Heterotrophic mode of nutrition in plants classVII science

1. HETEROTROPHIC NUTRITION
There are some plants which do not have
chlorophyll .They cannot synthesise their
own food .Like humans and animals such
plants depend on the food produced by
others .
1. Parasitic plants
2.Insectivorous plants
3. saprotrophs

2. Thank you
Made by :-
Sushila Dhankhar

3. PARASITIC PLANTS
 CUSCUTA : Yellow tubular structures
twining around the stem and branches of
the tree . This plant is called cuscuta.

4. PARASITIC PLANTS
•
Cuscuta do not have chlorophyll .
It takes ready made food from the
plant on which it is climbing . The
plant on which it climbs is called
is a host . Since it deprives the
host of nutrients , it is called
parasite. This type of nutrition
is called parasitic nutrition

5. INSECTIVOROUS PLANTS
• There are few plants Growing in
nitrogen deficient soils which can
trap insects and digest them .such
plants may be green colour or of
some other colour.such insect eating
plants are called insectivorous plants

6. INSECTIVOROUS
PLANTS
• Pitcher plant

7. INSECTIVOROUS PLANTS
• Pitcher plant Venus flytrap

8. SAPROTROPHIC NUTRITION
• The mode of nutrition in which organisms take
in nutrients in solution form from dead and
decaying matter is called saprotrophic
nutrition.
• Organisms secrete digestive juices on dead
and decaying matter and convert into solution
form. Ex : Fungi, some bacteria.

9. SAPROTROPHIC NUTRITION
Mushroom Bread Mould

10. SYMBIOTIC RELATIONSHIP
• It is a type of biological interaction between
two different living organisms. That are in
physical contact with each other and they
provide mutual benefit to each other.This is
called symbiotic relation ship.Few examples
are:-
• Some fungi live in roots of trees.
• Lichens
• Leguminous plants With rhizobium bacteria.

11. SYMBIOTIC RELATIONSHIP
• Lichens: In Lichens a
chlorophyll containing
partner Which is an Alga,
and a fungus live together.
The fungus provides shelter
water and minerals to the
alga and in return alga
provides food which it
prepare by the process of
photosynthesis.

12. Leguminous plants.
• The bacterium called rhizobium
can take atmospheric nitrogen
and convert it into soluble
form. But rhizobium cannot
make its own food so it lives in
a roots of Leguminous plants
(gram, peas,moong,beans etc)
and provides them with
nitrogen. In return the plants
provide food and shelter to the
bacteria. They thus have a
symbiotic relationship.

13. Check your Knowledge
 GUESS WHO AM I???
 (i) I am a plant without chlorophyll and yellow
in colour.
 (ii) I can do photosynthesis but love to eat
insect.
 (iii) I am a slimy green patches in ponds.
 (iv) Found in leguminous plants root help in
nitrogen fixation.
 (v) Name the association between algae and
fungi.
 Write the essential conditions for fungi to grow.