Electron Microscopy of Ascus Development in Ascobolus

Oso, B. A.

doi:10.1093/oxfordjournals.aob.a084267

Cited by 27 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the first application of the electron microscope to the study of ascus ontogeny much has been learned about ascospore formation in a wide variety of genera (Conti and Naylor 1960;Delay 1966;Wilsenach and Kessel 1965 ;Reeves 1967;Carroll 1967Carroll , 1969Oso 1969;Furtado and Olive 1970;Wells 1972;etc.). Mainwaring (1971) pointed out that, excepting Saccharonlyces cerevisiae Meyen (Moens 1971), all fine-structure studies on ascosporogenesis have demonstrated that ascospores are delimited within the ascus cytoplasm by a pair of concentric unit membranes, and that the primary wall of the ascospore is formed between these two membranes, 'Scientific paper No.…”

mentioning

confidence: 99%

Fine structure of ascospore formation in Poronia punctata

Stiers¹

1974

Can. J. Bot.

View full text Add to dashboard Cite

STIERS, D. L. 1974. Fine structure of ascospore formation in Porot~iaprrtrctata. Can. J. Bot. 52: 999-1003. Ascospore ontogeny in Pororria putrctata is described. At the time of complete delimitation the ascospore is enclosed within two membranes, the spore plasma membrane to the inside and the investing membrane to the outside. The initial ascospore wall is the primary wall, formed by deposition of electron-transparent material between these two membranes. Differentiation within the region occupied by the primary wall begins with the development of a n electrondense epispore adjacent to the highly convoluted spore plasma membrane. Immediately after the epispore is differentiated the mesospore begins to form between the epispore and the spore plasma membrane. The mesos ore becomes about twice as thick as the epispore. With the formation of the mesospore, digerentiation and development within the region formerly occupied by the electron-transparent primary wall is complete. The outer portion of the primary wall, that between the epispore and the ~nvesting membrane, is the perispore. After formation of mesospore, epispore, and perispore, electron-transparent material is deposited centripetally between the spore plasma membrane and the mesospore. This innermost wall is the endospore. STIERS, D. L. 1974. Fine structure of ascospore formation in Porotricrprn~ctata. Can. J. Bot. 52: 999-1003. L'auteur dCcrit I'ontogCnkse de l'ascospore de Porotiia proictata. Au moment oh elle est complktement dClimitCe, l'ascospore est entourCe de deux membranes: la membrane plasmique de la spore B I'intCrieur et la membrane enveloppante B 1'extCrieur. La paroi initiale de l'ascospore est la paroi primaire, formCe par la dCposition d'un materiel transparent aux electrons entre ces deux membranes. Dans la rigion occupCe par la paroi primaire, la diffkrenciation commence avec le dCveloppement d'une Cpispore dense aux Clectrons et adjacente B la membrane plasmique fortement convolutCe de la spore. Immkdiatement aprks la diffirenciation de l'Cpispore, la ~nCsospore commence B se former entre 1'Cpispore et la membrane plasmique de la spore. La mCsospore devient environ deux fois plus ipaisse que 1'Cpispore. La formation de la mCsospore complkte la diffkrenciation et le dCveloppement dans la rigion originalement occupee par la paroi prirnaire transparente aux Clectrons. La partie externe de la paroi primaire, celle qui se situe entre 1'Cpispore et la membrane enveloppante, est la pirispore. A la suite de la formation de la mCsospore, de 1'Cpispore et de la pCrispore, un materiel dense aux Clectrons est dCpost de f a~o n centripkte entre la membrane plasmique de la spore et la mCsospore. Cette paroi interne est l'endospore.[Traduit par le journal]Since the first application of the electron microscope to the study of ascus ontogeny much has been learned about ascospore formation in a wide variety of genera (

show abstract

mentioning

confidence: 99%

Fine structure of ascospore formation in Poronia punctata

Stiers¹

1974

Can. J. Bot.

View full text Add to dashboard Cite

show abstract

“…The former observations of the emergence of double membranes which delimit ascospore initials have been seen repeatedly during ascosporutation in diverse yeasts and molds and the matter of free-cell formation has been reviewed thoroughly by Reeves (1967). More recent work also showed the presence of double membranes during ascospore formation in Podospora anserina (Beckett, Barton & Wilson, 1968), Ascobolis viridulus (Oso, 1969), Nematospora coryli (Plurad, 1972), Xylosphaerapolymorpha (Beckett & Crawford, 1970) and Taphrina deformans (Syrop & Beckett, 1972). In the case of Taphrina, direct continuities between the ascus plasmalemma and the double membrane system were revealed by phosphotungstic acid-chromic acid straining (Syrop & Beckett, 1972).…”

Section: Resultsmentioning

confidence: 98%

Ultrastructural aspects of ascosporulation inArthroderma quadrifidum (=Trichophyton terrestre)

1976

View full text Add to dashboard Cite

The ultrastructural features of developing and mature ascospores were delineated after mating Arthroderma quadrifidum on pablum cereal agar. Incipient ascospores each contained a granulated nucleus bounded by a nuclear envelope while presumptive ascospore cytoplasm was bounded by a double membrane and resided in glycogen-rich epiplasm of the ascus. Mature ascospores contained nuclei and mitochondria while the ascus epiplasm still retained abundant inclusions. The ascospore wall demonstrated the presence of heterogeneous material between the plasmalemma and the outer spore membrane which appeared smooth.

show abstract

“…1970;GREENHALGHetal. 1970;MAINWARING 1972;OSO 1969;REEVES 1967;STIERS 1974STIERS , 1976TYSON et al 1976;WELLS 1970WELLS , 1972WILSENACH et al 1965;ZiCKLER 1970;etc.). The ascospores are delimited by the invagination and constriction of the AD membrane that separates a certain amount of plasm from the ascoplasm and surrounds each of the nuclei.…”

Section: Discussionmentioning

confidence: 99%

“…REEVES (1967) andWILSENACH et al (1965) suggest that the ER elements give rise to the ascus vesicle membranes which eventually round up the nuclei and surrounding cytoplasm. Oso (1969) finds that the membrane system is formed by coalescence of vesicles budded from the nucleus. STIERS (1976) illustrates that the pre-existing membrane fragments give rise to the ascospore delimiting membrane.…”

Section: Discussionmentioning

confidence: 99%

Ultrastructure of Ceratocystis ulmi.¹ II. Ascogenous system and ascosporogenesis

Jeng

Hubbes

1980

European Journal of Forest Pathology

View full text Add to dashboard Cite

show abstract

Electron Microscopy of Ascus Development in Ascobolus

Cited by 27 publications

References 0 publications

Fine structure of ascospore formation in Poronia punctata

Fine structure of ascospore formation in Poronia punctata

Ultrastructural aspects of ascosporulation inArthroderma quadrifidum (=Trichophyton terrestre)

Ultrastructure of Ceratocystis ulmi.¹ II. Ascogenous system and ascosporogenesis

Contact Info

Product

Resources

About

Electron Microscopy of Ascus Development in Ascobolus

Cited by 27 publications

References 0 publications

Fine structure of ascospore formation in Poronia punctata

Fine structure of ascospore formation in Poronia punctata

Ultrastructural aspects of ascosporulation inArthroderma quadrifidum (=Trichophyton terrestre)

Ultrastructure of Ceratocystis ulmi.1 II. Ascogenous system and ascosporogenesis

Contact Info

Product

Resources

About

Ultrastructure of Ceratocystis ulmi.¹ II. Ascogenous system and ascosporogenesis