microbial groups

Today we learn on topic microbial groups. Biochemical control agent is use other living organism to control or to kill other organism. There are five methods of microbial reproduction which is binary fission, budding, fragmentation, formation of spore and sexual reproduction. We know that The requirements for development of microbial community is physical growth requirement and chemical growth requirement.

Physical growth requirement involve:

1)light

Required/kill by light

2)temperature

a.       Mesophile(25-40 degree cesius)

b.      Psychrophiles(grow at 0 degree bt optimal at 15 degree Celsius)

c.       Psychrotrophs (optimal at 20-30 degree celsius)

d.      Thermophiles (opt at 15 degree Celsius)

3)Ph

Acidophiles-extreme low pH

Alkaliphiles-prefer alkaline condition

4)water acidity and osmotic pressure

Water necessary for growth. Bacteria required high water activity habitat in contrast fungi need lower water activity habitat.

Chemical growth requirement involve:

a)      Water

Important in dissolve nutrients and cellular functions

b)      Carbon

Importance in buiding block and as main sources of energy

c)       Oxygen

Aerobes:need 02

d)      Nitrogen,phosphorus and sulfur

For biosynthesis of protein

e)      Special growth factor

Specifically needed for growth of certain m/os

f)       Trace element

Importance for enzyme function and as cofactor

There are 2 major nutritional which is source of energy and sources of carbon. In development of microbial communities there are 3 process which is selection strategies, succession and biofilms.in selection strategies we have r strategies and k strategies. R strategies have high rate of reproduction so that it will die very fast and have short general time. In contrast k strategies produce slowly that make it more stable and bigger in size. Besides that, there are 3 types of succession which is preemptive colonization,autogenic succession and allogenic succession. Climate community achieve when succession ends but this is rarely achieve. In biofilm, bacteria of same species that stick to surface will colonize and pull another microorganism.