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Zeitschriftenartikel zum Thema „Spores et grains de pollen“

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Veröffentlicht am 25. Mai 2024

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1

Jankovská, Vlasta. "Pollen- and Non Pollen Palynomorphs- Analyses from Svalbard." Czech Polar Reports 7, no. 2 (2017): 123–32. http://dx.doi.org/10.5817/cpr2017-2-12.

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We analysed fifteen samples of a shallow profile “Sverrefjellet Volcano “, located in the NW part of Svalbard – Bockfjord region (see Fig.1). Frequency of pollen grains, spores and NPP (Non Pollen Palynomorphs) was quite low. Only the local taxa (e.g. Salix and Cyperaceae) produced pollen in greater abundance. The pollen spectrum was considerably varied, although pollen grains and spores of most taxa were present in low abundances. This was due to low pollen and spores productivity of the Arctic flora, which propagates mostly in a vegetative way. To obtain as much information from the profile

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Santos, R. P., L. M. Rebelo, E. F. Costa, et al. "Sporopollenin Nanostructure of Ilex paraguariensis A.St.Hil Pollen Grains." Microscopy and Microanalysis 11, S03 (2005): 78–81. http://dx.doi.org/10.1017/s1431927605050932.

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Pollens appear like a fine to coarse powder that is liberated by the microsporangia of Gimnosperms and Angiosperms. The pollen grain wall, the sporoderm, envelopes the microgametophytes (male gametophytes), which produce the male gametes of seed plants. Pollen grains are interesting from the material science point of view since the native polymer, the sporopollenin, found in the sporoderm outer layer (exine), is one of the toughest known materials which is degraded by oxidation but is resistant to reduction. This property permits the sporopollenin persistence as an unaltered polymer in sedimen

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Gavrilova, O. A., G. A. Firsov, D. A. Gornov, A. N. Semenov, and A. V. Volchanskaya. "Pollen of Pterocarya (Juglandaceae) representatives from natural habitats and St. Petersburg environments." Proceedings on applied botany, genetics and breeding 183, no. 1 (2022): 188–98. http://dx.doi.org/10.30901/2227-8834-2022-1-188-198.

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Background. Comparative palynomorphological studies of naturally occurring and introduced Pterocarya Kunth representatives reveal the taxonomic significance of pollen morphological features and pollen characters of cultivated plants. The quality of pollen material and the potential of the plants from the Botanical Garden of BIN RAS for introduction are characterized.Materials and methods. Pollen grains were investigated using light, confocal laser scanning and scanning electron microscopes. Fertility was assessed using the standard acetocarmine method.Results. Comparison of pollen morphology i

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Cyrille, Yao Kouadio, Kouassi Kouamé Alfred, Bie Goha René, Digbehi Zéli Bruno, and Gbangbot Jean Michel Kouadio. "Caractérisation Palynologique et Palynofaciologique de la Marge Est (Marge d’Abidjan) du Bassin Sédimentaire de Côte d’Ivoire." European Scientific Journal, ESJ 18, no. 33 (2022): 144. http://dx.doi.org/10.19044/esj.2022.v18n33p144.

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Des dépôts offshores localisés à l’Est de la marge d’Abidjan (Côte d’Ivoire) ont fait l’objet d’analyse palynologique et palynofaciologique. Elle a porté sur des déblais de forage à partir desquels trente-deux (32) paires de lames minces palynologiques ont été confectionnées. L’objectif était de mettre en évidence les étages du Tertiaire et la limite K-Pg par les palynomorphes stratigraphiques et de déterminer les environnements de dépôt à travers le palynofaciès. Cinq étages ont ainsi été mis en évidence. Ce sont le Maastrichtien supérieur, le Paléocène inferieur, le Paléocène supérieur, l’Eo

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Soares, Emílio Alberto Amaral, Rodolfo Dino, Dominicky Peres Soares, Luzia Antonioli, and Marco Antônio Lima da Silva. "New sedimentological and palynological data from surface Miocene strata in the central Amazonas Basin area." Brazilian Journal of Geology 45, no. 3 (2015): 337–57. http://dx.doi.org/10.1590/2317-488920150030283.

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ABSTRACT The scarcity of stratigraphic data has hindered the demarcation of the outcropping area of Miocene deposits of the Amazon Basin, represented informally by the Novo Remanso Formation. Moreover, this unit is characterized by a sparse and irregular geographic distribution due to its sedimentological features and rare fossil content. Miocene deposits cropping out in central Amazonas Basin area were described in sedimentological terms and analyzed palynologically. All analyses were undertaken in samples collected at the Uatumã River banks (Itapiranga and São Sebastião do Uatumã cities). Li

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Koppelhus, Eva B. "Palynology of the Lower Jurassic R0nne Formation on Bornholm, eastern Denmark." Bulletin of the Geological Society of Denmark 39 (December 20, 1991): 91–109. http://dx.doi.org/10.37570/bgsd-1991-39-11.

