Interactive effects of nacl induced salinity, calcium and potassium on physiomorphological traits of sorghum (sorghum bicolor l.)

Jafari, M.H.S. and Kafi, Mohammad and Astaraie, Alireza (2009) Interactive effects of nacl induced salinity, calcium and potassium on physiomorphological traits of sorghum (sorghum bicolor l.). Pakistan Journal of Botany, 41 (6). pp. 3053-3063.

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Abstract

The interactive effects of salinity, calcium and potassium on physiomorphological traits of sorghum (Sorghum biclolor L.) were studied in a green-house experiment. Treatments included 4 levels of NaCl (0, 80, 160, and 240 mM NaCl), 2 levels of CaCl2 (0 and 20 mM), and 2 levels of KCl (0 and 20 mM). Salinity substantially reduced the plant growth as reflected by a decrease in the plant height, shoot and root weight, and percent of mortality and delay in the reproductive stage, but the relative water content as well as CO2 assimilation rate and transpiration rate were negatively affected only at severe salinity. Root/shoot weight and leaf blade/total plant weight ratios were increased under saline conditions, which led sorghum to tolerate in the presence of salinity. Application of supplemental calcium resulted in partially restoring the adverse effects of high salinity on plant growth, whilst application of additional potassium had a negative interaction on plant growth characteristics. Combined application of Ca2+ and K+ also resulted into an ameliorative effect on sorghum growth and morphological traits under salinity stress.

Item Type: Article
Author Affiliation: Department of Agronomy, Ferdowsi University of Mashhad, Iran
Subjects: Plant Physiology and Biochemistry > Biochemistry
Social Sciences > Plant Physiology and Biochemistry > Biochemistry
Divisions: Sorghum
Depositing User: Mr T L Gautham
Date Deposited: 05 Dec 2010 17:15
Last Modified: 29 Dec 2010 20:03
Official URL: http://www.pakbs.org/pjbot/PDFs/41(6)/PJB41(6)3053...
URI: http://eprints.icrisat.ac.in/id/eprint/882

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