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J Bacteriol. 1969 June; 98(3): 883-887
Copyright © 1969 American Society for Microbiology. All Rights Reserved.

Resistance of Vegetative Cells and Microcysts of Myxococcus xanthus

^a Department of Microbiology, University of Minnesota, Minneapolis, Minnesota 55455

ABSTRACT

The resistance of vegetative cells and of microcysts of Myxococcus xanthus to several destructive agents was compared. Fruiting-body microcysts were 300 times more resistant to 60 C, 5.4 times more resistant to ultraviolet light, and 19.3 times more resistant to sonic vibration than were vegetative cells. Whereas resistance to sonic vibration developed during the conversion of rods to refractile spheres, resistance to heat did not appear until after the conversion was complete. Both vegetative cells and microcysts of the yellow variant of this strain were more resistant to ultraviolet irradiation than was the tan variant.

¹ Public Health Service Career Development Awardee (5KO3 GM 05869-06).

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