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Significant reduction of seedling root length was observed, due to increased concentration of Na₂CO₃ and considerable variation was found between accessions for growth in salt. Analysis by non-linear least square inversion method using root length data revealed significant differences in pearl millet accessions on the basis of salinity threshold Ct, the Na₂CO₃ solution concentration at which root length begins to decrease. The concentration caused a 50% decrease in root length (C50) and the concentration causing zero root growth (C0). From the comparison of these three characters, C50 appears to be a useful character by means of assessing and quantifying salinity tolerance.

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Effect of increasing concentrations of sodium carbonate on pearl millet Pennisetum americanum

Abstract