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Temperature profiles and alginate synthesis in mucoid and non‐mucoid variants of Pseudomonas aeruginosa
Author(s) -
Alves M.J.,
Martins L.O.,
SáCorreia I.
Publication year - 1991
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/j.1472-765x.1991.tb00550.x
Subject(s) - pseudomonas aeruginosa , humanities , microbiology and biotechnology , library science , art , biology , bacteria , computer science , genetics
Alginate‐producing Pseudomonas aeruginosa 8821 spontaneously produced low‐ and high‐alginate‐producing variants that had low and high specific activities of GDP‐mannose dehydrogenase and high and low specific growth rates, respectively. The optimal temperature for alginate production was 10°C below that for growth in the case of the high‐producer but they were the same for the low‐producer. In short duration thermal death experiments, alginate protected cells against lethal temperatures, although the maximal temperature for growth of the mucoid variants (43°C) was lower than that for the non‐mucoid strain (44°C). The temperature profiles were associative and above 37°C growth concurred with thermal death.