Transpiration Flashcards
Define transpiration
Transpiration is the process in which water is lost as water vapour from the aerial parts of the plant
What are the three types of transpiration
Tomato transpiration lenticular transpiration and cutie cular transpiration
Define stomatal transpiration
Evaporation of water through the stomata of the plant most of the water from the plant is transpired this way the water near the surface of the leaves change into vapour an evaporate when stomata are open
Define lenticular transpiration
Lenticles are minute openings in the bark of branches and twins evaporation of water from the lenticles of the plant is known as lenticular transpiration minimal amount of water is lost through the landicals as it is not present in all the plants
Cutiecular transpiration definition
It is the evaporation of water through the cuticle of the plant cuticle is a waxy coating on the surface of the deals of the plant during dry conditions to Mata are closed more water is transpired through the criticals
Define transpirational pull
When the water evaporates through the leaves a pull created through the xylem and the water moves back to the leaves
Define Cohesion
The mutual attraction between molecules of water
Adheshan definition
The attraction of water molecules towards the polar surface
Surface tension definition
The molecule of water are more attracted to each other in the liquid phase than the gas phase
Opening and closing of stomata mechanism
It remains open during the daytime and closed at the night time due to the turgidity of the cells that when the turgidity of guard cell increases the stomata opens and when the turgidity of the guard cell decreases the stomata closes
State the start sugar theory relating to the opening and closing of stomata
Enlight the starch converts to sugar sugar increases the osmotic concentration of cell SAP of the cardshell which results that they observe more water from the neighbouring epidermal cells and the increase in turgidity of guard cells which reserved in opening of stomata in dark the sugar is converted into starch leading to the closure of stomata
Define the active potassium ion transport mechanism relating to the opening and closing of
Accommodation of potassium ion in the guard cell increases the negative of the osmotic potential of the guard cell causing the stomata 2 open. in dark the potassium iron moves out of the guard cells and their osmotic potential becomes less negative has water moves out of the card cell and their turgidity decreases causing the closure of stomata
What are the internal factors affecting the transpiration
The leaf area leave structure rolling twisting and curling latex root shoot ratio
What are the internal factors that affect the transpiration
Light only up to a certain point the increasing light intensity will increase the rate of transpiration temperature transpiration increases with the Rise and temperature at muscheric humidity transpiration is greater than the humidity is low when increases transpiration atmospheric pressure transpiration rate increases with the decrease in atmospheric pressure carbon dioxide increase in concentration of carbon dioxide over the normal level causes decrease in the rate of transpiration
What are the advantages of transpiration
Maintenance of turgidity promotion of uptate translocation of solute reduction of lead temperature absorption of water cooling effect
