Results 181 to 190 of about 749,082 (227)

[Dimorphism in fungi--a gray zone for taxonomy?].

Zentralblatt fur Mikrobiologie, 1989
Dimorphic fungi can grow as mycelial phase and as yeast phase. The change of growth form is effected by an altered programme in gene expression, which is induced either in certain stages of ontogenesis or by environmental factors. Therefore it is necessary to distinguish ontogenetically conditioned (irreversible) and environment conditioned (reversible)
H, Kreisel, F, Schauer
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The Genetics of Dimorphism in the Smut Fungi

1993
Dimorphic growth in Ustilago maydis is regulated by mating-type loci called a and b. The b region encodes two polypeptides (bE and bW) which control the formation of the infectious dikaryon upon fusion of haploid, yeast-like cells of opposite a mating type.
J. Kronstad, A. Yee, G. Bakkeren, S. Gold, K. Barrett, L. Giasson   +5 more
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[Dimorphism of fungi - review of the literature].

Zentralblatt fur Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite naturwissenschaftliche Abteilung: Mikrobiologie der Landwirtschaft der Technologie und des Umweltschutzes, 1983
A recherche of 260 publications about dimorphism of fungi was elaborated. Beginning with the term dimorphism of fungi a description was represented of the distribution in the classes of the fungi, the ontogenesis of both types of the growth, the habits of dimorphic species of fungi, the conditions of the cultivation for the induction and maintenance of
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[The role of sterols in morphogenetic processes and dimorphism in fungi].

Mikrobiologiia, 2007
The review considers the fundamental biological problem of fungal dimorphism as an adaptive reaction to adverse impacts. Primary attention is paid to sterols, phospholipids, storage lipids, and fatty acids. The structural and biological functions of sterols are considered, as well as their role in membrane stabilization under stress and their relation ...
I S, Mysiakina, N S, Funtikova
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[Dimorphic fungi: biochemical approach to their dimorphism].

Acta cientifica venezolana, 1998
Dimorphism in pathogenic fungi is reviewed. The phenomenon is divided into four interwoven events: (a) perception of external stimuli by cellular sensors; (b) translation into a biochemical message; (c) alteration of the genomic expression, and (d) structural reorganization towards the morphological change. Experimental evidence is provided.
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[Phase transition in dimorphic fungi].

Biofizika, 2001
The morphogenetic process, the transition from the micelial to fungal growth phase in imperfect microscopic dimorphic fungi Phaeococcomyces de Hoog (strain Ch49), induced by high concentrations of transition metal ions, was considered in terms of the phase transition theory.
Iu A, Kumzerov, L K, Panina
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A systematic survey of dimorphic and polymorphic fungi.

Česká Mykologie, 1981
Various definitions of the term dimorphism in fungi are briefly discussed and a general concept is given with a suggested morphological classification of the dimorphism. Dimorphism (and polymorphism) is delimited as an environmentally controlled reversible phenotypic duality (or plurality in the case of polymorphism) in the morphogenesis of the ...
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Biochemical and Molecular Aspects of Dimorphism in Fungi

2019
Most of the eukaryotic differentiation processes are unidirectional. However, fungi have the ability to grow reversibly as unicellular yeast (Y) or as filamentous hypha (H) in response to the specific strain-dependent environmental stimuli. Such a phenomenon known as “dimorphism” is not limited to a specific class of fungi.
Ejaj K. Pathan, Vandana Ghormade, Redeemson Panmei, Mukund V. Deshpande   +3 more
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An Introduction to Dimorphism among Zoopathogenic Fungi

1985
Many fungi have a remarkable ability to alter normal vegetative developmental sequences in response to environmental change. This ability is common among the fungi responsible for the majority of different human mycoses. With the invasion of tissue and the establishment of infection, certain fungi that are pathogenic for humans differentiate into ...
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Immunological Aspects of Dimorphic Fungi in AIDS

1990
The hallmark of an infection with human immunodeficiency virus (HIV) is a selective depletion of CD4+ lymphocytes and an associated progressive decline of immunological function to the point the host becomes overwhelmed by opportunistic infections or malignancies (McChesney and Oldstone, 1989; Schupbach, 1989). Since CD4+ cells are essential components
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