Stomatal Responses of Bean (Phaseolus Vulgaris L.) Leaves to Changing Irradiance, Air Humidity, and Water Potential of Root Medium

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“…Along with solar radiation intensity and the effects during the light phase of photosynthesis, as well as CO2 concentration and its assimilation processes, the air humidity and soil water availability are the basic factors determining the intensity of stomata conductivity of leaves (Maleszewski et al 2003). In response to a decrease in humidity in the air, stomata of plants close up (Maleszewski et al 1999), limiting the absorption of ozone inside the plants and increasing its concentration at the earth's surface. The absorption of ozone by plants through stomata is the main mechanism for ozone removal through dry deposition by mature plants, alongside other mechanisms such as ozone deposition on soil or plant leaves, that can play an important role in some ecosystems.…”