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Outcrop material from the Lower Jurassic R!!nne Formation on the Danish island of Bornholm, in the Baltic Sea, has been investigated palynologically. The 34 samples examined came from sections through the Munkerup, Sose Bugt and Galgel0kke Members, which amount to about 210 m in stratigraphic thickness in the type area. The aim of this study was to reevaluate the established stratigraphy defined by Gry (1969) and Gravesen et al. (1982) and characterize the three members by means of palynomorphs. 108 taxa have been recorded of which 67 are spores, 39 are pollen grains and 7 aquatic palynomorphs

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Renault-Miskovsky, Josette, and Michel Petzold. "Spores et pollen." Geobios 22, no. 4 (1989): 545. http://dx.doi.org/10.1016/s0016-6995(89)80109-3.

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Verma, Divya. "PREVALENCE OF AIRBORNE POLLEN GRAINS AND FUNGAL SPORES IN A CITY OF THAR DESERT, INDIA." Journal of Advanced Scientific Research 13, no. 08 (2022): 45–53. http://dx.doi.org/10.55218/jasr.202213808.

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Monitoring of bioaerosols i.e., pollen grains and fungal spores, was undertaken for two consecutive years in a city of Thar Desert- Bikaner, using Gravity Slide Method. A total of 32 different pollen taxa were identified with Annual Pollen Integral (API) of 890 pollen grains per sq. cm in the first year and 906 pollen grains per sq. cm in the second year. The pollen count of non-arboreal plants was much more than that of the arboreal plants. The most prominent annual average pollen percentage was credited to Poaceae (25.91%), followed by Chenopodiaceae/Amaranthaceae (17.57%), Papilionaceae (7.

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Katsimpris, Petros, Christos Nikolaidis, Theodora-Eleftheria Deftereou, et al. "Three-year pollen and fungi calendar in a Mediterranean region of the Northeast Greece." Allergologia et Immunopathologia 50, no. 2 (2022): 65–74. http://dx.doi.org/10.15586/aei.v50i2.491.

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Introduction and objectives: Pollen calendars have been proved clinically important in allergic disease management, as differences in airborne allergens exist not only between different countries but also between regions of the same country as well. This study aims to provide new data regarding the atmospheric pollen and fungi content of a Mediterranean region (Western Thrace/North-East Greece) and discuss seasonal trends, differences in pollen grains and fungi spores’ circulation over the years, and correlations with climate parameters. Material and methods: A 7-day continuously running volum

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Kasprzyk, Idalia. "Co-occurrence of airborne allergenic pollen grains and fungal spores in Rzeszów, Poland (2000-2002)." Acta Agrobotanica 61, no. 2 (2012): 65–73. http://dx.doi.org/10.5586/aa.2008.034.

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The co-occurrence of airborne allergenic pollen grains and fungal spores was estimated in Rzeszów in the years 2000-2002. The volumetric method was used in this aerobiological study. Six taxa of pollen grains and five types of fungal spores characterized by strong allergenicity and/or high concentrations in the air were analyzed. The time series of pollen grains and fungal spores were compared using PCA analysis. The periods of the greatest concentrations of tree pollen did not coincide with similar periods for herbaceous plants and fungal spores. From February to mid-March, <i>Alnus<

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Guarín, Fernando Alzate, Mario Alberto Quijano Abril, Astrid Alvarez, and Ramiro Fonnegra. "Atmospheric pollen and spore content in the urban area of the city of Medellin, Colombia." Hoehnea 42, no. 1 (2015): 9–19. http://dx.doi.org/10.1590/2236-8906-52/2013.

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The atmosphere of the urban area of the city of Medellin, Colombia was monitored with the objective of identifying airborne pollen and spores throughout a whole year. Sampling was performed between February 2010 and March 2011, coinciding with the La Niña climate phenomenon, which is characterized by a considerable increase in precipitation. Samples of airborne spores and pollen were obtained from a suction Hirst-type volumetric sampler. A total of 62 pollen and spores types were recorded during sampling, of which 30 were angiosperms, two were gymnosperms, 10 were monilophytes, and 20 were fun

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Nair, P. K. K. "Pollen spore morphology and plant evolution." Journal of Palaeosciences 45 (December 31, 1996): 130–33. http://dx.doi.org/10.54991/jop.1996.1227.

