Origin of transpiration
Examples from the Web for transpiration
We must expressly declare against sowing kitchen-plants on vine-furrows, as by their transpiration they hurt the vine.Buffon's Natural History. Volume X (of 10)|Georges Louis Leclerc de Buffon
M. Leclerc has very carefully examined this question, and he concludes that transpiration is only the simple evaporation of water.
They secrete an oily, unctuous substance, which mixes with the transpiration, and lubricates the skin.
His book begins with the research for which he is best known, namely that on transpiration.
And, although an elevated temperature be favourable to transpiration, its modifying influence is less than that of other causes.
early 15c., from Medieval Latin transpirationem, noun of action from transpirare (see transpire).
A Closer Look
Plants need much more water than animals do. But why? Plants use water not only to carry nutrients throughout their tissues, but also to exchange gases with the air in the process known as transpiration. Air, which contains the carbon dioxide that plant cells need for photosynthesis, enters the plant mainly through the stomata (tiny holes under its leaves). The air travels through tiny spaces in the leaf tissue to the cells that conduct photosynthesis. These cells are coated with a thin layer of water. The cell walls do not permit gases to pass through them, but the carbon dioxide can move across the cell walls by dissolving in the water on their surface. The cells remove the carbon dioxide from the water and use the same water to carry out oxygen, the main waste product of photosynthesis. All this mixing of water and air in transpiration, though, has one drawback: more than 90 percent of the water that a plant's roots suck up is lost by evaporation through the stomata. This is why a plant always needs water and why plants that live in dry climates, such as cacti, have reduced leaf surfaces from which less water can escape.