Agriculture Reference
In-Depth Information
8.0
y
=−
0.58
+
3.92x
r
2
6.0
=
0.79
4.0
2.0
0
0.5
1.0
1.5
Ψ
P
(MPa)
Figure 12.5
The relationship between the increase in area of apple
leaves and turgor potential (
)
over 24 h in the dark at 30
◦
C and
100% RH. Reproduced from Davies and Lakso (1979),with
permission.
ψ
p
0
Shoot
tips
−
1
−
2
−
3
Mature
leaves
−
4
−
5
0
20
40
60
80
100
120
Days after 1 June
Figure 12.6
Seasonal patterns of osmotic potentials of expanding
shoot tips (
) and mature leaves of apple trees in New York. The
different patterns for mature leaves (
•
,
) are from seasons with
different rainfall patterns. Reproduced from Lakso (1994) with
permission.
−
−
values found by Goode
et al.
(
) being about
bar for leaves and
bar for fruits.
Apple fruits shrink during the day as leaf water potentials become more
negative and then expand again as leaf water potential begins to increase.
