Effect of halo (KCl) priming on seed germination and early seedling growth of wheat genotypes under laboratory conditions

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Published: May 15, 2015
Keywords:
Wheat genotype Potassium use efficiency Water stress

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Chachar, K. M.
Department of Crop Physiology, Sindh Agriculture University, Tandojam, Pakistan
Chachar, Q. I.
Department of Crop Physiology, Sindh Agriculture University, Tandojam, Pakistan
Chachar, N. A.
Department of Crop Physiology, Sindh Agriculture University, Tandojam, Pakistan
Chachar, S. D.
Department of Biotechnology, Sindh Agriculture University, Tandojam, Pakistan
Chachar, M. H.
Department of Biotechnology, Sindh Agriculture University, Tandojam, Pakistan

Abstract

Generally K-deficiency decreased all the growth parameters, root and shoots K-uptake, root and shoot K-concentration and potassium use efficiency (KUE). However, comparatively less relative reduction (%) or potassium stress factor (KSF) was observed in most of the growth parameters in the genotypes NIA-8/7, NIA-MB-I, SD-4085/3 and SD-4047. Absolute growth rate (g day-1) and relative growth rate (g g-1day-1) was increased by 19 % under K-deficient environment in the genotype SD-4085/3, whereas comparatively less relative reduction was exhibited in the RGR in the genotypes NIA-8/7 (11 %), SD-4047 (14 %), SD- 502 (8 %). Root dry weight showed 8.20% increase in the genotype 22-03 under K-deficient environment, whereas no relative reduction was found in the genotype SD-4085/3 and SD-502 under the same environment (K-deficient). The genotypes NIA-8/7 and SD-4085/3 exhibited 2.89 and 26.69% increase, respectively in the shoot dry weight under K-deficient environment. Among all the nine genotypes evaluated in this study, increase in root potassium uptake under K-deficient environment was found in the genotype 22-03 (27%), whereas comparatively less relative reduction was observed in the genotype SD-4085/3 (6%). The genotype SD-4047 exhibited less relative reduction (8.9%) in the shoot potassium uptake. In conclusion the genotypes NIA-8/7 (0.32 g-2 SDW mg-1 shoot K), NIA-MB-I (0.2703 g-2 SDW mg-1 shoot K), SD-4085/3 (0.2987 g-2 SDW mg-1 shoot K) and SD-4047 (0.2567 g-2 SDW mg-1 shoot K) had higher potassium use efficiency among all the genotypes evaluated. It was concluded from this study that wheat genotypes differ in growth response and potassium use efficiency (KUE) when grown at deficient and adequate K-level.

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Chachar, K. M., Chachar, Q. I., Chachar, N. A., Chachar, S. D., & Chachar, M. H. (2015). Effect of halo (KCl) priming on seed germination and early seedling growth of wheat genotypes under laboratory conditions. International Journal of Agricultural Technology, 11(4), 839–853. retrieved from https://li04.tci-thaijo.org/index.php/IJAT/article/view/6365
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Vol. 11 No. 4 (2015): May
Section
Original Study
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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