Transpiration is the process where plants absorb water through the roots and then give off water vapor through pores in their leaves. An example of transpiration is when a plant absorbs water in its roots. through the pores of the skin or through the surface of leaves and other parts of plants.

Transpiration is the evaporation of water from the surface of leaf cells in actively growing plants. This water is replaced by additional absorption of water from the soil leading to a continuous column of water in the plant’s xylem.

Dave Campbell explains that evaporation occurs when water changes from a liquid state to a gaseous state. It can happen anywhere there is water – in the soil, lakes, oceans and plants. When it occurs in plants, water is lost through microscopic pores in the plant’s leaves (stomata).

Evaporation is defined as the process in which the state of water from liquid to gaseous or to vapour state takes place. The melting of an ice cube is an example of evaporation. Evaporation of acetone which is used for removing nail paint is another everyday example of evaporation.

Stomatal Transpiration: It is the most important type of transpiration. Stomatal transpiration constitutes about 50-97% of the total transpiration.

This is transpiration. It has two main functions: cooling the plant and pumping water and minerals to the leaves for photosynthesis. The stomata (pores) must open to take in carbon dioxide for photosynthesis (especially important on mornings of sunny days).

When the plant opens its stomata to let in carbon dioxide, water on the surface of the cells of the spongy mesophyll and palisade mesophyll evaporates and diffuses out of the leaf. This process is called transpiration . Water molecules inside the xylem cells are strongly attracted to each other. …

Transpiration : The evaporation of excess water from the stomata present in leaves of plants is called transpiration. Two functions : i It is important for upward movement of water in plants. ii It helps in regulating temperature of plant.

Advantages of transpiration: It helps in the exchange of gases. It helps in sending out excessively absorbed water by plants. It helps in the development of the plant body. It helps in the absorption and distribution of water in plants.

Plants have tissues to transport water, nutrients and minerals. Xylem transports water and mineral salts from the roots up to other parts of the plant, while phloem transports sucrose and amino acids between the leaves and other parts of the plant.

Similarities between Xylem and Phloem Ø Both contain living and dead cells. Ø Both contain parenchymatous cells. Ø Both contain fibres. Ø In primary vascular bundles both xylem and phloem are differentiated into proto- and meta- elements.

Xylem is the tissue of vascular plants that transports water and nutrients from the soil to the stems and leaves.

Medullary rays is not found in xylem tissue.

Xylem formation begins when the actively dividing cells of growing root and shoot tips (apical meristems) give rise to primary xylem. When this happens, the primary xylem cells die and lose their conducting function, forming a hard skeleton that serves only to support the plant.