Nutritional requirements of microorganisms

Nutritional requirements of microorganisms

1. 6. BASIC NUTRITIONAL REQUIREMENTS OF MICROORGANISMS Faculty: Aftab H. Abbasi RN, DCHN, BSN, MA, LL.B Lecturer Nursing Qadri College of Health Sciences Karachi QADRI COLLEGE OF HEALTH SCIENCES, KARACHI

2. BASIC NUTRITIONAL REQUIREMENTS OF MICROORGANISMS INTRODUCTION: Nutrients are substances used in biosynthesis and energy release and therefore are required for microbial growth.

3. BASIC NUTRITIONAL REQUIREMENTS OF MICROORGANISMS Essential Nutrients: The sources of common essential nutrients are: 1- Carbon 2- Hydrogen 3- Nitrogen 4- Oxygen 5- Phosphorus And 6- sulfur . 

4. BASIC NUTRITIONAL REQUIREMENTS OF MICROORGANISMS NUTRITIONAL TYPES OF MICROBES : Microbes  can be grouped nutritionally on the basis of how they satisfy their requirements for carbon, energy, and electrons or hydrogen. Indeed, the specific  nutritional requirements  of  microorganisms  are used to distinguish one  microbe  from another for taxonomic purposes.

5. BASIC NUTRITIONAL REQUIREMENTS OF MICROORGANISMS Four nutritional types of microorganisms: Photolithotrophic autotrophy (they utilize light energy, with the inorganic compound water serving as the ultimate electron donor) Photo- organotrophic heterotrophy ( Photoheterotrophs (Gk:  photo  = light, hetero = (an)other, troph = nourishment) are   heterotrophic   phototrophs – that is, they are organisms that use light for energy) Chemolithotrophic autotrophy ( Chemolithotrophy  is a type of metabolism where energy is obtained from the oxidation of inorganic compounds) Chemo- organotrophic heterotrophy . (“ Chemoheterotroph ” is the term for an organism which derives its energy from chemicals, and needs to consume other organisms in order to live. ... These organisms – almost always bacteria – require both inorganic chemical energy sources, and other organisms whose organic materials they can consume, in order to survive)

6. BASIC NUTRITIONAL REQUIREMENTS OF MICROORGANISMS Microorganisms  may be grouped on the basis of their energy sources. Two sources of energy are available to microorganisms. Microbes that oxidize chemical compounds (either organic or inorganic) for energy are called  chemotrophs ; those that use light as their energy sources are called  phototrophs .  

7. BASIC NUTRITIONAL REQUIREMENTS OF MICROORGANISMS A combination of these terms with those employed in describing carbon utilization results in the following nutritional types :   1. Chemoautotrophs :   microbes  that oxidize  inorganic chemical  substances as sources of energy and carbon dioxide as the main source of carbon. 2. Chemoheterotrophs : microbes that use organic chemical substances as sources of energy and organic compounds as the main source of carbon. 3. Photoautotrophs :  microbes that use light as a source of energy and carbon dioxide as the main source of carbon. 4. Photoheterotrophs :  microbes that use light as a source of energy and organic compounds as the main source of carbon.

8. BASIC NUTRITIONAL REQUIREMENTS OF MICROORGANISMS

9. BASIC NUTRITIONAL REQUIREMENTS OF MICROORGANISMS

10. BASIC NUTRITIONAL REQUIREMENTS OF MICROORGANISMS

11. The common nutrients which are found to be required in all living things include carbon, nitrogen, sulfur, phosphorus, potassium, magnesium, calcium, oxygen, iron and additional trace elements. Both macro- and micro-nutrients are critical in proper organismal growth as they play important roles in cellular and metabolic processes. The limiting nutrient is essential for growth and based on its concentration and presence or absence can control growth. Key Terms micronutrient : an element or nutrient required in small quantities. macronutrients : any element or nutrient required in large amounts.

12. BASIC NUTRITIONAL REQUIREMENTS OF MICROORGANISMS

13. BASIC NUTRITIONAL REQUIREMENTS OF MICROORGANISMS

14. QADRI COLLEGE OF HEALTH SCIENCES, KARACHI