3.2.3.11 Effect of salt stress on K + contents in leaves K
+
plays direct role in stomatal conductance and photosynthesis by regulating the
opening and closing of stomata and hence its presence in leaves is a beneficial
character in terms of growth and development of crop plant especially under stress
condition. Concentration of K
+
was highly affected in the leaves of linseed by the
application of salinity (NaCl) and K
+
contents were significantly decreased between
control and 200 mM NaCl (Table 3.2.6). Linseed genotypes also differed significantly
and the maximum K
+
contents were measured in the leaves of salt tolerant genotype
NO-303 while the minimum K
+
contents were noted in C-99-3-115 genotype. In
control, K
+
contents were more in the leaves of C-99-3-115 than that of S-907 while
genotype NO-303 had more K
+
accumulation than 637-72 genotype. With increasing
NaCl treatments, the K
+
contents in the leaves of all linseed genotypes declined
sharply.
85
Table 3.2.6. Effect of different levels of NaCl (mM) on Na
+
and K
+
contents in leaves of salt sensitive (S-907 and C-99-3-115)
And salt tolerant (637-72 and NO-303) genotypes of linseed.
Genotypes Na + (%) K + (%) Control NaCl (100 mM) NaCl (200 mM) Control NaCl (100 mM) NaCl (200 mM) S-907 0.14± 0.03
3.55±0.05
4.51±0.03
1.80 ± 0.06
0.76±0.03
0.40 ±0.05
