Results 151 to 160 of about 1,486 (189)
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Micron, 2012
Dynamics of plastids and mitochondria during microgametogenesis in watermelon were examined by means of transmission electron microscopy. Plastids are present as proplastids in the microspore and as amyloplasts in the vegetative cell of the bicellular pollen grain, whereas the generative cell is completely devoid of plastids, suggesting that microspore
Lin Liu
exaly +3 more sources
Dynamics of plastids and mitochondria during microgametogenesis in watermelon were examined by means of transmission electron microscopy. Plastids are present as proplastids in the microspore and as amyloplasts in the vegetative cell of the bicellular pollen grain, whereas the generative cell is completely devoid of plastids, suggesting that microspore
Lin Liu
exaly +3 more sources
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.
Vera Lucia Scatena
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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.
Vera Lucia Scatena
exaly +3 more sources
Morphological study of microgametogenesis of Leucocytozoon simondi
Journal of Ultrastructure Research, 1970The fine structure of the microgametocytes and microgametogenesis of Leucocytozoon simondi , a parasite of ducks and geese, was studied and compared to those of the related genus Plasmodia . The morphology of the microgametocyte of L. simondi is identical to that of avian malarial parasites.
M, Aikawa, C G, Huff, C P, Strome
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The action of metabolic inhibitors on microgametogenesis in Plasmodium yoelii nigeriensis
Zeitschrift f�r Parasitenkunde, 1977Mature gametocytes of Plasmodium yoelii nigeriensis were incubated in vitro with a variety of antibiotics whose activities were directed against DNA, RNA, protein and microtubule assembly. Following incubation for periods between 5 and 90 min, exflagellation was induced and the degree of inhibition produced by each drug was assayed microscopically. The
P J, Toyé, R E, Sinden, E U, Canning
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Fine structural study of the microgametogenesis of Eimeria auburnensis
Zeitschrift f�r Parasitenkunde, 1969The microgametogenesis of Eimeria auburnensis from experimentally infected calves killed 16 to 18 days after inoculation was investigated with the electron microscope. Early microgametocytes had nuclei with compact nucleoli and relatively few electron-dense masses.
D M, Hammond +2 more
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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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High voltage electron microscopy on microgametogenesis of Haemoproteus columbae
Cell and Tissue Research, 1974The microgametogenesis of Haemoproteus columbae was investigated by high voltage and conventional electron microscopy and the results were compared. The features of microgametogenesis which have become clear by high voltage electron microscopy include the distribution and arrangement of axonemes in the microgametocyte and the budding process and ...
M, Aikawa, C, Sterling
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Electron microscope studies of microgametogenesis in coccidia and related groups
Zeitschrift f�r Parasitenkunde, 1972The fine structure of the microgamonts and microgametes of coccidia and related groups was investigated and is herein described and diagrammatically depicted. Particular attention is given to the developmental processes during the differentiation of the microgametes. The species included in the study are: Eimeria perforans, E. maxima, E.
E, Scholtyseck +2 more
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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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Fine structure of leucocytozoon caulleryi during microgametogenesis and fertilization
Zentralblatt für Bakteriologie, Mikrobiologie und Hygiene. 1. Abt. Originale. A, Medizinische Mikrobiologie, Infektionskrankheiten und Parasitologie, 1984The fine structure of microgametogenesis and fertilization in Leucocytozoon caulleryi was studied. When the peripheral blood of chickens containing mature gametocytes was withdrawn or ingested by Culicoides arakawae , differentiation of the microgametocytes began immediately.
T, Morii, T, Iijima, M, Fukuda
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