NUTRITION IN PLANTS
Class -VII
Presented by
Mrs. Saishri V. Sastri
PRT(Science)
Middle School resources – Science

Index
1. Introduction
2. Warm up Video
3. Mode of nutrition
4. Autotrophic nutrition
5. Photosynthesis
6. Heterotrophic Nutrition
7. Insectivorous plants
8. Symbiosis
9. Saprophytic Plants
10. Parasitic Plants
11. Replenishment of Nutrients in soil
12. Practice exercises
Middle school resourses.

Introduction
LIFE PROCESSES:
• The basic functions such as breathing, transport etc. performed by living organism .
• One of the them is Nutrition .
• Nutrition L. nutire = food, nourish
• Definition – The process of intake of food and its proper utilization in the body is called
NUTRITION.
DEPT.

Warm up video

Mode of Nutrition
Broadly, there are two types or mode of nutrition among living organisms .
MIDDLE SCHOOL
Mode of Nutrition
Autotrophic Nutrition Heterotrophic Nutrition
Insectivorous plant Symbiotic Nutrition Saprophytic Nutrition Parasitic Nutrition

Autotrophic Nutrition in plants
DEPT.

Photosynthesis
Photosynthesis is food making process in plants from simple substances like carbon dioxide
and water in the presence of sunlight.
.

Heterotrophic mode of nutrition
• Heterotrophic nutrition is a type of nutrition in which organisms depend upon other
organisms for food to survive.
• Heterotrophic organisms have to take in all the organic substances they need to survive.
• Since these organisms depend on other organisms for their food, they are called consumers.
• All animals and non-green plants like fungi come under this category.
• Examples – cow, fungi , lichen, etc.
DEPT.

Insectivorous plants
DEPT.
1-Identify the picture.
2-Why this is famous?
Plants those eat insects to fulfil Nitrogen requirements are
known as insectivorous plants.
*They are also known as carnivorous plants.
*They usually found in marshy areas .
* Examples -
Pitcher plants , Venus flytrap .
It is an insectivorous plant pitcher plant.

Pitcher Plant- Structure
• 1- Pitcher plants have cup or picher like structure with lid.
Pitcher - cups are modified leves.
• 2-The inside of the pitcher plants are lined with downward
small hair, which do not allow insect to climb back .
• 3-Insects are attracted to pitcher by their scents or colour.
• 4- when they enter inside ,the lids closes.
•
• 5- They slided down the walls and drown into the digestive
juices at the bottom , which dissolve the insect.

Symbiosis
• In this mode of nutrition there is a close association between two different plants of
different categories
• In such type of association both the plants get benefited.
Synthesis of protein in leguminous plants
DEPT.
Figure : Lichen Figure: Root nodules

Saprophytic Nutrition
Middle School Resources
• Mode of nutrition in which organisms or plants that obtain their nutrition from dead and decaying organic
matter is called Saprophytic mode of nutrition .
• The plants which exhibit saprotrophic mode of nutrition are called as saprotrophs.
• Saprotrophs secrete digestive juices onto dead and decaying matter to dissolve it and then absorb nutrients
from it.
• Examples of saprotrophs are - mushrooms, mounds, yeasts and some bacteria.

• In parasitic mode of nutrition, plants depend on other plants or animals for their
nourishment.
• Such dependent plants are called as parasites and the ones on which parasites depend are
called as hosts.
• A parasite plant climbs on the host plant from which they get all the food.
• The host does not get any benefit from the parasite.
• Some examples of parasites are Cuscuta (akash-bel), Cassytha (amar-bel), hookworms,
tapeworms, leeches, etc.
DEPT.
Parasitic Plants

Replenishment of Nutrients in soil
• Growing leguminous plant.
• Saprophyte
• Crop rotation .
• Adding of manure and fertilizer .
DEPT.

Practice Excercises
Q-1-Answer the following questions.
a. Differentiate between autotrophic and heterotrophic mode of nutrition .
b. Why cannot our body make good from carbon dioxide and water ?
c. Draw a well labelled diagram of stomata.
Q-2Complete the flow chart-
DEPT.

Practice Excercises
A- Match the following. B- label the parts of the pitcher Plant
DEPT.

Middle School Resource