Effects of osmosis and physical pressure.
H2O potential= determines direction (meas in MPa)
Conc/press and gravity contribute^
Chem potential= measure free energy(potential for performing work)
H2O moves from high to low chem poten.
Solute molecules attach to H2O.
(H2O in xylems dead cells under - pressure)
(Live cells under + pressure/turgor pressure)
Turgid cells push against each other/stiffened tiss/+ turgor for cell growth.
Root hairs= inc surf for absorption H2O and min.
H20/Nut flow
Apoplastic route= Cell wall/intercell space.
Symplastic= Connected by plasmodesmata.
Transpirational Pull= - press (tension) transmitted down stem/pulls H2O from rotts into leaf.
H2O raises through xylem (cohesion/adhesion/transpiration)
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