Do Plants Breathe 10, Do Plants Breathe

Both humans and animals need to breathe, and plants need to breathe day and night. The difference is that the plant does not have obvious respiratory organs, but every cell of its parts—roots, stems, leaves, flowers, fruits, and seeds—is respiring. There is a rod-shaped or granular mitochondria in the cell, which is specialized in respiration, so plants can also breathe.

The process by which plants oxidize organic compounds under aerobic conditions to produce CO2 and water. The chemical reaction formula (taking carbohydrates as an example) is:

c6h12o6+6o2→6co2+6h2o+2821kj

The energy produced in this process can be partially used for various life activities. When the oxygen supply of plant tissues is insufficient or anaerobic, the organic matter in it can be partially decomposed, producing a small amount of CO2 and releasing a small amount of energy. This is fermentation, sometimes referred to as anaerobic respiration.

In contrast, respiration when oxygen is sufficient** is also known as aerobic respiration. The green part of the three-carbon plant, with glycolic acid, the oxidation product of ribulose diphosphate, as a substrate under light, continues to oxidize to produce CO2, a process called photorespiration.

Although plants rely on photosynthesis to provide energy to form organic matter, the non-green part (and the green part in the dark) is through respiration, the chemical energy in the photosynthetic products is released, in the form of high-energy bonds in ATP for various physiological activities, its basic reaction is similar to that of animals and microorganisms, and electron transport and phosphorylation are also carried out on the ** chondria. It is different from higher animals in that the leaves of plants are flat and thin, there are many stomata, and the gas exchange with the atmosphere is convenient, except for swamp plants such as rice, which have aeration tissues, there are no respiratory organs such as lung gills.

The rate of respiration varies depending on the plant species, the period of development, and the physiological state. Young, vigorous tissues have a high respiration rate, and mature and aging tissues have a low respiration rate. The most significant environmental factors affecting the respiration rate are temperature, atmospheric composition, moisture, and light.

Respiration is essential for the normal life and yield formation of plants. Especially in low-lying waterlogged areas, the lack of oxygen in the soil obstructs the respiration of the root system, which affects the growth of the root system and the absorption of water and inorganic ions. Controlling the water content is often used to reduce the respiration rate of the seeds.

For fresh fruits and vegetables, the respiration rate can be reduced by using modified atmosphere storage methods that reduce O2 concentration (to 3%) and increase CO2 concentration (to 5%).

The photosynthesis and respiration of plants are in respiration, a cycle of morning and evening.

Yes, it is divided into aerobic respiration and anaerobic respiration.