Stomata regulate the loss of water by transpiration A. Plants have evolved adaptations that balance water loss with CO2 uptake.

Question

Stomata regulate the loss of water by transpiration
A. Plants have evolved adaptations that balance water loss with CO2 uptake.
1. Three environmental conditions have major effects on the rate of transpiration: relative
humidity, air temperature, and air movement. Relative humidity when low speeds
evaporation. The air temperature also speeds evaporation as it rises. Air movement at the
leaf surface carries water vapor away from the surface and so makes a steeper gradient.
About 2% of the water remaining in the leaf is used in photosynthesis and other activities.
This emphasizes the need for controls over transpiration.
The cuticle-covered
of leaves and stems reduces the rate of water
loss, but it also limits the rate CO₂ can diffuse into the leaf. The functioning of stomata
affects a plant's water balance and CO2 uptake. This "transpiration-photosynthesis
compromise" involves the regulation of transpiration and gas exchange by opening and
closing stomata.

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