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Spores and pollen grains both are resistant to environmental stress and diagnostic by virtue of the unique exine characteristics, by which it has emerged as a reliable tool in evolutionary biology, both of fossils and present day plants, at various taxa levels. “Sporae Dispersae” being the only morphological material reflecting continuity of evolutionary lineage through geological time, there is new scope for its application in fixing stratigraphic successions and phyletic origins. The triphyletic theory of the origin and evolution of angiosperms has been explained to demonstrate the value of

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Larsson, Kent, Sofie Lindström, and Dorothy Guy-Ohlson. "An Early Permian palynoflora from Milorgfjella, Dronning Maud Land, Antarctica." Antarctic Science 2, no. 4 (1990): 331–44. http://dx.doi.org/10.1017/s0954102090000463.

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A preliminary palynological study of Beacon Supergroup sedimentary rocks exposed at Milorgfjella, Dronning Maud Land, has yielded a relatively rich and well preserved palynoflora dominated by spores and pollen grains, but also including acritarchs and green algae. The palynoflora is dominated by the pterophyte spores Punctatisporites gretensis, Punctatisporites parvus, Granulatisporites spp., Microbaculispora tentula Horriditriletes spp. and Verrucosisporites andersonii, and the gymnosperm pollen grains Plicatipollenites spp. and Cannanoropollis spp. Also present are the lycopod spore Jayantis

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Kawahata, Hodaka, Rena Maeda, and Hideaki Ohshima. "Fluctuations in Terrestrial–Marine Environments in the Western Equatorial Pacific during the Late Pleistocene." Quaternary Research 57, no. 1 (2002): 71–81. http://dx.doi.org/10.1006/qres.2001.2282.

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AbstractLarge heat storage capacity in the western equatorial Pacific has played an important role in modulating global climate. The fluctuation in pollen and spore abundances, together with organic matter (OM) and lithogenics sedimentation, was investigated to reconstruct terrestrial and marine environmental change around New Guinea during the Late Pleistocene. Although appreciable contribution from Indonesian Maritime Continent was expected, the majority of the pollen and spore grains found in core C4402 was transported from New Guinea. Fern spores accounted for 70% (46–90%) of the total pol

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Golińska, Barbara. "Changes in the concentration of grass pollen in the atmosphere of Poznań." Acta Agrobotanica 59, no. 1 (2012): 317–24. http://dx.doi.org/10.5586/aa.2006.033.

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The aim of the study was to determine the concentrations of grass pollen during the vegetation season in the atmosphere of Poznań against the background of the content of pollen of other plants and mould fungi. Observations were conducted in 1997. Concentrations of pollen grains and spores of mould fungi in the atmosphere were assessed by the volumetric method. For this purpose, the Burkard apparatus (Seven-Day Recording Volumetric Spore Trap) was set up on the roof of the 8-storey high building of the Maximum College of the Agricultural University in Poznań. The continuous, 24-hour work of th

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Dąbrowska-Zapart, Katarzyna, and Tadeusz Niedźwiedź. "Height and hourly variations in the concentration of airborne pollen grains and fungal spores in Sosnowiec (Poland)." Alergoprofil 16, no. 1 (2020): 21–23. http://dx.doi.org/10.24292/01.ap.161120220.

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The aim of the work was to compare the qualitative and quantitative composition of aeroplankton in Sosnowiec (Poland) at three heights. The research was conducted on July 3rd, 4th and 5th, 2018 with the help of three Burkard spore traps: one stationary and two portable ones. The analyses were carried out at an altitude of 83 m, 15 m and at the ground level. Aerobiological data was recorded every hour and the collected pollen grains and fungal spores were determined later on. The relationships between individual meteorological conditions and different features of the alder pollen season were de

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Luz, Cynthia Fernandes Pinto da, Ortrud Monika Barth, and Cleverson Guisan Silva. "Spatial distribution of palynomorphs in the surface sediments of the Lagoa do Campelo lake, North region of Rio de Janeiro State, Brazil." Acta Botanica Brasilica 19, no. 4 (2005): 741–52. http://dx.doi.org/10.1590/s0102-33062005000400009.

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Four samples of the surface sediments of the Lagoa do Campelo lake bottom were collected in a transect of 500 m by 500 m from edge to edge, in a northeast/southwest direction, the dominant wind direction in the region. The analysis of pollen grains, fern spores and algae were used to evaluate their spatial deposition and level of deterioration. In total, 58 types of pollen grains were identified, mainly from herbs as Cyperaceae, Poaceae and Typhaceae. Pollen grains occurred in all the analyzed sediments. The area of highest concentration was the northeast side of the lake. The southwest side s

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Śliwińska-Wyrzychowska, Anna, Kazimiera Chłopek, Edyta M. Gola, and Monika Bogdanowicz. "The usefulness of aerobiological methods in monitoring lycopod sporulation." Plant Ecology and Evolution 151, no. 2 (2018): 284–89. http://dx.doi.org/10.5091/plecevo.2018.1385.

