Biology 2483A Lecture : Energy Exchange in Plants
21 Dec 2011
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Plants face challenges heat exchange lose it through evapotranspiration. Conduction and convection (conduction- transfer touching ) (convection is moving heat away from body) Stomates in plants transpire water out - #of stomates and amount they keep open. If soil water is limited, transpiration cooling is not a good mechanism leaves wilted because its been transpiring to lose heat but lost a lot of water die. Some plants shed their leaves during dry seasons (grow back later when it gets wet) Other mechanisms include pubescence hairs on leaf surfaces that reflect solar energy. Pubescence grow white hairs that allow the plan to reflect energy. Desert shrubs different specie put into different habitats desert/cooler and moisture habitats. Put all 3 species and put them in common gardens both locations. Cool moist not really differences in the plants not under heat stress.
