The Respiratory Secrets of Plant Roots
To prove that plant roots breathe, scientists are conducting a series of laboratory and field studies aimed at measuring gas exchange in the soil. Measuring the consumption of oxygen and the release of carbon dioxide by the root system provides direct evidence of root respiration. In laboratory conditions, special setups are used to determine that roots actively absorb oxygen from the soil and, conversely, release carbon dioxide. Similar measurements are carried out in field experiments, where variations in oxygen exchange at different soil depths are studied even under low temperatures.For example, the authors of one study note: "Plant roots absorb oxygen from the soil and release carbon dioxide, which is also proven by the results of laboratory research and field experiments." (source: link txt)Similar data are confirmed by other studies, indicating that in the process of respiration, roots not only consume oxygen but also actively release carbon dioxide, significantly affecting soil gas exchange: "In the process of respiration, plant roots also release carbon dioxide, which significantly affects soil gas exchange. This study showed that roots not only absorb oxygen but also, in the reverse process, separate carbon dioxide." (source: link txt)Moreover, measurements of "oxygen consumption" are recorded even under unfavorable climatic conditions, demonstrating the steady respiratory activity of roots. One study emphasizes: "During the cold season, plant roots continue to breathe actively. Research shows significant oxygen absorption at different soil depths." (source: link txt)Thus, the evidence of the respiratory activity of plant roots is based on a systematic approach, where special measurements and analytical methods record active gas exchange in the root zone. This allows for the determination that roots are involved in a complex cycle of gas exchange, ensuring not only the viability of the entire plant system but also influencing biological processes in the soil.Supporting citation(s):"Plant roots absorb oxygen from the soil and release carbon dioxide, which is also proven by the results of laboratory research and field experiments." (source: link txt) "In the process of respiration, plant roots also release carbon dioxide, which significantly affects soil gas exchange. This study showed that roots not only absorb oxygen but also, in the reverse process, separate carbon dioxide." (source: link txt) "During the cold season, plant roots continue to breathe actively. Research shows significant oxygen absorption at different soil depths." (source: link txt)