Physiology and fine structure of sporangiospore germination in Piptocephalis unispora prior to infection

  title={Physiology and fine structure of sporangiospore germination in Piptocephalis unispora prior to infection},
  author={P. Jeffries and T. Young},
  journal={Archives of Microbiology},
Germination of the sporangiospore of Piptocephalis unispora Benjamin, observed by means of light and electron microscopy, involved the formation of a new inner wall which became continous with the inner layer of the wall of the germ tube. The outer wall layer of the germ tube was continous with the original inner wall layer of the dormant spore. Preliminary details of appressorium structure were noted. Nutritional experiments indicated that sporangiospores required external sources of… Expand
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Ultrastructure of infection of Cokeromyces recurvatus by Piptocephalis unispora (Mucorales)
Infection of the mucoraceous host Cokeromyces recurvatus by Piptocephalis unispora was studied ultrastructurally, using a new technique involving yeast-phase cells of the host to obtain large numbersExpand
Ultrastructure of Septa in Dimargaris cristalligena R. K. Benjamin
The hyphal septum in Tiegherniomyces californicus is ultrastructurally similar to that of D. cristalligena, and the possible functional and taxonomic significance of such septa is indicated. Expand
Light and electron microscopy of vegetative hyphae, septum formation, and yeast-mould dimorphism inCokeromyces recurvatus
SummaryThe vegetative hypha, septum formation and structure, and the yeast-phase (Y-phase) ofCokeromyces recurvatus have been studied by means of light microscopy and electron microscopy. The septumExpand
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Guttation capsules containing hydrogen peroxide: an evolutionarily conserved NADPH oxidase gains a role in wars between related fungi
The role of NOX proteins in the antagonism of T. guizhouense Δnox1 strain is envisioned as an example of metabolic exaptation evolved in this fungus because the primary function of these ancient proteins was probably not linked to interfungal relationships. Expand


Ultrastructure of the Wall of the Germinating Sporangiospore of Linderina pennispora (Mucorales)
Carbon replicas of germinating sporangiospores of Linderina pennispora show the outer wall complex to break open basally, during the phase of swelling, and the surface of the germ tube to be smooth.Expand
An Electron Microscope Study of Maturation and Germination of Sporangiospores of Two Species of Rhizopus
Immature sporangiospores of Rhizopus nigricans and R. sexualis were relatively thin-walled, although thickened longitudinal ridges were already discernible, and the mitochondria increased in number, probably by division of the large contorted ones of the dormant spore, and were again regularly globose. Expand
Electron microscopy of spore germination and cell wall formation in Mucor rouxii
The fine structure of ungerminated and aerobically germinated sporangiospores of Mucor rouxii was compared and it was found that in the development of one vegetative cell from another, such as in the formation of hyphae from yeast cells, the cell wall is structurally continuous. Expand
Ultrastructure of dormant and germinated sporangiospores ofRhizopus arrhizus
Investigation of dormant and germinated sporangiospores of Rhizopus arrhizus by the use of thin sectioning and freeze-etching procedures revealed the presence of microfibrils and Vesicles, which were rarely observed at the apices of young germ tubes, but were present in abundance in growing hyphal tips. Expand
Cytoplasmic vesicles in germinating spores ofGilbertella persicaria
The findings indicate the delicate nature of hyphal tips and the necessity of avoiding prefixation stresses in order to preserve the apical apparatus of growing hyphae. Expand
Summary: The germination of sporangiospores of Rhizopus arrhizus was investigated, and differing requirements found for the initiation of germination, spore swelling and germ-tube emergence. TheExpand
Scanning electron and light microscopy of appressorium development in Piptocephalis unispora (Mucorales)
Appressorium development in the mycoparasite Piptocephalis unispora was studied using the techniques of critical point drying, sputter coating and light microscopy. Expand
Further studies on germination of sporangiospores of Rhizopus arrhizus.
The effects of either anaerobic conditions or media containing sodium azide, on fine structure of germinating R. arrhizus spores were similar; mitochondrial multiplication ceases, mitochondrial cristae became a disorganized collection of undulating ‘plates’, and the nuclear membrane became split in places, thus giving rise to small vacuoles between the two electron-dense layers of the membrane. Expand
An Ultrastructural Examination of the Structure and Germination of Asexual Propagules of Four Mucoralean Fungi
The purpose of this study was to demonstrate that conidia and single-spored sporangiola are not synonymous and may be readily distinguished from one another on the basis of ultrastructural changes during germination. Expand
Ultrastructure of the sporangiospore of Piptocephalis unispora (Mucorales)
Sporangiospore structure in Piptocephalis unispora Benjamin was studied using light microscopy, freeze-etching, scanning and transmission electron microscopy, and compared with that of other membersExpand