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5 Cards in this Set
- Front
- Back
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explain the 2 steps of stomatal transperation |
1. Water evaportates of from surface of mesophyll cells and water vapor fills air space 2. Water vapor diffuses out form area of high to low concentration(inside to lout side) |
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how do stomata regulate opening and closing |
1.light activates the transport of solutes into the guard cells. 2.water diffues into the guard cell casuing it to become turgor and open 3.reverse at night |
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explain how light draws water into the gurad cell |
1.phototropin is activated by blue light 2.which activates H+ ATPase 3.it pumps H+ ions out of the gurad cell creating a proton gradient 4.allows for K+ uptake 5.solute concentration increases casuing H20 to be drawn in opening the guard cell |
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what factors affect transpiration rates |
1. Temperture -transperation rate doubles for ever 10 degrees 2.Humidity -rate slow at high humity 3.air current -breese increase tranperation rate becasuing watervapor is pulled away by the breeze |
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explain using water potenetial that allow plant to up take water |
water potenetial must greatest in soil and decline from roots to leaves to atmosphere for trasnpiration to occur |
