Results 121 to 130 of about 572 (156)
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The Fine Structure of Microgametogenesis in Haemoproteus columbae Kruse*
The Journal of Protozoology, 1968SYNOPSIS. The structural changes leading to the formation of motile microgametes from a single immobile intracellular gametocyte have been examiued in the electron microscope. After pigeon blood infected with Haemoproteus columbae was exposed to the air at room temperature for a few minutes axonemes appeared in the parasite's cytoplasm and the ...
P C, Bradbury, W, Trager
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Scanning Electron Microscopy of Eimeria tenella Microgametogenesis and Fertilization
The Journal of Parasitology, 1977Microgametes of Eimeria tenella were observed in cecal tissue from infected chicks killed six days after inoculation with oocysts. Development from the microgamont stage to maturity was followed. We observed three commonly found, but distinctly different, stages in developing microgametes while they were still associated with microgamonts. In the first,
P A, Madden, J M, Vetterling
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Flora - Morphology, Distribution, Functional Ecology of Plants, 2007
Abstract Anther development, microsporogenesis and microgametogenesis in several species of Heliconia were investigated as part of a complementary embryological study of the Heliconiaceae. All studied Heliconia species present bithecate and tetrasporangiate anthers with fertile pollen grains; only H.
Simao, Daniela Guimaraes +2 more
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Abstract Anther development, microsporogenesis and microgametogenesis in several species of Heliconia were investigated as part of a complementary embryological study of the Heliconiaceae. All studied Heliconia species present bithecate and tetrasporangiate anthers with fertile pollen grains; only H.
Simao, Daniela Guimaraes +2 more
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Arabidopsis exocyst subunit SEC6 is involved in cell plate formation during Microgametogenesis
Biochemical and Biophysical Research Communications, 2022Cytokinesis during pollen mitosis I is critical for cell division and differentiation in the male gametophyte development, but the vesicle trafficking mechanisms in this process are largely unknown. Exocyst is an octameric tethering complex which plays multiple important roles in plant cell vesicle trafficking.
Xiaoyun Tan +7 more
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Ultrastructural observations of microgametogenesis in Eimeria bakuensis (Syn. E. ovina) of sheep
Parasitology Research, 1988The ultrastructure of microgametogenesis of Eimeria bakuensis was studied in the intestinal epithelium of an experimentally infected sheep. During development the nuclei became situated peripherally in the microgamont. Nuclear chromatin condensed into peripheral, dense portions that became the nuclei of the microgametes.
S J, Ball, R M, Pittilo
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Mitochondrial atp6 transcript editing during microgametogenesis in male-sterile sorghum
Current Genetics, 2001A marked reduction of mitochondrial atp6 transcript-editing capability in sorghum anthers and pollen has been invoked as a factor in the loss of viability of male gametophytes in lines carrying the IS1112C male-sterile cytoplasm. We initiated a systematic examination of transcript editing of sorghum atp6 during microgametogenesis, from microspores ...
D R, Pring, H, Van Tang
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MOLECULAR GENETIC ANALYSES OF MICROSPOROGENESIS AND MICROGAMETOGENESIS IN FLOWERING PLANTS
Annual Review of Plant Biology, 2005In flowering plants, male reproductive development requires the formation of the stamen, including the differentiation of anther tissues. Within the anther, male meiosis produces microspores, which further develop into pollen grains, relying on both sporophytic and gametophytic gene functions.
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Fine structural changes associated with microgametogenesis of Eimeria acervulina in chickens
Zeitschrift f�r Parasitenkunde, 1973The fine structure of the changes occurring during microgametogenesis and of the microgametes of Eimeria acervulina was studied in experimentally infected chickens. Early microgametocytes had relatively electron-transparent nuclei with few, scattered, dense masses. Micropores were seen at the surface of these microgametocytes. Intranuclear microtubules
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Australian Journal of Botany, 2010
Microsporogenesis and microgametogenesis of two species, Cardiospermum grandiflorum Sw. and Urvillea chacoensis Hunz. (Sapindaceae, Paullinieae), were studied using light and transmission electron microscopy. Both species are monoecious, with staminate and hermaphrodite, although functionally pistillate, flowers.
Stella M. Solís +2 more
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Microsporogenesis and microgametogenesis of two species, Cardiospermum grandiflorum Sw. and Urvillea chacoensis Hunz. (Sapindaceae, Paullinieae), were studied using light and transmission electron microscopy. Both species are monoecious, with staminate and hermaphrodite, although functionally pistillate, flowers.
Stella M. Solís +2 more
openaire +1 more source