• Written By Sumana_C
  • Last Modified 25-01-2023

Types of Autotrophic Nutrition: Detailed Explanation


Types of Autotrophic Nutrition: Students who want to know the kinds of Autotrophic Nutrition must first examine the definition of nutrition to comprehend autotrophic nutrition. Consuming and utilising food is the process of nutrition. The organism uses the food it has gathered to fuel its many metabolic processes during this process. The most common source of energy in food, an organic substance, is carbohydrate. Proteins and fats are also components of food. The most fundamental carbohydrate food is glucose, which is a simple sugar. Glucose is also used to make starch, a more complex meal.

Now that we have clarified what autotrophic nourishment is, let’s move on to the next segment. Let us understand it simply. We can break the word into auto = oneself and trophic = nourishment. This word’s precise definition is “self-nutrition.” When an organism uses autotrophic feeding, it creates its own food in the presence of light from uncomplicated inorganic substances like water, carbon dioxide, and mineral salts. Autotrophic nutrition is the mode of nourishment found in all green plants.

The source of nutrition in plants is covered in the article, which includes a description of what autotrophic nutrition means. The page also includes a basic explanation of photosynthesis and the many forms of autotrophic nutrition.

We can consider plants such as blue-green algae and cyanobacteria as some examples of autotrophic nutrition.

What are the Modes of Nutrition?

Autotrophic nutrition and heterotrophic nutrition are the two basic types of nutrition. Autotrophs are creatures that operate in the autotrophic mode. The term “heterotroph” refers to an organism that uses a heterotrophic form of nourishment. The key difference between these two approaches is the ability to create organic compounds from inorganic sources, including energy-rich molecules. As was already established, autotrophs cannot manufacture their food from inorganic sources like water, carbon dioxide, sunshine, hydrogen sulphide, etc., but autotrophs can. Additional categories for the autotrophic are

  • Photosynthetic autotrophs
  • Chemosynthetic autotrophs

Photosynthetic Autotrophs

Autotrophs are plants that can manufacture their own sustenance. Photosynthesis is the process through which plants make their own food. Most photosynthesis takes place in the plant’s leaves, also referred to as the “kitchen of the plant.” In some instances, photosynthesis may even be possible in the stems. Starch is produced through photosynthesis, converting solar energy into chemical energy. To accomplish photosynthesis, different components of a plant perform various roles.

The food factories of the plant are the leaves.

The stomata, which are found in the lower epidermis of the leaf and consume carbon dioxide (CO2) from the atmosphere, are present.

Roots: They draw water and minerals from the earth and transport them to various areas of the plant.

Some bacteria are classified as autotrophic microorganisms in addition to plants. Notably, these bacteria do not produce oxygen as a byproduct of their metabolic process, which distinguishes them from plants. It’s mostly because such bacteria don’t employ chemical substances like hydrogen sulphide as their electron donor; instead, they use water.

Chemoautotrophic Nutrition

The organism does not require sunshine because it can produce its own food using chemical energy. Chemical energy is created when chemical compounds, whether organic or inorganic, are oxidised. The recycling of nutrients like nitrogen, phosphorus, iron, and sulphur depends on chemosynthetic bacteria. Examples are methanomonas, sulphur, Nitrosomonas, hydrogen, and nitrifying bacteria.

Plants and Their Nutrition Requirements

Plants are among the living creatures that require energy in some way. They have tissues and cells, and they increase in size and girth as well. They are responsible for creating the ecosystem. So they do need nutrients to produce food. Of course, different organisms have different nutrient needs. The autotrophic mode of nutrition is referred to as this sort of nutrition in plants. What exactly does this stand for? It indicates that plants have the unique capacity to produce food independently, using inexpensive inorganic materials to gather organic materials. They derive their energy from inanimate objects like carbon dioxide and the sun.

The substance that gives plants their distinctive green colour is called chlorophyll. Plants are able to produce simple carbohydrates with the assistance of the aforementioned components. The plant uses the carbohydrates created in this way to fuel itself. Plants store extra carbohydrates as a reserve for use at a later time when there is a surplus.

Factors Affecting Photosynthesis Process

Some crucial factors promote or inhibit photosynthesis depending on their concentration:

  • Light
  • Oxygen
  • Temperature
  • CO₂

Purpose of Photosynthesis

Photosynthesis aids in the production of glucose to complete other tasks, including the movement of water and nutrients throughout the plant and respiration. Plants need the energy to produce more biological and biochemical processes that allow them to reproduce. Plants provide food for other living things.

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