Morphology of pollen in Ferula genus (Apiaceae) (original) (raw)
Related papers
Studies on Pollen Morphology of the Selected Ornamental Plants
2021
Pollen morphology is part of flower to identification on the family, generic or specific level and approach in plant systematic and evolution. Therefore, this study aimed to observation and describe the pollen morphology be using light microscope. This paper present own observation about the structure and morphology of pollen was described in detail using the following parameters i.e., their pollen size, pollen shape, apertures, pollen exine ornamentation, pollen surface, pollen unit, pollen symmetry, polarity, pollen orientation which may be very useful in identification and classification of pollen grain. Pollen morphology of eighteen plant species for examined. Fresh pollen samples were collected.
Pollen morphology of six species of subfamily
2016
The pollen morphological characters of 6 species belonging to 4 genera of the subfamily Stachyoideae (Lamiaceae) growing naturally in Saudi Arabia were investigated with the aid of light microscope (LM) and scanning electron microscope (SEM), to find new features that might increase knowledge of pollen morphology of the species, and also to help the taxonomic characterization of the Stachyoideae genera. The morphological characters studied were size, shape, tectum surface ornamentation, number and type of the colpi. The study indicated that the average size of the pollen was different among the species since the smallest size was that of Nepeta deflersiana (P = 25.2 ± 2 and E = 15 ± 3) while the largest size was that of Salvia aegyptiaca (P =36.5 ± 2 and E = 30.3 ± 2). Pollen shape is spheroidal to sub-spheroidal or prolate. The fine structure of the exine of pollen was slightly different among investigated species. The number and type of colpi of the pollen in species studied were 6-zonocolpate type except those of N. deflersiana and Otostegia fruticosa ssp. schimperi having 3-zonocolpate.
Studies on pollen morphology ofRosaceae
Acta Botanica Gallica, 1994
Light and scanning electron microscope studies of pollen representing geo1era from all tribes of the Rosaceae reveal a variety of form and sculpturing. All genera examined produce radially symmetric isopolar monads. Most genera in subfamilies Maloideae, Prunoideae, and Sp/raeoideae produce tricolporate striate grains with large perforations in valleys between ridges. These tectate perforate grains have a chambered pore covered by arching ektexinal pore flaps. The ridge-and-valley pattern can vary from t-long ridges parallel to the colpus, to 2-medium to long ridges looping near the poles, to 3 • short weaving and crossing ridges. Striate perforate pollen occurs in tribes Dryadeae, Kerrieae, Roseae (operculate) and Rubeae of subfamily Rosoideae. in some Rubus species perforate and verrucate sculpturing occurs. Tribe Potentilleae (= Fragarieae) produces pollen with microperforations rather than typical perforations and most genera have an operculum. Coluria. Fallugia, Geum, Orthurus, and Wa/dsteinia of Dryadeae produce striate microperforate pollen, suggesting that they may belong in the Potentilleae. Filipendula (Uimarieae) is prominently verrucate. Tuberculate perforate sculpturing occurs in Cercocarpus, Cowan/a, and Purshia suggesting a natural group distinct frcm the rest of the family. The diverse Poterieae (= Sanguisorbeae) has mainly tricolporate and some hexacolporate (Sanguisorba) grains all with an operculum. Some genera (Agrimonia group) have striate pollen, but most have microverrucae and perforations. Within the tribe, a distinctive group of mainly south hemispheric genera (Acaena. Cliffortia, Cowania. Hagenia, Leucosidea, Margyricarpus, Polylepis, Tetrag/ochin) has tricolporate perforate pollen, often with a short colpus, sculpturing of macroverrucae and rugulae covered by micro~errucae. These pollen characteristics suggest a distinct evolutionary lineage. Re~ume.-L'etude en microscopie optique et electronique du pollen de genres representant toutes les tribus de Rosaceae revele une variate de formes et d'ornementations. Les pollens de tous les genres etudies son! des mona
Bangladesh Journal of Botany, 1970
Pollen grains of 20 taxa from two genera of the Liliaceae were examined and compared by LM (light microscope), SEM (scanning electron microscope) and pollens of four taxa were also examined with TEM (transmission electron microscope). Pollen grains shed as monads. They are monosulcate and ellipsoidal. Fritillaria crassifolia subsp. crassifolia Freyn & Smt. sometimes sheds the pollen as dyads. Exine is semitectate and the tectum is perforate. Columellae are simplicolumellate. Ectexine is thicker than endexine. Exine sculpture (ornamentation) is reticulate, reticulate-rugulate, rugulate and retipilate in Asparagus pollens and reticulate, suprareticulate, rugulate-reticulate and striate-reticulate in Fritillaria pollens. Sulcus extends from distal to proximal in some pollens of Asparagus and Fritillaria.
