4Thurs_Temperature effects on growth

4Thurs_Temperature effects on growth - Lab Exercise:...

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Lab Exercise: Effects of temperature on growth OBJECTIVES 1. To determine optimum growth temperature and observe effects of temperature on such processes as pigment production. INTRODUCTION Microbes grow over a broad temperature range that extends from below 0° C to above 100° C. Their range is dependent upon their specific cellular enzymes, which will increase in activity as the temperature increases until the point at which they denature. Temperature ranges for individual species consist of the following cardinal temperature points: minimum growth temperature, optimum growth temperature, and maximum growth temperature. Based on these ranges, they can be grouped into the following categories: 1. Psychrophiles: Optimum growth between -5° C and 20° C. These bacteria can be found in supercooled waters of the arctic and anarctic. 2. Psychrotrophs: Mesophilic bacteria that can grow a low temperatures, such as 4° C, or refrigeration temperatures. 3.
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This note was uploaded on 12/23/2009 for the course BIO 205 taught by Professor Murphy during the Fall '09 term at Miramar College.

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4Thurs_Temperature effects on growth - Lab Exercise:...

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