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what is a xerophyte?
a plant that is adapted to conserve water effectively because it lives in very dry conditions
what are the adaptations of xerophytes?
thick cuticle, waxy cuticle, hairs, rolled leaves, sunken stomata, spines, less stomata
how does a thick cuticle help conserve water?
impermeable to water
increase diffusion distance
how does a waxy cuticle help conserve water?
it reduces evaporation/transpiration
how do hairs on leaves help conserve water?
traps water vapour so decreases the water potential gradient
how does having rolled leaves help conserve water?
trap water vapour so the water potential gradient decreases
reduce exposure of stomata to air so less evaporation occurrs
how does having sunken stomata help conserve water?
they trap water vapour so the water potential gradient decreases
how does having spines help conserve water?
reduces SA:V so decreases rate of evaporation