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Background and aims – The purpose of the study was to determine whether the concentration of lycopod spores present in aeroplankton reflects their release during sporulation and whether it is a good indirect tool to estimate the condition of lycopod populations in Poland.Methods – The study was conducted in Sosnowiec, S Poland. The airborne spores were continuously captured by the volumetric spore trap during a period of eleven years (1998–2008). Plant pollen grains and spores from the trap were macroscopically identified, counted and expressed as daily pollen grain and spore concentrations in

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Suc, Jean-Pierre. "Pollen et spores d'europe et d'afrique du nord." Geobios 29, no. 1 (1996): 110. http://dx.doi.org/10.1016/s0016-6995(96)80076-3.

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Osborn, Jeffrey M. "Pollen et spores d'Europe et d'Afrique du Nord." Review of Palaeobotany and Palynology 80, no. 3-4 (1994): 339. http://dx.doi.org/10.1016/0034-6667(94)90010-8.

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Khandelwal, Asha. "Long term monitoring of air-borne pollen and fungal spores and their allergenic significance." Journal of Palaeosciences 51, no. (1-3) (2002): 153–59. http://dx.doi.org/10.54991/jop.2002.1743.

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The qualitative and quantitative analyses of aerospora at Birbal Sahni Institute of Palaeobotany are assessed for the biogenic pollutants of Lucknow atmosphere. The Impaction method was employed for preparing annual pollen and spore calendars over six years (1969-1970, 1970-1971, 1971-1972, 1983-84, 1984-1985, 1985-1986). As many as 61 types of pollen grains and 27 types of fungal spores have been encountered. The maximum numbers of pollen grains were recorded in the year 1985-86 (24383) and minimum in the year 1969-70 (13005), whilst the maximum number of fungal spores encountered were in 197

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Kobzar, V., and K. Osmonbaeva. "Aeroallergens as Indicators of the Anthropogenic Triads." Bulletin of Science and Practice, no. 9 (September 15, 2023): 43–57. http://dx.doi.org/10.33619/2414-2948/94/05.

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The growing interest in the complex issue of climate change, environmental pollution and aeroallergens is reflected in the queries of Internet users in various search engines. Recently, articles have been published on the impact of changes in the traditional land use system on the concentration and species composition of plant pollen and fungal spores. The total effects of the influence of the anthropogenic triad on plant pollen and fungal spores: 1) an increase in the time of the beginning of the growth of plants and fungi and, consequently, the beginning of their production; 2) earlier terms

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Walter, O. J., O. H. Adekanmbi, T. O. Onuminya, and J. D. Olowokudejo. "Evaluation of Pollen Grains and Spores Potential in Revealing Vehicle Travel History on the Ife-Ondo Road, Southwestern Nigeria." Journal of Applied Sciences and Environmental Management 27, no. 8 (2023): 1817–23. http://dx.doi.org/10.4314/jasem.v27i8.28.

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This study focuses on the significance of airborne pollen grains and spores as markers for tracking vehicles along specific routes. Using standard methods, the research examined monthly pollen distribution and its correlation with meteorological data. Dust and soot samples were collected monthly from the car air filters of commercial vehicles traveling on the Ife-Ondo road and subjected to palynological analysis for a period of 24 months. The findings revealed a total of 393 pollen grains and 131 spores, representing 40 pollen and 22 spore types from 27 and 17 families, respectively. Notable m

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Behling, Hermann, and Raquel R. B. Negrelle. "Vegetation and pollen rain relationship from the tropical Atlantic rain forest in Southern Brazil." Brazilian Archives of Biology and Technology 49, no. 4 (2006): 631–42. http://dx.doi.org/10.1590/s1516-89132006000500013.

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The relationship between the southern Brazilian tropical Atlantic lowland rain forest and modern pollen rain was studied by pollen traps. The study was carried out on a one hectare plot undisturbed rain forest of the reserve Volta Velha and two secondary forests, ± 50 and 7 years old. About 248 identified tree, shrub and herb species (excluding epiphytes) of 50 families were represented by 126 different pollen and spore types (including non-local taxa). The calculated average influx of pollen rain from the native Atlantic rain forest was 12465 pollen grains per cm² and year. The influx from th

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Chandra, Anil, and Madhav Kumar. "Palynology of the Late Tertiary sediments (DSDP Site 218) in the Bengal Fan, Indian Ocean." Journal of Palaeosciences 46, no. 3 (1997): 51–69. http://dx.doi.org/10.54991/jop.1997.1348.

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Palynological assemblage from DSDP Site 218 in the Bengal Fan comprises spores, pollen, fungal fruiting bodies and dinoflagellate cysts. The palynofloral composition has minor variation in core no. 27 to 12. The microthyriaceous fungal remains show comparatively higher frequency than other fungal entities. The gymnosperms are represented mostly by the pollen grains of Podocarpaceae and Araucariaceae. Angiosperm pollen are sparsely observed in the assemblage. The pteridophytic spores occur mostly in the bottom and middle cores (core nos. 27-26 and 23-20). Recycled Cretaceous spores have also be

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Balme, Basil E. "Fossil in situ spores and pollen grains: an annotated catalogue." Review of Palaeobotany and Palynology 87, no. 2-4 (1995): 81–323. http://dx.doi.org/10.1016/0034-6667(95)93235-x.

