bacteria

1. Nutrition in Bacteria
 Presented by….
Gohil Sanjay B.
M.Sc. Sem 1
Botany CBO -401
Department of Life
science,
H.N.G.U. Patan.

2. Content
• Introduction
• Nutritional type of Bacteria
• Fermantation
• Putrefication
• Parasitic bacteria
• Respiration

3. Introduction
• Bacterial need enough suitable nutrients for
its growth and reproduction.
• Enough nutrients such as a carbon source a
nitrogen source,electron donars and trace
elements are necessary for the growing
bacteria.
• Bacteria are extra ordinarily diverse in their
specific nutrient requirements.

4. Nutritional types of bacteria
• The various nutritional types of bacteria
are discuss below:
• On the basis of nutrition, bacteria are
divided basically into two groups.
1] Autotrophic
2] Heterotrophic

5. 1] Autotrophic bacteria
• There are some bacteria which are able to
synthesize organic compounds necessary for
there structure and matabolism from simple
inorganic compunds. it’s called autotrophic
bacteria.
• The autotrophic bacteria are thus of two types,
photosynthetic and chemosythetic. the former
are also called photosynthetic autotrophs and
the latter non-photosynthetic autotrophos.

6. • Autotrophic bacteria

7. [2]Photosynthetic bacteria
• These include all the three , coccal bacillary and
spirillum irorms .
• all are anaerobes which grow in light and are
usually found in sulphur spiring where hydrogen
sulphide is normally present .
• the two common examples of photosynthetic
bacteria are the purple sulphur bacteria and
green sulphur bacteria.

8. • The former contain and carotenoids add the
photosynthetic pigments as the latter chlorophyll.
• The pigments under the light microscope appear
to be uniformly distributed in the cytoplasm.
hydrogen combines cells sulphur bacteria but
excreted in the green sulphur bacteria .the
reaction is:
2H2 S + CO2 ---light/ carbohydrates------> (CH2O ) +2S+H2O
• There are non-sulphur purple and brown bacteria
found in the mud and stagnant water . light is still
the source of energy.

9. [2]Chemosynthetic bacteria
• These are non –
photosynthetic
autotrophs (nitrifiying
bacteria) which lack
pigments. They get
energy for food synthesis
by the oxidation of
certain inorganic
substance such as
ammonia ,nitrites ,
ferrous iron.

10. [2]Heterotrophic bacteria
• “Heterotrophs are a
group of
microorganismd(yeast,mo
ulds&bacteria)that use
organic carbom as food
(as opposed to
aututrophs like algae that
use sunlight)and are
found in every type of
water .detecting
heterotrophs in water is
done by using a method
called heterotrophic plate
count.’’

11. (A)Saprophytic bacteria
• They grow in dead, decaying organic
material,and live by digesting and absorbing
them.in the cource of obtaining food for
themselves, the saprophytic bacteria gradually
break down complex organic compounds into
simpler products . This they do by secreting
enzymes.the breakdown of carbohydrates is
called fermentation.

12. Fermentation
• The word fermentation comes from a latin
word meaning “to boil”.it refers to bubbling
due to the carbon dioxide given off. The
fermentation of sugar by yeast is the classic
example . Certain species of bacteria are able
to ferment glucose and galactose. lactic acid
fermentation is principally carried out by
bacteria.

13. Putrefecation
• Various species of bacteria are principally
concerned in the decomposition of protiens
into simpler compounds. The earlier stages in
protein putrefaction take place in the absence
of oxygen.
• They are brought about by an enzyme
produced by the anaerobic bacteria
concerned in the process. As a result the
complex protein compounds are reduced

14. Parasitic bacteria
• They live on or within living organisms both
plant and animals.
• They obtain the organic food from the host on
which they grow.not all parasitic bacteria cause
disease.some may be harmless to their hosts
and others cause serious disease in them.
• The numerous coli bacteria inhabiting the
intestines in man and most other organism are
the typical examples of this kind.

15. Respiration
• Like other living thinhs bacteria respire.they
oxidize food materials present in the
cytoplasm to obtain energy.
• Most bacteria make use of the free oxygen of
the atmoshere or oxygen dessolved in the
liquid environment.
• They are called the Aerobes of aerobic
bacteria

16. Referance
• Botany for degree student- fungi
• Www.google.com

17. THANK YOU