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December
0
200
400
600
800
1000
1200
wPD= -2.8 MPa
DuneValley
wPD= -1.3 MPa
g l (
mm
ol m
-2s-1
)
-4 -2 0 2 4 6 8 10 12 14-4.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0w
gl
Hours since sunrise
w (M
Pa)
February
wPD= -1 MPa wPD= -2 MPa
Valley Dune
-4 -2 0 2 4 6 8 10 12 140
200
400
600
800
1000
1200wgl
Hours since sunrise
g l(m
mol
m-2
s-1)
Online Resource 1
a
c
b
d
Water status, drought responses and growth of Prosopis flexuosa trees with different access to the water table in a warm South American desert
Carla V. Giordano*, Aranzazú Guevara, Hernán E. Boccalandro, Carmen Sartor and Pablo E. Villagra*IADIZA CCT-Mendoza [email protected]
Daily leaf conductance to water vapor (gl) in representative valley and dune adult trees with contrasting pre-dawn leaf water potentials (ΨwPD) during a dry (a) and wet (b) period. c) and d) Daily gl and Ψw in the valley tree. Symbols represent single measurements; the vertical dashed line indicate local solar noon.