What question did this study set out to answer?

To determine the physiological factors governing temperature limits for growth, respiration, enzyme activity, and substrate transport in psychrophilic versus mesophilic yeast.

August 1, 1962Canadian Journal of Microbiology

Observations on the Physiology of Psychrophilism in a Yeast

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Authors

RBR. M. BaxterUniversity of North Carolina at Charlotte NGN. E. GibbonsWestern University

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Implication

Comparative physiological study reveals enhanced low-temperature substrate uptake and respiration in psychrophilic Candida, indicating membrane permeability facilitates cold adaptation.

Key Points

To determine the physiological factors governing temperature limits for growth, respiration, enzyme activity, and substrate transport in psychrophilic versus mesophilic yeast.
Measured intact cell survival, growth rates, respiration, and alcohol dehydrogenase activity across 0 °C to 30 °C in a psychrophilic Candida species and mesophilic Candida lipolytica.
Quantified the rate and temperature dependence of glucosamine uptake between 0 °C and 30 °C in both yeast species.
Glucosamine uptake in the psychrophile remained rapid from 0 °C to 30 °C, whereas the mesophile exhibited negligible uptake at 0 °C and 10 °C and markedly reduced uptake at 20 °C compared to 30 °C.
Respiration in the psychrophilic species was faster than in the mesophile across all temperatures up to 30 °C, with the greatest difference observed between 0 °C and 10 °C.
Cell growth in the psychrophile was more sensitive to temperatures above 10 °C than survival, respiration, alcohol dehydrogenase activity, or glucosamine uptake.

Cite This Study

Baxter et al. (1962) studied this question.

synapsesocial.com/papers/6a99ec123984bcb448b4f6b0 https://doi.org/10.1139/m62-066

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Implication

Comparative physiological study reveals enhanced low-temperature substrate uptake and respiration in psychrophilic Candida, indicating membrane permeability facilitates cold adaptation.

Observations on the Physiology of Psychrophilism in a Yeast

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Implication

Key Points

Cite This Study

Observations on the Physiology of Psychrophilism in a Yeast

Discussion

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Implication

Key Points

Cite This Study

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