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Water relations and Energy balance

Water relations and Energy balance. Ψ = Water potential. Ψ = Ψ π + Ψ p + Ψ m + Ψ g. Ψ π = osmotic potential Ψ p = pressure potential Ψ g = gravitational potential Ψ m = matric potential. -13.7 Mpa, (50 % relative humidity). -2.3. -1.9. -1.5. -0.1 (moist soil). Water potential.

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Water relations and Energy balance

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  1. Water relationsand Energy balance

  2. Ψ=Water potential Ψ= Ψπ+ Ψp+Ψm +Ψg • Ψπ = osmotic potential • Ψp= pressure potential • Ψg= gravitational potential • Ψm= matric potential

  3. -13.7 Mpa, (50 % relative humidity) -2.3 -1.9 -1.5 -0.1 (moist soil) Water potential

  4. Whole-plant adaptations to low water availability • Drought avoidance • Drought deciduous • Drought tolerant

  5. Anatomical and morphological adaptations • Leaf size and shape • Stomata properties • Characteristics of the cuticle • Pubescence • Vascular tissue • Roots

  6. Short wave radiant energy Long wave radiant energy Convection Latent heat Conduction Leaf boundary layer Energy balance

  7. Energy Balance Rn = the net amount of radiant heat energy H the sensible heat (conduction +convection) loss λE = latent heat loss

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