ISSN:
1432-072X
Keywords:
Neurospora crassa
;
Microcycle conidiation
;
Heat-treatment
;
Cyanide-sensitive and insensitive respirations
;
Mitochondrial structure
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Changes in both respiratory pathways and mitochondrial structure of Neurospora crassa occurred under conditions of microcycle conidiation. Upon heat-treatment at 46°C, conidia developed a highly cyanide-insensitive, hydroxamate-sensitive respiration associated with morphological alterations in mitochondrial membranes; such changes were time-dependent. When heat-treated conidia were shifted down to 25°C, the alternate, hydroxamate-sensitive respiration decreased significantly, paralleling the recovery of well-cristated mitochondria with an electron-dense matrix in the germ tubes. The decrease in hydroxamate-sensitivity was associated with two periods of increase in cyanide sensitivity corresponding to the events of germination and precocious proconidial budding.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00403197
