It carries moisture from root to parts of the plant
Transpiration is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere. Transpiration is essentially evaporation of water from plant leaves. Transpiration also includes a process called guttation, which is the loss of water in liquid form from the uninjured leaf or stem of the plant, principally through water stomata. Studies have revealed that about 10 percent of the moisture found in the atmosphere is released by plants through transpiration. Transpiration is the loss of water from plants in the form of vapor (evaporation). Plants utilize most of the water absorbed from the soil for transpiration (95%), but a small portion of the water absorbed is used during photosynthesis for producing the carbohydrates necessary for plant growth (5%). Transpiration and plant leaves. Plants put down roots into the soil to draw water and nutrients up into the stems and leaves. Some of this water is returned to the air by transpiration (when combined with evaporation, the total process is known as evapotranspiration). PLANT PARAMETERS – These plant parameters help plants control rates of transpiration by serving as forms of resistance to water movement out of the plant. Stomata – Stomata are pores in the leaf that allow gas exchange where water vapor leaves the plant and carbon dioxide enters. In transpiration, water travels from the soil into the roots of plants, and up to the underside of plant leaves, where it is released into the air. This evaporation of water from plants into the atmosphere happens thanks to small pores in the leaves called stomates. Transpiration is the process of water loss from plants through stomata. Stomata are small openings found on the underside of leaves that are connected to vascular plant tissues. In most plants, transpiration is a passive process largely controlled by the humidity of the atmospheric and the moisture content of the soil. Transpiration. Water in the roots is pulled through the plant by transpiration (loss of water vapor through the stomata of the leaves). Transpiration uses about 90% of the water that enters the plant.
http://water.usgs.gov/edu/watercycletranspiration.html http://www.clemson.edu/extension/horticulture/nursery/irrigation/why_plants_need_water.html http://water.usgs.gov/edu/watercycletranspiration.html http://passel.unl.edu/pages/informationmodule.php?idinformationmodule=1092853841&topicorder=6 http://academic.evergreen.edu/c/clejen03/Transpiration.html http://academic.evergreen.edu/c/clejen03/Transpiration.html http://www.ext.colostate.edu/mg/gardennotes/141.html
what does transpiration do for a plant