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Tiwari, R. S., and Ram-Awatar. "Sporae-dispersae and correlation of Gondwana sediments in Johilla coalfield, Son Valley Graben, Madhya Pradesh." Journal of Palaeosciences 37, no. (1-3) (1988): 94–114. http://dx.doi.org/10.54991/jop.1988.1604.

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The dispersed spores and pollen grains preserved in the sediments exposed along Johilla River Section, Ganjra Nala Section and in three bore-cores, viz., JHL-23, JHL-24, JHL-25, in Johilla Coalfield have been described. The rich miofloral assemblage consists of 58 genera and 126 species, out of which seven species are new on the basis of their morphological characters. These are - Callumispora paliensls, C. saksenae, Osmundacidites baculatus, Dentatispora mammoida, D. reticulata, Gondisporites reticulatus and Lunatisporites paliensis. On the basis of the composition of spores and pollen

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Thibaudon, M., S. Monnier, and C. Galán. "Pollen et spores fongiques : une norme européenne." Revue Française d'Allergologie 59, no. 8 (2019): 625–26. http://dx.doi.org/10.1016/j.reval.2019.08.004.

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Gedl, Przemysław, and Jadwiga Ziaja. "Palynofacies from Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland, with special emphasis on sporomorph eco-groups." Acta Geologica Polonica 62, no. 3 (2012): 325–49. http://dx.doi.org/10.2478/v10263-012-0018-7.

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ABSTRACT Gedl, P. and Ziaja, J. 2012. Palynofacies from Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków- Silesia Homocline, Poland, with special emphasis on sporomorph eco-groups. Acta Geologica Polonica, 62(3), 325-349. Warszawa. The palynological organic matter of dark clays from Bathonian ore-bearing clays exposed at Gnaszyn (Częstochowa, Kraków-Silesia Homocline, Poland) consists of high proportions of land-derived particles; aquatic elements (mainly dinoflagellate cysts) are comparatively rare. Terrestrial particles include black opaque phytoclasts, dark brown phytoclasts

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Agnihotri, Deepa, S. S. K. Pillai, Neha Aggarwal, Rajni Tewari, Andre Jasper, and Dieter Uhl. "Palynomorphs from the Barakar Formation of Dhanpuri Open Cast Mine, Sohagpur Coalfield, Madhya Pradesh, India." Journal of Palaeosciences 67, no. (1-2) (2018): 171–84. http://dx.doi.org/10.54991/jop.2018.56.

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Well preserved palynomorphs from the Barakar Formation of Dhanpuri Open Cast Mine, Sohagpur Coalfield, Shahdol District, Madhya Pradesh are reported for the first time. The palynomorphs include megaspores and spores/pollen grains. Dispersed megaspores are represented by 6 genera and 13 species comprising Banksisporites indicus, B. utkalensis, Banksisporites sp., Barakarella shuklae, Barakarella sp., Biharisporites sp. Bokarosporites rotundus, Bokarosporites sp., Jhariatriletes baculosus, Jhariatriletes sp., Talchirella flavata, T. trivedii and Talchirella sp. The microspore assemblage shows do

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Bhivgude, S. W. "Curvularia As Bio-pollutant in the Houses of Asthmatic Patients at Ambajogai Dist. Beed (MS)." Plantae Scientia 2, no. 3 (2019): 45–47. http://dx.doi.org/10.32439/ps.v2i3.45-47.

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Indoor Curvularia spores are potential sensitizers in human beings, their prevalence is important for diagnosis and environmental management of asthma. Human beings are known to suffer from major allergens such as fungal spores, pollen grains and house dust present in the atmosphere. Inhalation of air borne fungal spores is the main causative factor for respiratory allergic diseases in human beings. Indoor survey of aeromycoflora was performed by using Rotorod air sampler, Petri plate exposure and eosinophil count of asthmatic patient in Ambajogai. The highest concentration of Curvularia spore

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Tripathi, R. P., B. D. Sharma, and K. L. Shrivastava. "Plant microfossils from the lignite deposit (Eocene) of Barsinghsar in Bikaner District, Rajasthan, India." Journal of Palaeosciences 47 (December 31, 1998): 110–15. http://dx.doi.org/10.54991/jop.1998.1278.

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Plant microfossils from the Eocene lignite sample collected from Barsinghsar near Bikaner, Rajasthan have been described in this paper. The plant microfossils include algal filaments and nets, fungal hyphae and spores, bryophytic thalli and capsules (?), pteridophytic cuticles and spores, cuticles of gymnosperms and various kinds of pollen grains, and cuticles and peculiar fructifications (?) of angiosperms. Palaeoecological conditions during sedimentation of Eocene lignite in Rajasthan have also been discussed.

