Effect of hydrostatic pressure on the morphology and ultrastructure of wild-type and trehalose synthase mutant cells of Saccharomyces cerevisiae.

Abstract:

AIMS:Saccharomyces cerevisiae was used for studying the physiological effects of hydrostatic pressure. METHODS AND RESULTS:The effects of hydrostatic pressure on the ultrastructure of wild-type and trehalose-6-phosphate synthase (tps1) mutant cells were investigated by transmission electron microscopy. Pressure induced several morphological changes in wild-type and tps1 cells, the latter showing greater structural alterations. When the cells were submitted to a preheat treatment they both acquired resistance to the pressure treatment. CONCLUSION:As the tps1 mutant was 1000-fold more barosensitive than its parental strain, it showed greater structural alterations compared with the wild-type. Microscopic images of the yeast cells suggested that hydrostatic pressure induced changes in the cytoskeleton and therefore, on the cell wall and in the dynamics of the organelles. SIGNIFICANCE AND IMPACT OF THE STUDY:This work presents the effects of hydrostatic pressure on the morphology of yeast cells and confirms the importance of several different factors in the protection of cells against stress.

journal_name

Lett Appl Microbiol

authors

Fernandes PM,Farina M,Kurtenbach E

doi

10.1046/j.1472-765x.2001.00853.x

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

42-6

issue

1

eissn

0266-8254

issn

1472-765X

pii

lam853

journal_volume

32

pub_type

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