Water lost through stomatal transpiration is replaced by water from xylem vessels in the leaf, driven by the suction created through evaporation from leaf cells.
What replaces the water lost through stomatal transpiration in plants, and how does this replacement occur?
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Plants replace water lost through stomatal transpiration via a process called root uptake. Water is absorbed by plant roots from the soil, facilitated by osmosis and root pressure. Root hairs increase the surface area for absorption. The plant’s vascular system then transports water upward through xylem vessels, driven by transpirational pull created by evaporation from stomata. This continuous flow, known as the transpiration stream, ensures a steady water supply to leaves. Additionally, plants minimize water loss by regulating stomatal aperture. This dynamic balance of transpiration and root uptake maintains plant hydration, supporting vital physiological processes and nutrient transport.