Transpiration in plants | NMDCAT 2021

Hi Everyone! Welcome To My Channel "Ali Academy Biology Lectures" About This Video ........................ In This Video Lecture You Will Learn Basic Concept Of Transpiration You have already studied the role of transpiration, in ascent of sap. There are three types of transpiration depending upon the route of escape of water vapours from the aerial parts of the plant. (i) Cuticular transpiration (ii) Lenticular transpiration (iii) Stomatal transpiration (i) Cuticular transpiration : The loss of water in the form of water vapours through the cuticle the greater is the rate of transpiration; although the composition of cuticle is also important. At night, when the stomata are almost closed, cuticular transpiration takes place. Most of the factors route. which afect rate of transpiration, in general, are also important in controlling the rate of cuticular of leaves is called cuticular transpiration. About 5-7% of total transpiration takes place through this to water and some water is lost in the form of vapours through cuticle. The thinner the cuticle (ii) Lenticular transpiration : Lenticular transpiration is the loss of water vapours through transpiration. The cuticle present on the upper and lower epidermis of leaves is not completely impermeable lenticels present in the stem of some plants. All plants do not possess lenticels. (iii) Stomatal transpiration : It is a type of transpiration in which the water vapours escape through stomata. In isobilateral leaves the stomata are present, in both, upper and lower epidermis The guard cells are normally dumble or bean-seed-shaped. The inner concave sides of two guard e.g. lily and maize leaf. In dorsiventral leaves the stomata are conined to only the lower epidermis. cells enclose the stoma. This inner side of guard cell has very thick cell wall, but the outer convex side has thin cell wall. The guard cells are the only cells, of leaf epidermis, which are not connected is stomatal. by plasmodesmata to other epidermal cells, and which have chloroplasts - and thus are involved in the process of photosynthesis (Fig. 14.8). When these guard cells are turgid, the stoma between them opens and when the guard cells are laccid the stoma between them closes. The degree of opening of stomatal pores also afects the rate of transpiration. 90% of total transpiration in a plant The cells of mesophyll of leaf provide enormous surface ‘area for the loss of water in the form of vapours. The pathway of water vapours loss to the atmosphere, through stomata About This Channel..................... I make these videos cause I love to draw and connect the complexity of science and medicine into art. I'm not saying. I'm 100% correct in all my videos, but I do try to obtain the information from credible sources. One-stop destination for all biology lectures. _ students in class 11, 12 or appearing for competitive medical exams ( NMDCAT ) will find it very beneficial _ The videos are categories under various heading to make the students life simplified Visit My Other Channel Playlist ..................... NMDCAT PART 1:    • New 1st Year Biology   NMDCAT PART 2:    • New 2nd Year Biology   Class 11th Lectures:    • New 1st Year Biology   Class 12th Lectures:    • New 2nd Year Biology   Class 10th Lectures:    • Matric Biology   Subscribe My Channel:    / aliacademya7r   Social Link........................ Instagram: https://instagram.com/ranaalibiologis... TWINS