Its a simple ppt on mode of nutrition in plants

1. Nutrition in Plants
CLASS IV

2. Nutrition in Plants
 The components of food which are necessary for
our body are called nutrients
 All living organisms require food.
 Only green plants can make their food
themselves. All other plants and animals including
human beings are dependent on plants for their
food.

3. Modes of Nutrition in Plants
PLANTS
AUTOTROPHIC
HETEROTROPHIC
PARASITIC SAPROTROPHIC
SYMBIOTIC
INSECTIVOROUS PLANTS

4. Autotrophic Mode of Nutrition
 Green plants can make their own food with the
help of Carbon dioxide, Water, Sunlight and
Chlorophyll. The process is called
PHOTOSYNTHESIS.
 Leaves are the food factories of plants. Water
and minerals present in the soil are absorbed by
the roots and transported to the leaves.

5.  CO2 from air is taken through the tiny pores
present on the surface of leaves. They are called
STOMATA. Stomata is surrounded by “Guard
cells”.
 The leaves have a green pigment called
Chlorophyll. It helps leaves to capture the
energy of the Sunlight. The energy is used to
synthesize food.

6.  So, we can say that SUN is the ultimate source
of energy for all living things.
 The leaves other than green also have
chlorophyll. The large amount of red, brown
and other pigments mask the green colour.

7. STOMATA

8. STOMATA

9. STOMATA

10. Heterotrophic Mode of Nutrition
1.PARASITIC PLANTS
 The mode of nutrition where an organism absorb food
from other growing green plant (called the host) is
called Parasitic.
 Parasitic plants develop special roots called
HAUSTORIA which penetrate into the tissues of the
host plant.
e.g. CUSCUTA (DODDER), MISTLETOES and
APODANTHES.
 Parasitic plants do cause harm to the host plant.

11. MISTLETOES

12. MISTLETOES

13. CASCUTA

14. INSECTIVOROUS PLANTS
 They are the plants that derive some or most of
its nutrients by trapping and consuming animals,
mainly insects.
e.g. PITCHER PLANT

15. PITCHER PLANT
The pitcher like structure is the modified part of
the leaf. The apex of the leaf forms a lid which
can open and close the mouth of the pitcher.
Inside the pitcher there are hair which are
directed downwards. When an insects land in
the pitcher, the lid closes and the trapped insect
gets entangled into the hair. The insect is
digested by the digestive juices secreted in the
pitcher.

16. Tropical Pitcher Plant

17. Western Australian Pitcher Plant

18. PITCHER PLANT

19. Sun Pitcher

20. Pitcher Plant

21. CALIFORNIA PITCHER PLANT
(COBRA LILY)

22. Traps work in a variety of ways.
Pitfall traps of pitcher plants are leaves folded into deep, slippery
pools filled with digestive enzymes.
Flypaper (or sticky or adhesive traps) of sundews and butterworts
are leaves covered in stalked glands that exude sticky mucilage.
Snap traps (or steel traps) of the Venus flytrap and waterwheel
plant are hinged leaves that snap shut when trigger hairs are
touched.
Suction traps, unique to bladderworts, are highly modified leaves
in the shape of a bladder with a hinged door lined with trigger
hairs.
Lobster-pot traps of corkscrew plants are twisted tubular channels
lined with hairs and glands.

23. VENUS FLY TRAP
 The trap of the Venus fly trap is highly modified
leaf. On the inner surface, there are short, stiff
hair called trigger or sensitive hair. When
anything touches these hair enough to bend
them, the two lobes of the leaves snap shut in
less than a second.

24. Venus Flytrap

25. Venus Flytrap (Dionaea muscipula)

26. Venus Flytrap (Dionaea muscipula)

27. Venus Flytrap With Fly

28. Drosera Anglica

29. Wilson Wong Pitcher Plant

31. SAPROTROPHS
 In this mode of nutrition, organism take in
nutrients in the solution form from dead and
decaying matter.
e.g. Mushroom, Bread moulds, Indian Pipe.

33. symbiotic relationship
 Some plants live with other plants and share
their food resources. Both the types mutually
gain from each other. Such a relation is called
Symbiotic.

34.  LICHENS are an association between a fungus
and a green algea.
 The fungus obtains nutrients from the algea, and
the fungal tissue in turn provides shelter for the
algea, allowing it to grow in harsh conditions
such as rock surfaces where it would otherwise
be destroyed.

35. LICHENS

36. LICHENS

37. LICHENS

38. LICHENS

39.  Certain plants such as peas have a Symbiotic
association with bacteria such as Rhizobium.
Rhizobium coverts atmospheric nitrogen into
plant usable forms e.g. ammonia. The plant in
turn provide nutrients for the bacterium growth.

40. RHIZOBIUM

41. RHIZOBIUM

42. RHIZOBIUM