ISSN:
1432-072X
Keywords:
Allomyces
;
Phycomycete
;
Ultrastructure
;
Gametangial differentiation
;
Autophagy
;
Gamma bodies
;
Multivesicular bodies
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The ultrastructure of gametangial development in Allomyces macrogynus was determined from longitudinal sections of gametophytic hyphae at stages of differentiation from vegetative apices at time zero to fully cleaved gametangia at about 150 min. Whereas vegetative hyphae show an apical clustering of mitochondria, cytoplasmic vesicles and microtubules, this arrangement was sharply altered in early development. Mitochondria were evenly redistributed, apical vesicles and microtubules disappeared, and autophagic vacuoles became prominent. Subsequently, electron-dense granules and microbody/lipid droplet complexes became evident and later, during gamete cleavage, developed into gamma bodies and side-body complexes respectively. Meanwhile cytoplasmic vesicles were involved in exit papilla formation. The significance of autophagic vacuoles and multivesicular bodies is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00492020
