Investigating physiological and biochemical


Download 1.66 Mb.
Pdf ko'rish
bet56/92
Sana23.02.2023
Hajmi1.66 Mb.
#1223979
1   ...   52   53   54   55   56   57   58   59   ...   92
Bog'liq
Muhammad Abdul Qayyum UAF 2015 Soil Env Sciences

 
 
Table 3.3.1. Relative water contents (RWC) and electrolyte leakage (EL) of linseed genotypes at different salinity levels 
 
Genotypes 
Relative water contents (%) 
Electrolyte leakage (%) 
Control 
NaCl
(100 mM) 
NaCl
(200 mM) 
Control 
NaCl
(100 mM) 
NaCl
(200 mM) 
S-907 
31.40±0.31 
21.10±0.38
15.60±0.21
18.50±0.29 
22.70±0.21
26.90±0.38
C-99-3-115 
31.53±0.24 
21.13±0.49
15.57±0.26
18.57±0.32 
22.87±0.43
26.83±0.35
637-72 
31.80±0.46 
21.50±0.29
15.77±0.34
18.40±0.23 
22.33±0.18
26.27±0.43
NO-303 
31.76±0.44 
21.47±0.15
15.73±0.32
18.33±0.48 
22.30±0.12
26.10±0.26
Each value is an average of 3 replications ± SE
 
 
 
 


103 
respectively (Table 3.3.1). On the other hand, EL was relatively higher i.e. 26.90% 
and 26.83% in salt sensitive genotypes S-907 and C-99-3-115 respectively at 200 mM 
NaCl.
 
3.3.3.2 Effect of salt stress on photosynthetic pigments
 
Effect of NaCl application on chlorophyll ‘a’, ‘b’ contents and chlorophyll a+b in 
four linseed genotypes are depicted in Table 2. Salinity treatments caused significant 
decrease in chlorophyll ‘b’ in all the four genotypes while there was no significant 
decrease in chlorophyll ‘a’ contents in linseed genotypes at all the treatment levels. 
On the other hand, a significant decrease in chlorophyll a+b was observed in all the 
four genotypes with increasing levels of salinity (Table 3.3.2). Maximum chlorophyll 
‘a’ (0.25 mg g
-1
FW) and chlorophyll ‘b’ (0.23 mg g
-1
FW) was recorded in control 
treatment while minimum concentration of chlorophyll ‘a’ (0.21 mg g
-1
FW) and ‘b’ 
(0.10 mg g
-1
FW) was observed at 200 mM NaCl. Similarly, the maximum 
chlorophyll a+b was recorded at control and the minimum quantity of chlorophyll a+b 
was recorded at 200 mM NaCl. There was no significant difference in linseed 
genotypes for chlorophyll ‘a’ at all the treatments but chlorophyll ‘b’ contents were 
significantly varied among genotypes. At 100 mM NaCl, chlorophyll ‘b’ decreased 
progressively and its reduction ranged from 0.23 to 0.19 mg g
-1
FW in NO-303 
genotype and from 0.20 to 0.15 mg g
-1
FW in S-907 genotype. While at 200 mM 
NaCl, chlorophyll ‘b’ further reduced to 0.16 mg g
-1
FW in salt tolerant genotypes 
while it was 0.10 mg g
-1
FW in salt sensitive genotypes. At 200 mM NaCl, the 
maximum chlorophyll a+b contents were found in salt tolerant genotypes while the 
minimum were measured in S-907 (Table 3.3.2). On % control basis, genotype 
637-72 performed better followed by NO-303 at both 100 and 200 mM NaCl 
concentrations.


104 
Table 3.3.2. Chlorophyll contents (a, b) and chlorophyll a+b in leaves of salt sensitive (S-907 and C-99-3-115) and salt tolerant (637-72 and 
NO-303) genotypes of linseed.

Download 1.66 Mb.

Do'stlaringiz bilan baham:
1   ...   52   53   54   55   56   57   58   59   ...   92




Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©fayllar.org 2024
ma'muriyatiga murojaat qiling