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Water relations and Energy balance

Explore the complexities of water potential and energy balance in plants, including adaptations to low water availability through drought avoidance, deciduous traits, and tolerance mechanisms. Learn about anatomical and morphological features such as leaf properties, cuticle characteristics, and root systems for efficient energy usage.

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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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