Combined Effect of Salinity and Hypoxia on Growth, Ionic Composition and Yield of Wheat Line 234-1
Titel:
Combined Effect of Salinity and Hypoxia on Growth, Ionic Composition and Yield of Wheat Line 234-1
Auteur:
M. Saqib R. H. Qureshi
Verschenen in:
Pakistan journal of biological sciences
Paginering:
Jaargang 1 (1998) nr. 3 pagina's 167-169
Jaar:
1998
Inhoud:
The present experiment was designed to study the response of wheat line 234-1 to the combined stress of NaCl salinity and hypoxia in soil culture in pots. All the growth parameters (shoot fresh and dry weights, shoot length, number of tillers, CO2 assimilation and transpiration rates) and yield components (number of tillers, total biomass, number of spikes, 100 grain weight and grain yield) except number of spikelets were significantly affected under saline hypoxic conditions. This combined effect of salinity and hypoxia was more negative than any of the individual stresses. The ionic composition of leaves was also disturbed. The concentration of Na+ and Cl- was generally increased while K+ concentration decreased. Hypoxia increased the grain yield significantly, however, salinity alone caused a non significant reduction while a significant reduction was observed under saline hypoxic conditions. Grain yield was 5.15 g, 4.24 g, 3.52 g and 1.45 g under hypoxic, controlled, saline and saline hypoxic conditions, respectively.
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