J. Akhtar et al., COMBINED EFFECT OF SALINITY AND HYPOXIA IN WHEAT (TRITICUM-AESTIVUM L) AND WHEAT THINOPYRUM AMPHIPLOIDS, Plant and soil, 166(1), 1994, pp. 47-54
The effects of sodium chloride salinity and hypoxia were studied in ei
ght wheat lines and three wheat-Thinopyrum amphiploids in vermiculite-
gravel culture. The lines were treated with either 100 or 150 mol m(-3
) NaCl with and without hypoxia. Saline hypoxic conditions significant
ly reduced the vegetative growth, water use, grain and straw yields fo
r all wheat varieties except the amphiploids, whereas NaCl or hypoxia
alone had less pronounced effects. In addition, saline hypoxic stress
reduced K+ concentration and increased significantly the Na+ and Cl- c
oncentrations in cell sap expressed from leaves. There was more Na+ an
d Cl- accumulation in wheats than the amphiploids in hypoxic condition
s at 150 mol m(-3) NaCl. Of the wheats, Pato was the most sensitive at
all stress levels while a Triticum aestivum cv. Chinese Spring x Thin
opyrum elongatum amphiploid was the most tolerant of the three amphipl
oids.