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IANOVICI, Nicoleta, Cristina MARIA, Mădălina Nicoleta RĂDUŢOIU, Anca HANIŞ, and Dorina TUDORICĂ. "Variation in Airborne Fungal Spore Concentrations in Four Different Microclimate Regions in Romania." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 41, no. 2 (2013): 450. http://dx.doi.org/10.15835/nbha4129032.

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Airborne fungal counts and types were examined in four regions from Romania. The aim of our study was to determine the concentrations of Alternaria, Cladosporium, Drechslera-type, Epicoccum and Nigrospora atmospheric fungal spores in urban areas: Braşov, Bucharest, Cluj-Napoca and Timişoara. Other objective of this study was to examine the relationships between atmospheric fungal spores and pollen. Few studies have confirmed the high frequency and concentrations for some of these spore types in Romania. The sampling sites differed in habitat characteristics, such as vegetation and microclimate

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KLEPZIG, MIRIAN CAZZULO. "Significado Peleoecológico de Alguns Palinomorfos Ocorrentes nos Carvões Eopermianos do Rio Grande do Sul, Sul do Brasil." Pesquisas em Geociências 28, no. 1 (2001): 81. http://dx.doi.org/10.22456/1807-9806.20169.

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Organic-walled palynomorphs of unknown botanical affinity identified in Early Permian coals from Rio Grande do Sul State, South Brazil, together with spores and pollen grains are analysed in this study. Among the identified taxa are: Tetraporina punctate, Tetraporina horologia, Maculatasporites gondwanensis, Brazilea scissa, Quadrisporites horridus, Quadrisporites lobatus, Pilasporites calculus, Portalites gondwanensis. Besides these palynomorphs, some considerations about Botryococcus braunii, a colonial alga occurring in the associations are presented. The morphological similarity between th

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Chan-Yeung, Moira, and Santiago Quirce. "Aeroallergens and Asthma." Canadian Respiratory Journal 1, no. 4 (1994): 248–56. http://dx.doi.org/10.1155/1994/780479.

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The main aeroallergens in both the indoor and outdoor environment that have been implicated in the pathogenesis of allergic asthma are reviewed. Pollen and fungal spores are important outdoor aeroallergens that cause sensitization in atopic subjects, leading to rhinitis and asthma in a proportion of the sensitized subjects. Each pollen type displays a particular seasonal periodicity: tree pollen are prevalent in the late winter and spring, grass in the spring and summer and weed mainly in the fall. There are regional differences in the type of pollen grains in Canada. Although the pollen grain

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Pant, D. D., and Rita Singh. "Possible fossil sporae dispersae of hepaticae and anthocerotales in the fossil records." Journal of Palaeosciences 39, no. (1-3) (1990): 20–36. http://dx.doi.org/10.54991/jop.1990.1679.

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The paper attempts to find the characters which can distinguish the spores of Hepaticae and Anthocerotales from iso- or micro-spores of pteridophytes and pollen grains of gymnosperms and angiosperms for the identification of possible fossil Sporae dispersae of bryophytes reported from different geological horizons. The problem was approached by looking for characters in fossil spores which are (i) exclusively bryophytic, (ii) prevailingly bryophytic, and (iii) closely matching characters of in situ spores of fossil bryophytes in a first-hand comparison. Our account also takes into consideratio

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Calderón LLosa, Oscar Manuel, Denisse Cevallos Levicek, Germán Ramón, et al. "Initial study of trap and identification of environmental pollens and fungi spores in Samborondon, Ecuador." Revista Alergia México 71, no. 1 (2024): 52. http://dx.doi.org/10.29262/ram.v71i1.1322.

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Initial study of trap and identification of environmental pollens and fungi spores in Samborondon, Ecuador Introduction: The identification of local aeroallergens in any geographical area is essential for the specific diagnosis and treatment of allergic diseases. Our objective was to identify and registry the most important aeroallergens trapped at the aerobiology station in the city of Samborondon, Ecuador.Material and methods:Pollen grains and fungal spore counts were performed according to the standardized technique with a Hirst-type collection equipment, Burkard spore trap for seven days,

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Verma, Poonam, Nivedita Mandal, Mahesh G. Thakkar, M. R. Rao, and Sunil Bajpai. "Palynological record from Chhasra Formation (Early Miocene), Eastern Kutch, Gujarat." Journal of Palaeosciences 62, no. (1-2) (2013): 149–55. http://dx.doi.org/10.54991/jop.2013.340.

