MBIO 1010 Lecture Notes - Lecture 12: Halotolerance, Growth Medium, Generation Time
8 May 2017
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A defined medium that provides the minimum nutritional requirements for growth (ie. no growth factors) = bare minimum. Picky organisms aren"t go(cid:374)(cid:374)a grow o(cid:374) (cid:373)inimal medium = self- sufficient and none pick bacteria grow on minimal medium. Blood agar t-soy plate + 5% sheep"s blood. Allows differentiation of hemolytic bacteria a incomplete destruction of blood cells. Contain ingredients that inhibit the growth of unwanted microbes. Allow only specific microbes to grow: ex. Contains very high salt, so that only halotolerant bacteria will grow. Enriched medium: supplemented with special nutrients to encourage the growth of fastidious bacteria, complex nutrient requirements require many growth factors. Microorganisms grouped into energy classes depending on their source of electrons and energy: Use organic carbon for building cell carbon and biomass. Use co2 to synthesize cell carbon: a. k. a. primary producers. Growth: measured as an increase in the number of cells. Binary fission: cell division following enlargement of a cell to twice its minimum size.
