J Integr Plant Biol. ›› 2010, Vol. 52 ›› Issue (6): 549-555.DOI: 10.1111/j.1744-7909.2010.00953.x

Special Issue: Abiotic Stresses

• Metabolism and Biochemistry • Previous Articles     Next Articles

Role of Ca2+ on Growth of Brassica campestris L. and B. juncea (L.) Czern & Coss under Na+ Stress

Badr-uz-Zaman1*, M. Salim1 and Rehana Asghar2   

  1. 1Land Resources Research Programme, Institute of Natural Resources and Environmental Sciences, National Agricultural Research Centre, Islamabad 45500, Pakistan
    2Department of Botany, University of Arid Agriculture, Rawalpindi 46300, Pakistan
  • Received:2009-11-04 Accepted:2009-11-23 Published:2010-04-30
  • About author: *Author for correspondence Tel: +92 03345064517; Fax: +92 051 9255034; E-mail: badruaar@yahoo.com

Abstract:

Root and shoot growth of Brassica campestris L. and B. juncea increased significantly (P < 0.01) with enhanced Ca2+ treatment along with 60 mM NaCl in the root medium. The maximum fresh mass of shoot and root in B. juncea was recorded at 10 mM Ca2+ concentration. The relative growth rate of shoot of both species reached its maximum at 8 mM of Ca2+ concentration. Average rate of Ca2+ intake (ÎCa) was higher in B. juncea than B. campestris. In B. juncea, the average transport of Ca2+ to shoot increased by 19%, 38%, 119%, 125% and 169% compared with the control. Furthermore specific utilization rate of Ca2+ was higher in B. juncea than B. campestris. In B. campestris it increased by 9%, 32%, 41% and 59% at 4, 6, 8, and 10 mM of calcium in comparison to 2 mM Ca2+ treatment. At 4, 6, 8 and 10 mM of Ca2+ application, the increase in the leaf area ratio was 10, 17, 23 and 30%, respectively. In the shoot and root portions of B. campestris and B. juncea, Ca2+ had a linear relationship with potassium and sulfur, whereas it was in antagonism with sodium ion.

Badr-uz-Zaman, Salim M, Asghar R (2010) Role of Ca2+ on growth of Brassica campestris L. and B. juncea (L.) Czern & Coss. under Na+ stress. J. Integr. Plant Biol. J. Integr. Plant Biol. 52(6), 549–555.

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