Autotrophic Nutrition
         
         When organisms make their food from simple inorganic substances like H2O and CO2, than it is called Autotrophic Nutrition. Such organisms are called Autotrophs.
         All Green plants are Autotrophs or Producers because they make their own food by the process of photosynthesis.
(i)     Photoautotrophs : Those which utilize sunlight for preparing their food. e.g. plants, algae, purple red and green bacteria.  
(ii)     Chemoautotrophs : Those which utilize chemical energy for preparing their food. e.g. Nitrifying bacteria, iron bacteria, sulphur bacteria, methane bacteria.  
 

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Chapter 1: Nutrition in Plants

Mode of Nutrition In Plants

All the living organism plants and animals require food. The organism need to take food obtain energy and to obtain minerals for growth and to obtain mineral for the repair of damage part of the body .The process of taking food by an organism as well as the utilisation of this food by the organism is called nutrition. Plants can make their own food but animals cannot make the food themselves. They obtain food from plants or other animals that eat plants thus, the human beings and animals depend on plants for their food ,directly or indirectly .

Modes of Nutrition in plants

The method of obtaining food are called modes of Nutrition .On the basis of their modes of Nutrition all the organism can be divided into two main groups.( Autotrophs and Heterotrophs)

Autotrophs – Those organism which can make food themselves from simple substance like carbon dioxide and water by the process of photosynthesis are called autotrophs.

Heterotrophs- Those organism which cannot make food themselves by the process of photosynthesis and take food from green plants or animals are called heterotrophs.