PJB-1991-2
RELATIVE GROWTH RATE AND ION TRANSPORT IN RICE GROWN UNDER SALINE ENVIRONMENT
M. ASLAM,
R.H.QURESHI N. AHMED AND M.A. KAUSAR
Abstract
An experiment was conducted in solution
culture with two rice cultivars of varying self-tolerance: NIAB 6 (Salt tolerant) and IR
1561 (Salt sensitive), to compare their growth rate and ion transport from root to shoot when exposed to salinity levels of 0 and 100 mole m-3 NaCl. NIAB 6 had a faster rate of growth than IR 1561 under saline conditions. At early seeding stage, rate transport of Na+, K+ and Cl- was much higher in IR 1561 but later on , transport of Na+ and K+ was greater in NIAB 6 whereas Cl- transport higher in IR 1561. The higher rate of Na+ translocation from root to shoot in NIAB 6 was probably mitigated by the dilution of Na+ due to faster rate of growth
of this cultivar.
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