文档介绍：Chapter 4
Nutrition and medium of microbes
(微生物的营养和培养基)
Nutrition: the most basic physiological function anisms to intake the energy and material that is necessary for living and reproduction from the outside environment .
(营养是指生物体从外部环境中摄取对其生命活动必需的能量和物质,以满足正常生长和繁殖需要的一种最基本的生理功能.)
Nutrient: it is referred to as the nutritional material including the unconventional material form——ray radiation in microbiology.
(营养物则是指具有营养功能的物质,在微生物学中,它还非常规物质形式的光辐射能在内.)
Nutriton and nutrient
Section A
six nutritional elements of microbes
(微生物的六类营养要素)
The position of the anism cells and their metabolite determines what nutrient they need.
As bacteria are a very disparate group of microbes that can exist in a wide range of environments, and can be split into a number of different nutritional groups with very different prerequisites for growth, the ingredients in the medium will depend on the individual species. mon requirements of all bacteria are water, a source of energy, carbon, nitrogen, essential anic ions such as phosphate, sulfate, sodium, calcium, magnesium, potassium and iron and a number of trace elements (Zn, Mn, Mo, Se, Co, Cu, Ni, W). For heterotrophs, energy and carbon can be derived from the same molecule.
position of the microbe cell
carbon, hydrogen, oxygen , nitrogen and essential anic ions such as phosphate, sulfate, sodium, calcium, magnesium, potassium and iron and a number of trace elements (Zn, Mn, Mo, Se, Co, Cu, Ni, W)
: water,carbohydrates, protein, nucleic acid, lipoid, vitamine, antibiotic , anic ion.
Elemental level
Compound level
source
source
source
factor
salts
Level of Nutritional elements
What does a microbe need for growth?
Carbon source are defined as all the nutrients that can satisfy the need for carbon during the process of microbial growth. It is also called macronutrients(大量营养物) in that it is in the most greatest need only secondary to water. The spectrum of carbon sources (碳源