp. from a clump of spores in proximal (left) and partial distal views (right) showing the narrow equatorial flange, long laesurae, and reticulum that is coarser on the distal surface than on the proximal surface; b, c) Unnamed microspores from clump of microspores in proximal (b) and distal (c) views showing finely reticulate surface; d, e) Cicatricosisporites ventusus fertile pinnules showing numerous attached sporangia (d) each with terminal annulus (arrowheads) and spores in situ (e); f) Cicatricosisporites sp. 1 spores from fertile pinnules bearing sporangia with a terminal in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Text-fig. 7. Scanning electron microscope (SEM) images of spores with possible affinities to lycopodiopsids (a–c) and Schizaeaceae (d–g); Torres Vedras locality, Portugal. a) Densoisporites sp. from a clump of spores in proximal (left) and partial distal views (right) showing the narrow equatorial flange, long laesurae, and reticulum that is coarser on the distal surface than on the proximal surface; b, c) Unnamed microspores from clump of microspores in proximal (b) and distal (c) views showing finely reticulate surface; d, e) Cicatricosisporites ventusus fertile pinnules showing numerous attached sporangia (d) each with terminal annulus (arrowheads) and spores in situ (e); f) Cicatricosisporites sp. 1 spores from fertile pinnules bearing sporangia with a terminal
Text-fig. 13. Scanning electron microscope (SEM) images of pollen or spore clump with pollen grains or spores of unknown affinity that occur separately or adhering together in dyads, triads and tetrads; Torres Vedras locality, Portugal. a) Clump of pollen or spores that yielded the pollen or spores in this Text-figure; b–f) Grains adhering together in twos, threes or fours (b–e) or occurring singly and apparently with a proximal trilete mark (f); note that the adhering grains are connected by a smooth bandlike covering, perhaps remains of the microspore mother cell; note also abundant orbicules of various sizes among and over the grains. Specimen, TV44-S148149. Scale bars 300 Μm (a), 30 Μm (b–f). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Text-fig. 13. Scanning electron microscope (SEM) images of pollen or spore clump with pollen grains or spores of unknown affinity that occur separately or adhering together in dyads, triads and tetrads; Torres Vedras locality, Portugal. a) Clump of pollen or spores that yielded the pollen or spores in this Text-figure; b–f) Grains adhering together in twos, threes or fours (b–e) or occurring singly and apparently with a proximal trilete mark (f); note that the adhering grains are connected by a smooth bandlike covering, perhaps remains of the microspore mother cell; note also abundant orbicules of various sizes among and over the grains. Specimen, TV44-S148149. Scale bars 300 Μm (a), 30 Μm (b–f).
FIGURE 3. Hygrocybe pellucida. A–F. Basidiocarps. G. Macrospores. H. Microspores. I. Microbasidium. J. Macrobasidium. K. Pseudocystidia. L. Pileipellis. M in Hygrocybe pellucida-a new species of Hygrophoraceae from Kerala State, India
FIGURE 3. Hygrocybe pellucida. A–F. Basidiocarps. G. Macrospores. H. Microspores. I. Microbasidium. J. Macrobasidium. K. Pseudocystidia. L. Pileipellis. M. Stipitipellis. Scale bars: A–F = 10 mm; G–K = 10 µm; L = 25 µm; M = 100 µm. Photos by: K. P. Deepna Latha & P. Haridev.
FIGURE 4. Hygrocybe pellucida. A. Macrospores. B. Microspores. C. Macrobasidia. D. Microbasidia. E. Pseudocystidia. F. Stipitipellis. G in Hygrocybe pellucida-a new species of Hygrophoraceae from Kerala State, India
FIGURE 4. Hygrocybe pellucida. A. Macrospores. B. Microspores. C. Macrobasidia. D. Microbasidia. E. Pseudocystidia. F. Stipitipellis. G. Pileipellis. Scale bars: A–E = 10 mm; G = 20 µm; F = 50 µm. Drawings by: P. Haridev.
The transcriptome of anthers of rice gamyb mutant expressing various GAMYB homologs was measured at the microspore stage.
GEO Series GSE32652. Oryza sativa; Oryza sativa Japonica Group. 12 samples. Type: Expression profiling by array.
The transcriptional landscape of microspore embryogenesis induction in barley
GEO Series GSE233486. Hordeum vulgare. 31 samples. Type: Expression profiling by high throughput sequencing.
The few-celled microspore embryo transcriptome of Brassica napus
GEO Series GSE207576. Brassica napus. 10 samples. Type: Expression profiling by high throughput sequencing.
Exposure of meiosis-to-microspore-stage tomato flowers to long-term mild heat results in pollen failure after mitosis.
GEO Series GSE180168. Solanum lycopersicum. 12 samples. Type: Expression profiling by array.
Profiling of small RNA populations in uninucleate microspores and bicellular pollen of rice
GEO Series GSE101998. Oryza sativa. 3 samples. Type: Non-coding RNA profiling by high throughput sequencing.
High throughput expression profiling of induction of microspore reprogramming to embryogenesis in Brassica napus L. [dataset 1]
GEO Series GSE281890. Brassica napus. 6 samples. Type: Expression profiling by high throughput sequencing.
Gene expression analysis in microdissected shoot meristems of Brassica napus microspore-derived embryos with altered levels of SHOOTMERISTEMLESS
GEO Series GSE35992. Brassica napus. 6 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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