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Science > Respiration in Organism > Respiration in Plants
Respiration in Organism

Respiration in Plants

Humans breathe, animals breathe, but do plants also breathe? Yes! Of course, plants breathe as well. We may not be able to see the process of respiration in plants, but it is happening. Let study below about respiration in plants.

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Respiration in Plants

Plants like other animals also respire. Plants also need energy. The plants get energy through the process of respiration in which glucose food breaks down in the presence of oxygen to form carbon dioxide and water with the release of energy.

This energy is used by the plant for carrying out its various life processes. Thus, Like other organisms, plants also respire for their survival. The respiration in plants differs from that of animals. In other words, in plants, each part can independently take in oxygen from air, utilize it to obtain energy, and give out carbon dioxide.

Browse more Topics under Respiration In Organism

Learn more about Respiration in Animals here.

Respiration In Leaves

The leaves of plants have tiny pores on their surface which are called stomata. The exchange of gases in the leaves during respiration takes place through stomata.

This happens as follows: Oxygen from the air enters into a leaf through stomata and reaches all the cells by the process of diffusion. This oxygen is used in respiration in cells of the leaf. The carbon dioxide produced during diffuses out from the leaf into the air through same stomata.

Respiration in Plants

The photosynthesis reaction makes glucose and the respiration reaction break it down. In photosynthesis, the energy which goes into the reaction is light energy. In respiration, the energy which comes out is chemical energy.

Respiration in Plants

Respiration in Roots

The roots of plants are under the ground but root cells also need oxygen to carry out respiration and release energy for their own use.

How Does Respiration Occur in Roots?

The roots of a plant take up air from the spaces between the soil particles.  Root hairs are in contact with the air in the soil particles. Oxygen from the air in soil particles diffuse into root hair and reach all the cells of the root where it is utilised in respiration. Carbon dioxide produced in the cells of the root during respiration goes out through the same root hair by the process of diffusion.

Respiration in Plants

If a potted plant is over watered for a long time, then the plant may ultimately die. This is because too much water expels all the air from in between the soil particles. Due to this, oxygen is not available to the roots for aerobic respiration. In this condition, the roots of plant respire anaerobically producing alcohol. This may kill the plant. Germinating seeds during early stage respire anaerobically because they have seed coat which does not allow the oxygen to enter through it.

Respiration in plants happens throughout the day and night thereby carbon dioxide is produced. However, during the daytime, the amount of carbon dioxide released is negligible compared to the amount of oxygen produced as a result of photosynthesis. Hence, one should not sleep under a tree at night.

Learn more about Respiration and its types.

Question For You

Q1. From where do roots absorb air needed for respiration?

Ans: Root hairs

Q2. Name the tiny pores on the surface of leaves of a plant through which gas exchange occurs.

Ans: Stomata

Q3. Name any two parts of the plant through which exchange of gases takes place during respiration.

Ans: Roots and Leaves.

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