pollen grain

Listing 1 - 10 from 72 for pollen grain

pollen grain morphology juniper
pollen grain morphology juniper Juniperus (Cupressaceae) Juniperus osteosperma Thompson & Anderson SW Veg. Change Juniperus osteosperma Uppsala University Juniperus deppeana C.Drew UofAz Palynology Plant: Members of the Cupressaceae possess scale-like leaves appressed to the terminal twigs. Female cones may be woody or fleshy. Junipers (Juniperus) are common shrubs or short trees of temperate ...
www.geo.arizona.edu

pollen grain morphology ephedra
pollen grain morphology ephedra Ephedra (Ephedraceae) Ephedra antisyphilitica(l) E. coryi(r) S.Ickert-Bond Ephedra viridis UofAz 2409 UofAz Palynology Ephedra nevadensis SEM C.Drew UofAz Palynology Plant: Ephedra (joint-fir, ... U.S.A. Journal of Paleolimnology. 19 (4): 417-427. King J. E.,W. R. Sigleo. 1973. Modern pollen in the Grand Canyon, Arizona. Geoscience and Man,7:73-81. Steeves, M.W. and ...
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Gilding the Lily: Developments in Asiatic Hybrid Lilies
... female parent, and the other set of 12 chromosomes will have been inherited from the male, or pollen parent. When sexual cells from the female parent fuse with the sexual cells from the male parent, ... go awry, and instead of producing a normal sex cell with 12 chromosomes, the egg cell or pollen grain will contain 24 chromosomes. Should these abnormal cells fuse to produce a viable seed, that seed ...
gardenline.usask.ca

Subdivision Cycadicae
... are gymnosperms, i.e, they possess naked seeds which are borne in an exposed position on the sporophyll. The conifers are the most numerous of this Division and do not resemble the other 3 groups at all. Go to Next Page for an explanation of pollen grain development. Return to Main Menu Division Pinophyta
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Subdivision Cycadicae
Subdivision Cycadicae Development of Pollen Grain A stalk cell and body cell develop from the generative cell. As the body cell elongates, the pollen tube begins to develop. Two multiflagellated sperm develop from the body cell. Part of a developing ovule at the time of fertilization. Return to Main Menu Division Pinophyta
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PalDat Homepage - worldwide largest database and most comprehensive resource on pollen and palynology
... Accedunt Tabulae Lithographicae XVIII. Vratislaviae. pdf (13,6 MB) Wodehouse R., 1928. The phylogenetic value of pollen grain characters. Ann. Bot. 42: 891-934. pdf (9 MB) Wodehouse R., 1933. Tertiary ... Formation. Bull. Torrey Bot. Club 60: 470-524. pdf (28,2 MB) Wodehouse R., 1935. Pollen grains. Their structure, identification and significance in science and medicine. McGraw-Hill Book Company, New ...
paldat.botanik.univie.ac.at

Glossary of Pollen and Spore Terminology - New terms
... H)] [Part 3 (I-O)] [Part 4 (P-R)] [Part 5 (S-Z)] [Literature] Glossary of Pollen and Spore Terminology New Terms There are two special versions of this page, both without headers, ... sulci and distal disulcate with paired sulci lying parallel to the long axis of the pollen grain on the distal face. Examples: Metroxylon salomonense (Palmae) (equatorial disulcate), Chamaerops humilis (Palmae) (distal ...
www.biol.ruu.nl

Glossary of Pollen and Spore Terminology - Part 2 (D-H)
... (Bignoniaceae), Phyllanthus spp. (Euphorbiaceae). See also: colpodiporate, diploporate. Endocingulum (pl. endocingula, adj. endocingulate) (Reitsma, 1966) A ring-shaped endoaperture continuous around a pollen grain and lying in the equatorial plane. Example: Polygonum convolvulus (Polygonaceae). Synonym of colpus equatorialis and zonorate. Endocrack (Oldfield, 1959) An irregular groove occurring ...
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Pollen abnormalities
... are actually dead inside. Measuring the percentage of non-living (= often distorted, malformed, or small) pollen to estimate meiotic incompatibility/ hybridization has been a standard technique for more than 50 years ... the baby, mostly the baby, so probably this "hybrid-distortion" provides clues to how the pollen grain wall actually develops. If one knows the parents, can one predict the kind or ...
www.passionflow.co.uk

Passiflora pollen adhesion
... Ph.D., assistant professor of molecular genetics & cell biology at the University of Chicago. When a pollen grain of the right species lands on the pistil and comes into contact with a female ... Greir and undergraduate student Ben Zwiebel created a novel tool to measure the strength of the pollen-stigma bond designed using the same principles as an atomic force microscope. The researchers attached a ...
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