Joint International Conference on Long-term Experiments ...

difference of extinction %
120
100
80
60
40
20
0
72 hour
root
96 hour
root
120
hour
root
72 hour
Cp
time of germination
96 hour
Cp
120
hour Cp
control
SA 0.1mg/l
SA 1.0mg/l
SA 5.0mg/l
Figure.2 – Percentage differences in extinction which reflect the intensity of the
peroxidase activity in the roots and coleoptiles of maize plantlets.
Table 1. Results synthesis of peroxidase activity measurements in the vegetal extract
obtained from the roots and coleoptiles of the plantlets after 72, 96 and 120 hours of
germination on the substrated moisted with SA solutions of different concentrations
Parameter Hour of
germination
Peroxidase
extinction in
roots
Peroxidase
extinction in
coleoptiles
72
Salicylic acid mg/l concentration
Average± SD
Control SA 0.1mg/l SA 1.0mg/l
0.844±0.029 0.889±0.007 0.924±0.011
*
***
0.917±0.057
n.s.
n.s.
0.741±0.014 0.758±0.006 0.791±0.005
n.s.
***
0.931±0.039 0.992±0.0515 1.006±0.0105
n.s.
*
0.908±0.044 0.929±0.034 0.977±0.015
96 0.864±0.028 0.894±0.04
120
72
96
120
n.s.
0.761±0.021 0.788±0.0059
n.s.
*
0.799±0.0139
*
Studying the peroxidase activity intensity separately in the roots and coleoptiles of the
plantlets obtained from the germination of the maize caryopsis in SA solutions, after 72
489