Nutrition in plants

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DIGI SCHOOL LIVE

NUTRITION IN PLANTS:

NUTRITION IN PLANTS Grade 7

Learning objectives :

Learning objectives At the end of the lesson, the students will be able to Define nutrition and list out its importance. Distinguish between autotrophic and heterotrophic nutrition. Define the terms herbivorous, carnivorous, omnivorous, autotrophs , and heterotrophs . Understand differences between saprophytes and parasites. Explain the phenomenon of symbiosis in lichens.

PowerPoint Presentation:

The process by which living organisms take in food and use it to obtain energy for growth and development is called nutrition.

Types of nutrition :

Types of nutrition Nutrition in which organisms make its own food from simple inorganic substances Nutrition in which organisms cannot make its own food . Examples: Green plants Green plants prepare their food by a process called photosynthesis Examples: Non green plants, Animals Organisms involved in autotrophic nutrition are called autotrophs Organisms involved in heterotrophic nutrition are called heterotrophs Autotrophic Nutrition Heterotrophic Nutrition

Conditions necessary for Photosynthesis:

Conditions necessary for Photosynthesis Green plants need the following things to prepare their own food: Chlorophyll Water Carbon dioxide Sunlight Click on each to know more

Conditions necessary for Photosynthesis:

Conditions necessary for Photosynthesis Green plants need the following things to prepare their own food: Chlorophyll Water Carbon dioxide Sunlight Click on each to know more Click here to go to next

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Water is necessary for photosynthesis 6 CO 2 + 12 H 2 O C 6 H 12 O 6 + 6 O 2 + 6 H 2 O 1. Decrease of water decreases the rate of photosynthesis 2. Only a small portion of water is used for photosynthesis and rest is lost through transpiration Click here to go back

Types of Heterotrophs :

Types of Heterotrophs Herbivorous animals Carnivorous animals Omnivorous animals

Nutrition in non-green plants :

Nutrition in non-green plants Parasitic plants Plants or animals which live in/on other living organisms and derive their food from them are called parasites. Saprophytic plants Plants which live on dead or decaying organic matter and derive their food from it are called saprophytes. Carnivorous plants Plants which feeds on other organisms are called carnivorous plants. Symbiotic plants Plants which are in partnership for mutual benefit.

Parasitic plant:

Parasitic plant Dodder derives its food from the host plant through haustoria and has no need for leaves or chlorophyll. Dodder is a plant parasite which attaches itself to a plant (host) and loses its root system. Dodder is a plant parasite which produces special sucking roots called haustoria . There are many varieties of dodder that causes weed problem in horticulture.

Saprophytic plants:

Saprophytic plants They release enzymes and break down complex organic matter into simpler forms Fungi and bacteria are examples of saprophytic plants. These plants live on dead and decaying organic matter and derive their food from it. These digested food is then absorbed by the saprophytic plants

Carnivorous plants:

Carnivorous plants Some examples of insectivorous plants are : Pitcher plant, Venus fly trap, Utricularia Some plants also take in their food just like animals. They are also called as insectivorous plants. They have special methods to capture their food. In pitcher plant , the leaf is modified to form pitcher like structure to trap insects.

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Symbiotic plants Symbiosis or mutualism is a partnership between tw o organisms in which both partners get benefited from each other.

Symbiotic Relations :

Symbiotic Relations The cattle egret will eat insects that have been disturbed when the cattle forage. The dogs supply protection and companionship and the humans provide food and shelter. The shrimp digs a burrow into the sand and both organisms live there. Because the shrimp is almost blind, the goby fish will touch the shrimp when a predator is near.

Replenishment of nutrient in the soil:

Replenishment of nutrient in the soil By Applying Fertilizers By adding cattle dung manure By adding compost By growing leguminous crops

Summary :

Summary All living organisms need food to get energy for growth and development. Green plants prepare their food by the process called photosynthesis. There are two types of main types of nutrition – autotrophic and heterotrophic. Green plants prepare their food by the process called photosynthesis. Non green plants are either saprophytes, parasites or insectivores Nutrients in the soil can be replenished by adding manures, compost and fertilizers

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