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A moderately diverse palynoflora consisting of angiospermous pollen and pteridophytic spores has been recorded from poorly known Chhasra Formation (Early Miocene) exposed in a section near Palasawa in eastern Kutch, Gujarat, western India. Dinoflagellate cysts are absent in the section, whereas the fresh water Centropyxis, a testate amoeba, is recorded. Among the important genera recovered are: Hammenisporis, Khariasporites, Acanthotricolpites, Spinizonocolpites, Spinomonocolpites, Retitrescolpites, Meliapollis, Ctenolophonidites, Palaeomalvaceaepollis, Graminidites and Ericipites. Preliminary

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Punt, Wim. "Pollen et spores d'Europe et d'Afrique du nord. Supplement 1." Review of Palaeobotany and Palynology 97, no. 3-4 (1997): 395. http://dx.doi.org/10.1016/s0034-6667(97)00005-5.

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Svobodová, Helena. "M. Reille: Pollen et spores d'europe et d'afrique du nord." Folia Geobotanica 32, no. 1 (1997): 24. http://dx.doi.org/10.1007/bf02803881.

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Shu, Ouyang, Deng Xi-Guang, Shen Yan-Bin, Zheng Xiang-Shen, and Liu Xiao-Han. "Late Triassic plant microfossils from Miers Bluff Formation of Livingston Island, South Shetland Islands, Antarctica." Antarctic Science 12, no. 2 (2000): 217–28. http://dx.doi.org/10.1017/s0954102000000274.

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A moderately diverse assemblage of plant microfossils has been recovered from the Johnsons Dock Member of the Miers Bluff Formation, Livingston Island, including spores, pollen, acritarchs, wood fragments and cuticles. Containing a total of c. 45 of miospore taxa, the palynoflora is dominated by non-striate bisaccate pollen, but spores of pteridophytes and pollen of gymnosperms are proportionate in diversity. The palynoflora is similar in composition to those indicative of subzones C + D of the Alisporites Zone of Antarctica, and the upper Craterisporites rotundus Zone and the lower Polycingul

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Sandesh Thaware, Jayshree. "ELECTRON MICROSCOPIC STUDIES OF SOME ANTICANCER PLANTS POLLEN GRAINS." International Journal of Advanced Research 9, no. 10 (2021): 1386–93. http://dx.doi.org/10.21474/ijar01/13695.

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Pollen is appropriately referred by some as Golden dust extremely valuable on account of their tremendous applications in science, industries and public health. No other plant part even though extremely tiny in size is packed with so much information and power. Similar to other plant parts, pollen characters are so varied that the classification system of plants can be built up entirely on the basis of pollen morphology.Palynology is the distinct branch of biology that deals with the dispersed microscopic tiny living and fossil entities including pollen grains, spores, algal and fungal fragmen

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Ajikah, Linus Bashie, Shadrak Alebiosu Olugbenga, Emuobosa Akpo Orijemie, and Dough Owojoku Onah. "review of aeropalynology research in Nigeria." Allergologia et Immunopathologia 49, no. 6 (2021): 31–38. http://dx.doi.org/10.15586/aei.v49i6.241.

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Background: Aeropalynology is a branch of palynology that studies the content of atmospheric pollen grains and spores. The amount, concentration, and distribution of these aerospora are influenced by the seasonal flowering of parent plants and variations in climatic conditions as well as local and regional variabilities. Atmospheric pollen grains and spores are diverse and have been identified as major biological particles that trigger immune cells to release inflammatory chemical mediators, inducing respiratory-linked and allergic conditions, such as polli-nosis, among susceptible individuals

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Barreto, Cintia F., Cynthia F. P. da Luz, José A. Baptista-Neto, Claudia G. Vilela, and Ortrud M. Barth. "Palynological analysis of a sediment core obtained in Guanabara Bay, Rio de Janeiro, Brazil." Anais da Academia Brasileira de Ciências 79, no. 2 (2007): 223–34. http://dx.doi.org/10.1590/s0001-37652007000200005.

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The sediment of a core collected about 2 km north of Paquetá Island, Guanabara Bay, was submitted to pollen analysis, in order to recognize the dynamics of the regional vegetation, and the anthropic influence. Radiocarbon dating of a sample next to the bottom of the core indicates an age of 4.210 ± 40 14C yrs B.P (calibrated age). It was possible to establish four palynological zones. Starting at the bottom of the core, a decrease in palynomorph concentration, the presence of degraded pollen grains and spores, and the predominance of ombrophilous forest pollen grains were observed in the basal

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Mandaokar, B. D. "Occurrence of palynofossils from the Tirap River section (Disang Group), Tinsukia District, Assam." Journal of Palaeosciences 48, no. (1-3) (1999): 239–43. http://dx.doi.org/10.54991/jop.1999.1307.

