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What is photosynthesis, meaning of photosynthesis (About photosynthesis meaning in hindi)

प्रकाशसंश्लेषण का अर्थ (About photosynthesis meaning in hindi)

the process by which plants The basic process that we prepare our food is called photosynthesis. in all green plants chlorophyll Which has the ability to absorb sunlight. Simple inorganic photosynthesis with the help of sunlight energy Molecules – Carbon dioxide (CO2) and water (H2O) In plant cells, the fixation takes place in the organic molecule glucose (carbohydrate).

Plants not only produce glucose through this process, they also fix the radiation energy of sunlight into chemical energy, which is stored in glucose molecules.

We express the process of complete photosynthesis by the following chemical equation.

6CO2 + 12H2O——-sunlight and clorofil–> C6H12O6 + 6O2 + 6H2O

It is clear from the above equation that in this process Oxygen by-product which is released into the atmosphere by plants.

Location of photosynthesis (About photosynthesis in hindi)

The process of photosynthesis takes place in the chloroplast from beginning to end. of leaves Palisade and spongy parenchyma Contains many chloroplasts. Both the composition and function of these particles are very complex.

Chlorophyll pigments are found in chloroplasts. Since they are mostly found in the leaves of plants, hence the leaves are called photosynthetic organs and call green Photosynthetic organelles.(photosynthetic organelles) it is said.

The stomata or stomata are present in the epidermis or epidermis of the leaves. These are specialized cells with a hole in the middle. These holes can be closed and opened and whose control door cells or guard cells happens by. Through these stomata, the air containing CO2 from the atmosphere enters the cells within the leaves. Diffusion reaches by.

The opening and closing of stomata depends on the turgidity of the gate cells. When the gate cells swell after absorbing water, the stomata opens. Conversely, when the gate cells lose their water and shrink, the stomata closes.

Materials required for photosynthesis-process

Four substances are required for photosynthesis-

  1. foliar or chlorophyll,
  2. Carbon dioxide,
  3. Water
  4. Sun-light.

1.Foliar or Chlorophyll-

We know that photosynthesis takes place only in green plants. However, the plant does not actually have to be green, as photosynthesis occurs in both red and brown plants, such as some sea grasses or other plants. Therefore, the color of the plant is not as important in the process of photosynthesis as the presence of the green pigment chlorophyll or chlorophyll inside the plant cells.

ThereforePhotosynthesis-process(photosynthesis) Possible only in the presence of chlorophyll. Since chlorophyll is the actual molecule by which the process of photosynthesis takes place, chlorophyll molecules are called photosynthetic units.


In photosynthesis, plants take in carbon dioxide and release oxygen. Plants obtain this essential CO from their environment. The largest reservoir of CO2 is the atmosphere. but, Atmosphere Apart from this, other gases are present in different quantities.

Normally, 0.03% of CO2 is present in the atmosphere, that is, 3 parts CO2 out of 10,000 parts. Apart from this, CO2 is released into the atmosphere by burning of wood, coal, fuels, decomposition by bacteria, respiration etc.


Plants get most of their food from water and they grow because of water, it is an essential component for photosynthesis. It is difficult to show the essentiality of water with a single simple experiment.

Plants die if they do not get water regularly, but it can also happen due to other reasons. That is why farmers regularly irrigate the crops in their fields. This is because water is regularly available to plants for the necessary photosynthesis. Plants absorb water from the soil as well as dissolved mineral salts (compounds of nitrogen, phosphorous, calcium, magnesium, iron etc.) through their roots.

Proteins and other compounds are synthesized from nitrogen. The water taken up by the roots reaches the different parts of plants and leaves through the xylem tissues where it is used in the process of photosynthesis.

Aquatic plants absorb water and salts easily from their exterior.


It was proved by experiment that green plants purify carbon dioxide only in sunlight. The process of photosynthesis cannot take place in the dark; Because sunlight itself provides the necessary energy for this process. The only chlorophyll present in green leaves found in green plants is present in sunlight. solar energy or Radiant energy can trap or degrade and convert it into chemical energy and incorporate it into the synthesized glucose molecules.

How does photosynthesis happen?

In the complex process of photosynthesis, green plants convert radiation energy into chemical energy. When sunlight falls on green leaves, chlorophyll absorbs radiation energy and by this energy the water present in green leaves splits into two parts, i.e. hydrogen and oxygen. Oxygen is released through the stomata and enters the atmosphere.

Hydrogen combines with carbon dioxide to form glucose. Light is not required in the complete process of photosynthesis, but light is used to split water. photolysis of water essential for. this first step of photosynthesis light reaction it is said.

subsequent reaction in which products of light reaction It is used in the reduction of Co2, and as a result of which glucose is formed, light and dark remain equally. Photosynthesis(about photosynthesis meaning in hindi)this second phase of dark reaction it is said.

This step is not called a non-photonic reaction because it takes place in darkness or the absence of light is necessary, but the presence or absence of light has no effect on it.

this article”What is photosynthesis, meaning of photosynthesis (About photosynthesis meaning in hindi)) “Thank you very much for reading. That you must have got to know a lot new from this article.

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