Combined Stresses in Plants: Physiological, Molecular, and Biochemical Aspects

86 H. Guo et al.

f

e

d

cd concentration in

)-1 wheat grain (mg kg

cd added to soil (mg kg

-1

)

0

00

.5

2

1.5 1.2 0.9 0.6 0.3

FA

CE

Ambien

t

(^20)
1.6 1.2 0.8 0.4
cd concentration in
)-1 wheat shoots (mg kg
FA
CE
Ambient
cd concentration in
)-1 wheat grain (mg kg
1.5 1.2 0.9 0.6 0.3
0
FA
CE
Ambient
c
b
a
2
1.6 1.2 0.8 0.4^0
cd concentration in
)-1 wheat shoots (mg kg
FA
CE
Ambien
t
1.6 1.2 0.8 0.4
0
cd concentration in
)-1 wheat shoots (mg kg
FA
CE
Ambien
t
cd concentration in
)-1 wheat shoots (mg kg
6 5 4 3 2 1 0
FA
CE
Ambient
Fig. 4.9
Cadmium concentrations in tissues of wheat plants grown in soil with 0, 0.5, or 2.0
mg
kg
−1
Cd, under either ambient CO
levels or elevated CO 2
levels 2
( FACE
).
a Rice shoots at the mid-tillering growth stage of the first season,
b rice shoots at the panicle-initiation growth stage of the first season,
c rice shoots at
grain maturity of the first season,
d rice seeds at grain maturity of the first season,
e rice shoots at grain maturity of the second season, and
f rice seeds at grain
maturity
of
the
second
season.
Values
represent
means
±
SD.
An
asterisk
indicates
a
significant
difference
between
FACE
and
ambient
conditions
(
p^
<^ 0.05).
FACE
free-air CO
enrichment 2