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Disang shale exposed on the Tirap River section yielded 23 genera and 24 species of palynomorphs. The palynoassemblage is dominated by pteridophytic spores and angiospermic pollen grains, whereas gymnospermic elements are rare. The presence of Striatriletes, Polypodiisporites, Schizaeoisporites, Striacolporites, Lakiapollis, Tricolpopollenites, Phragmothyrites and Inapertisporites suggests an Eocene age to the assemblage.

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Pummer, B. G., H. Bauer, J. Bernardi, S. Bleicher, and H. Grothe. "Birch and conifer pollen are efficient atmospheric ice nuclei." Atmospheric Chemistry and Physics Discussions 11, no. 10 (2011): 27219–41. http://dx.doi.org/10.5194/acpd-11-27219-2011.

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Abstract. The ice nucleation of bioaerosols (bacteria, pollen, spores, etc.) is a topic of growing interest, since their impact on ice cloud formation and thus on radiative forcing, an important parameter in global climate, is not yet fully understood. Here we show that pollen of different species strongly differ in their ice nucleation behaviour. The average freezing temperatures in laboratory experiments range from 240 K to 255 K. As the most efficient nuclei (silver birch, Scots pine and common juniper pollen) have a distribution area up to the Northern timberline, their ice nucleation acti

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Pummer, B. G., H. Bauer, J. Bernardi, S. Bleicher, and H. Grothe. "Suspendable macromolecules are responsible for ice nucleation activity of birch and conifer pollen." Atmospheric Chemistry and Physics 12, no. 5 (2012): 2541–50. http://dx.doi.org/10.5194/acp-12-2541-2012.

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Abstract. The ice nucleation of bioaerosols (bacteria, pollen, spores, etc.) is a topic of growing interest, since their impact on ice cloud formation and thus on radiative forcing, an important parameter in global climate, is not yet fully understood. Here we show that pollen of different species strongly differ in their ice nucleation behaviour. The average freezing temperatures in laboratory experiments range from 240 to 255 K. As the most efficient nuclei (silver birch, Scots pine and common juniper pollen) have a distribution area up to the Northern timberline, their ice nucleation activi

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DYUZHOVA, K. V. "SUBRECENT POLLEN ASSEMBLAGES IN ALLUVIAL DEPOSITS OF THE DON AND KUBAN RIVERS AND THEIR SIGNIFICANCE FOR PALAEOGEOGRAPHIC RECONSTRUCTIONS." Lomonosov Geography Journal 79, no. 1 (2024) (2024): 48–60. http://dx.doi.org/10.55959/msu0579-9414.5.79.1.4.

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The paper presents the results of studying modern alluvial deposits of the Don and Kuban rivers by the pollen analysis method. The study was carried out to clarify methodological issue, including the movement of pollen and spores by flowing waters. The obtained data show that pollen assemblages of river sediments formed in the process of pollen mixing by water and air characterize the composition of the regional vegetation cover rather than local nearriver plant groups. According to the results for the subrecent sediments of the Don River the transfer of pollen grains and spores by water was i

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Santos, Artai A., Laura Piñuela, Iván Rodríguez-Barreiro, Jose Carlos García-Ramos, and José B. Diez. "Palynology from “The Jurassic Dinosaur Coast” of Asturias (Lastres Fm., Northwestern Spain): Palynostratigraphical and Palaeoecological Insights." Biology 11, no. 12 (2022): 1695. http://dx.doi.org/10.3390/biology11121695.

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Abundant fossils of vertebrates (mainly footprints and bones of dinosaurs) and numerous invertebrates occur in the Upper Jurassic deposits of the Lastres Formation in the Asturias region, North of Spain. However, no palynological study has been published from this geological formation; therefore, much palaeoenvironmental and palaeoecological information is still unknown. In this study, a total of 62 morphospecies, belonging to 49 different morphogenera were identified, including pollen, spores, algae remains, fungi spores, dinoflagellates, foraminifera, and scolecodonts from four different loc

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Gazi, Md Yousuf, Subrota Kumar Saha, SM Mainul Kabir, and Md Badrul Imam. "Sedimentological and Palynological Approach for Determining the Depositional Environment of the Outcropping Surma Group Mudrocks in the Sitakund Anticline, Chittagong-Tripura Fold Belt, Bangladesh." Dhaka University Journal of Science 66, no. 1 (2018): 37–42. http://dx.doi.org/10.3329/dujs.v66i1.54542.

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Sitakund anticlinal structure exposes about 1.5 km of Surma group sediments and has been chosen for a comprehensive study of the mudrocks depositional environment based on sedimentological and palynological evidences. Five mudrock facies have been identified in this region. They are Mudstone Dominated, Sand/Silt Streaked Shale, Fissile Shale, Laminated Shale and Lenticular Bedded Shale. The palynological assemblages from these samples have been analyzed qualitatively, and a variety of pollen, spores, algae and fungi identified. The pollen and spores have been attributed to parent plants locate

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