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