Ultrastructural Studies of Ascosporogenesis in Ascobolus Immersus

Chi-Guang Wu; James W. Kimbrough

doi:10.1080/00275514.1992.12026160

Ultrastructural Studies of Ascosporogenesis in Ascobolus Immersus

Journal

Mycologia

Journal Volume

84

Journal Issue

3

Pages

459-466

Date Issued

1992

Author(s)

Chi-Guang Wu

James W. Kimbrough

DOI

10.1080/00275514.1992.12026160

URI

https://www.tandfonline.com/doi/abs/10.1080/00275514.1992.12026160

https://scholars.tari.gov.tw/handle/123456789/20612

Abstract

Even though spores of Ascobolus immersus are much larger than those of any other species of the genus, ascosporogenesis in this species is basically identical to that of other species of Ascobolus. The spinelike precursors of the epispore layer are connected laterally into numerous periclinal lines. A dark band is formed above the layers of epispore and leaves a translucent zone separating the epispore from the matrix of the perisporic sac. The appearance of a translucent zone causes a fragile “exospure” similar to that found consistently in many coprophilous and pyrophilic discomycetes. Globular opaque bodies of epiplasmic origin and surrounded by amorphous electron dense granules are found in the perisporic sac and appear to be involved in ornament formation. Perisporic sac vacuoles that influence spore ornamentation in A. immersus are contrasted with those of other species of Ascobolus.

Subjects

discomycetes

epispore

perisporic sac

primary and secondary wall ontogeny

Publisher

Taylor & Francis

Type

journal article