C - Lublin

70
70
60
50
101
183
y = 81,418e -0,0036x
R 2 = 0,89
60
50
2,3
10,1
y = 46,121e -0,0193x
R 2 = 0,67
Rd, s/cm
40
30
Rd, s/cm
40
30
20
10
340
425
440
20
10
21,7
28,7
63,7
0
0 100 200 300 400 500
Eh, mV
0
0 20 40 60 80
ODR, µg O 2 m -2 s -1
Fig. 3. Changes of stomatal diffussive resistance (Rd) in relation to Eg, ODR and
Eh (Triticum aestivum L.). Mean value ± standard deviation.
35
30
25
35
30
25
y = 23,796e -0,0086x
R 2 = 0,82
Rd, s/ cm
20
15
Rd, s/cm
20
15
10
5
y = -0,0315x + 28,883
R 2 = 0,65
0
0 100 200 300 400 500 600
Eh, mV
10
5
0
0 20 40 60 80 100
ODR, mg m -2 s -1
Fig. 4. Changes of stomatal diffussive resistance (Rd) in relation to Eg, ODR and
Eh (Triticale). Mean value ± standard deviation.
RESULTS
After 12 days of growth under unfavorable conditions of aeration the
availability of oxygen to roots ODR were change from 210 to 2 µg m -2 s -1 and Eh
from 490 tо -180 mV.
Under oxygen deficiency conditions experienced by the plant roots during
the12 days of flooding the soil a generalized adaptive response took place in the
leaves, which were in the normal aerobic conditions (Zakrzhevsky et al., 1995; Yan
et al., 1996). The root hypoxia resulted in an increase of the value of leaf stomatal
diffusive resistance up to 130 and 60 s/cm in Pisum sativum L.as well Triticum
aestivum L- non tolerant of oxygen stress plant; and up to 25 and 13 s/cm in the
case of Triticale L.and Zea mays L - less sensitive to the effect of unfavorable
factors plants.
25