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A photosynthesis chamber is a transparent airtight enclosure that is used along with a gas exchange system and sensing devices to measure plant functions, such as photosynthetic respiration, stomatal ... conductance, canopy resistance, and leaf photosynthetic rate, especially in response to changes in light and carbon dioxide concentrations. Photosynthesis chambers can be equipped with environmental control equipment (which allow researchers to vary such things as light, temperature, relative humidity, and gas concentrations).

Photosynthesis chambers provide a controlled environment that supports the study of leaf and plant functions. The specific objectives of a photosynthesis chamber vary according to the needs of the particular study.

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