Abstract
Salt tolerance was studied in eight upland cotton cultivars (CIM-446, CIM-473, CIM-496, CIM-499, CIM-506, CIM-554, CIM-707 and SLH-284) under four NaCl salinity concentrations (50, 100, 150 and 200 mM) and control.Significant (p≤0.01)variations were observed among cultivars, salinity concentrations, and cultivar by salinity interactions for various growth traits and ions (K + and Na + ) accumulation in dry shoot and root tissues.As compared to control, the growth variables were decreased by increasing concentrations of NaCl; however, greatest reduction was observed at salinity stress of 200 mM.The uptake of K + and Na + were inversely proportional, and Na + accumulation was least in control and gradually amplified as the salinity increased.The K + absorption was highest in control and gradually decreased through increased salinity in shoot and root tissues.The foliage has more capacity for Na + accumulation than roots which ensured increased K + absorption in roots.The K + /Na + ratio of various genotypes differed significantly at various NaCl concentrations.Cultivar CIM-707 by having medium K + /Na + ratio, showed better K + utilization, and identified as most tolerant genotype to salinity.Such studies are useful in identification of salt tolerant cotton genotypes for salt affected areas, and farming community can benefit by getting optimum yield from cultivar CIM-707.
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Claims 8
Claim · model-written summary
Cultivars, salinity concentrations and their interaction differed significantly for growth and ion accumulation.
- Taxon
- upland cotton cultivarse1
- Material
- cultivarse0
- Treatment
- salinity concentrationse0
- Outcome
- various growth traits and ions (K + and Na + ) accumulatione0
Not reportedDirection
Verbatim
e0“Significant (p≤0.01)variations were observed among cultivars, salinity concentrations, and cultivar by salinity interactions for various growth traits and ions (K + and Na + ) accumulation in dry shoot and root tissues.”
e1“upland cotton cultivars”
Claim · model-written summary
Growth variables decreased with increasing NaCl, most at 200 mM.
Verbatim
e0“As compared to control, the growth variables were decreased by increasing concentrations of NaCl; however, greatest reduction was observed at salinity stress of 200 mM.”
e1“upland cotton cultivars”
Claim · model-written summary
Na accumulation increased as salinity increased, and was lowest in controls.
Verbatim
e0“Na + accumulation was least in control and gradually amplified as the salinity increased.”
e1“upland cotton cultivars”
e2“increased salinity in shoot and root tissues”
Claim · model-written summary
Potassium absorption declined as salinity rose in shoots and roots.
Verbatim
e0“The K + absorption was highest in control and gradually decreased through increased salinity in shoot and root tissues.”
e1“upland cotton cultivars”
Claim · model-written summary
Potassium and sodium uptake varied inversely.
Verbatim
e0“The uptake of K + and Na + were inversely proportional”
e1“upland cotton cultivars”
Claim · model-written summary
Foliage accumulated more sodium than roots.
Verbatim
e0“The foliage has more capacity for Na + accumulation than roots”
e1“upland cotton cultivars”
Claim · model-written summary
Genotypes differed significantly in potassium to sodium ratios across NaCl concentrations.
Verbatim
e0“The K + /Na + ratio of various genotypes differed significantly at various NaCl concentrations.”
e1“upland cotton cultivars”
Claim · model-written summary
CIM-707 showed better potassium use and was identified as most salinity tolerant.
Verbatim
e0“Cultivar CIM-707 by having medium K + /Na + ratio, showed better K + utilization, and identified as most tolerant genotype to salinity.”
e1“upland cotton cultivars”
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