© 2009 Bangladesh Association of Plant Taxonomists POLLEN MORPHOLOGY OF AGROPYRON GAERTNER IN TURKEY
2015
Pollen morphology of Agropyron cristatum (L.) Gaertner. s.s. (subsp. incanum (Nábĕlek) Melderis and subsp. pectinatum (M. Bieb.) Tzvelev, latter including var. pectinatum and var. imbricatum (Roemer & Schultes) G. Beck) in Turkey has been studied by using light microscope and scanning electron microscope. The above-mentioned taxa are homogenous in both aperture type and exine ornamentation. Pollen grains are monoporate (rarely diporate in the case of var. imbricatum) having scabrate grouped exine surface. The scabra density and the height of scabrae as well as other morphological parameters such as annulus and operculum diameter are peculiar features for differentiation of taxa. Two different phenograms were created with the UPGMA (Unweighted Pair Group Method with Arithmetic mean) clustering technique using quantitative measurements of the pollen grains.
Pollen grains of 39 taxa of the genus Fritillaria L. in Turkey were examined by light and scanning electron microscopy. Detailed pollen morphological characteristics are given for these taxa. Our investigation shows that the sculpturing of the exine provides valuable characters for separating species. In particular, sculpturing of the exine at the proximal face turned out to be taxonomically important. Six types of ornamentation were determined: reticulate, reticulate-perforate, suprareticulate, rugulate-reticulate, psilate-perforate, and perforate. On the basis of exine sculpturing, the sulcus membrane, and the apex sulcus, 5 main pollen types are recognised.
The pollen morphology of 2 species of the genus Cornus L. distributed in Turkey was studied with light and scanning electron microscope. The pollen of genus Cornus is 3-colporate. Pollen of the Cornus mas is spheroidal and Cornus sanguinea is subprolate. Size varies of Cornus mas pollen with the polar axis ranging from 21.54 to 27.36 μm and equatorial axis from 21.31 to 26.72 μm. Size varies of Cornus sanguinea pollen with polar axis ranging from 54.41 to 71.69 μm and equatorial axis from 46.03 to 63.42 μm. The equatorial outline of Cornus mas pollen is triangular and Cornus sanguinea pollen is circular. The results showed that pollen of these two species can easily be identified as species level.
Pollen taxonomy is the prerequisite to compare the pollen present in honey samples with special reference to melissopalynological investigation. There is a scope to prepare pollen reference slides of flowering plants visited by honeybees of different ecological regions. The present study was undertaken during March 2010 to June 2012 in Western Ghats of Karnataka. Sixty eight flowering plants visited by honeybees were collected from Western Ghats of Karnataka and pollen morphological studies have been carried out. Species belonging to family Astraceae pollen are spinolous spherical in shape. The different species in families Fabaceae has a great morphological diversity. They also have variation in symmetry, position and distribution of apertures, exine structure and sculpture of the pollen wall. The pollen grain of plants belonging to family Malvaceae is echinate. Species of family Myrtaceae pollen are colporate and prolate.