BAI GIANG AI LUC NUOC TRONG CAY (Water potential )

Water potential and water transport in plant Biological Science, 4 th edition, pp... • Plant have big genome size • Plant are the most productivity • CO2 fixing by using water and light

Water potential and

water transport in plant

Biological Science, 4 th edition, pp 717-720

• Role of water in plant

• Water potential

• Calculate water potential

• Aquaporin

• Plant have big genome size

• Plant are the most

productivity

• CO2 fixing by using water and light energy

H 2 O

H 2 O

• Dissolve and transport

mineral from roots to leaves or other parts

• Moderate the plant

surfaces: leaves, stems

surfaces: leaves, stems

• Open stomata to up

take CO2 for photosynthesis

Osmosis system

W = Ψ s = − RTCi

• R: ideal gas constant

• T: absolute temperature (Kelvin): 273+t

• C: concentratrion in molarity of the solute

• i: Van’t Hoff factor (express the ionization level of

solution:

i= 1 + α*(n-1) α: segregation coefficient

n: number of ions that from electrolytic dissociation Pure water: Ψ s = 0 MPa

Solution of 1M Sucrose, Proline: Ψs = -2.4 MPa

Calculate water potential