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Plant respiration

Main vital functions in plant organisms

The main functions that allow plants to live are respiration, photosynthesis, transpiration and guttation. Photosynthesis transforms light into chemical energy, producing substances called carbohydrates. Respiration represents a complementary process to that of photosynthesis as it is through it that the energy contained in carbohydrates is released and can be used by the plant organism to develop.While with photosynthesis plants take on carbon dioxide and release oxygen, with breathing, oxygen is absorbed and carbon dioxide is expelled. Plants absorb water from the soil and retain nutrients from it, then releasing it through transpiration. If transpiration is not possible, the plants expel the


The respiration of plants, like that of animals, is a very important function that produces the energy necessary for life. For most living beings this process occurs by absorbing oxygen from the environment (aerobiosis). Specifically, plant organisms absorb oxygen and at the same time expel waste substances. The respiratory process of plants is similar to that of animals: absorption of oxygen and emission of carbon dioxide. In simpler plant organisms, oxygen is absorbed directly through the cells, gradually passing from the external to the internal ones. In more complex plants, on the other hand, it passes through the intercellular spaces (apoplasts), and is then absorbed by the single cells in contact with these spaces.

The stomata of the leaves: characteristics and functions


The stomata are particular openings on the underside of the leaves that allow the gaseous exchange between the plant and the external environment.They are used by the plant to absorb carbon dioxide during photosynthesis, but also to obtain from the outside the necessary oxygen during breathing. The stomata also have the function of releasing water vapor during transpiration. Each stoma is made up of two crescent-shaped “guard” cells, which change according to the needs of the plant by opening and closing the stoma. that there are plants that live under water (such as algae), which are able, thanks to particular mechanisms, to take the oxygen necessary for their needs from the water, for example through pneumatophore aerial roots.

Plant respiration – aerobic and anaerobic life


Some plants manage to survive even without oxygen (anaerobic life) but not for long, in fact, in the absence of this element, not enough energy is produced for fundamental processes for plant life, such as cell division or the absorption of electrolytes. of plants is generally more intense the younger they are, as they need the energy necessary to develop, after which when the plant has reached an age that can be considered adult, the intensity of respiration tends to decrease and stabilize within certain parameters. Ultimately, in order for the plant to be able to properly perform its vital functions and develop it is necessary that it has the right amount of oxygen available otherwise it would perish,

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