Results 181 to 190 of about 4,169 (206)

In vitro sporogenesis in a fern

Zeitschrift für Pflanzenphysiologie, 1972
Summary In vitro developed plants of Ceratopteris thalictroides, obtained from gametophytes, developed sporangia and functional spores on a simple nutrient medium. Fertility was beset with senescence.
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‘Endogenous Factor’ in Sporogenesis in Bacteria

Nature, 1963
EXTENSIVE investigations on the morphological changes during sporogenesis have afforded valuable information about this phenomenon1. The initiation of eporulation can be better understood if the metabolic events during the transition from a vegetative cell to its sporulating phase are known. Several attempts have been made to investigate the physiology
V. R. SRINIVASAN, H. ORIN HALVORSON
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Phospholipid acylhydrolases trigger membrane degradation during fungal sporogenesis

Fungal Genetics and Biology, 2011
Armillaria ostoyae is a phytopathogen infecting coniferous trees. Fruiting bodies of this basidiomycete contain high phospholipase A(1) (PLA(1)) activity. In this paper, the role of phospholipid-deacylating activity, which was also detected in fruiting bodies of other basidiomycetes, in the fungal lipid metabolism is elucidated. For A.
Martin, Dippe, Renate, Ulbrich-Hofmann
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Regulation of Bacterial Sporogenesis

1982
Previous speakers have stressed some important features of gene expression and regulation in different eukaryotic systems. My communication will deal with similar problems but revealed in a prokaryotic system, endowed with the properties to undergo differentiation.
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Sporogenesis and gametogenesis in some Cyperaceae

Proceedings / Indian Academy of Sciences, 1976
The paper is an account of some salient embryological features in four genera and five species belonging to the family Cyperaceae (Eleocharis atropurpurea, E. congesta, Fimbristylis tetragona, Fuirena trilobites andScirpus lateriflorus). InE. atropurpurea double pollen grains are occasionally observed. Their significance in systematic considerations of
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Ultrastructural investigations on sporogenesis inEquisetum fluviatile

Protoplasma, 1984
The spore mother cells ofEquisetum fluviatile undergo meiotic division, each forming a tetrad of spores. The spore protoplasts are separated from each other by an accumulation of mitochondria (organellar plate) at first and later on by plasma membranes, no cell wall is formed.
H. Lehmann, H. V. Neidhart, G. Schlenkermann   +2 more
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Metabolic Requirements for Microcycle Sporogenesis of Bacillus megaterium

Journal of Bacteriology, 1967
Spores of Bacillus megaterium QM B1551 germinated, elongated, and resporulated (microcycle sporogenesis) in simple chemically defined media which permitted no cell division. The second-stage spores thus produced were heat-stable and required heat activation for germination.
P K, Holmes, H S, Levinson
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FINE STRUCTURE OF PLASMODIOPHORA BRASSICAE IN SPOROGENESIS

Canadian Journal of Botany, 1967
The vegetative Plasmodium of Plasmodiophora brassicae is contained within host cell cytoplasm. The multinucleate Plasmodium contains numerous large lipid droplets and is replete with mitochondria, dictyosomes, endoplasmic reticulum, and ribosomes. A 250 Å thick osmiophilic plasmodial envelope is characteristic of the vegetative Plasmodium.
P. H. Williams, Sharon S. McNabola
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Sporogenesis and Prothallial Development in Ceratopteris thalictroides

Botanical Gazette, 1960
1. The prothalli of Ceratopteris thalictroides (L.) Brongn. were hermaphroditic in culture as well as in nature (14). They were asymmetric and irregularly lobed. 2. Prothalli bearing only antheridia, as reported by Kny (12), were also obtained in cultures, but in extremely small proportions. Prothalli with archegonia only were not found. 3. Development
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Sporogenesis

2023
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