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

J Integr Plant Biol. 2010 Jun;52(6):549-55. doi: 10.1111/j.1744-7909.2010.00953.x.

Abstract

Root and shoot growth of Brassica campestris L. and B. juncea increased significantly (P < 0.01) with enhanced Ca(2+) 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 Ca(2+) concentration. The relative growth rate of shoot of both species reached its maximum at 8 mM of Ca(2+) concentration. Average rate of Ca(2+) intake (I(Ca)) was higher in B. juncea than B. campestris. In B. juncea, the average transport of Ca(2+) to shoot increased by 19%, 38%, 119%, 125% and 169% compared with the control. Furthermore specific utilization rate of Ca(2+) 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 Ca(2+) treatment. At 4, 6, 8 and 10 mM of Ca(2+) 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, Ca(2+) had a linear relationship with potassium and sulfur, whereas it was in antagonism with sodium ion.

MeSH terms

  • Brassica / drug effects
  • Brassica / growth & development*
  • Brassica / metabolism*
  • Calcium / metabolism*
  • Calcium / pharmacology
  • Plant Leaves / drug effects
  • Plant Leaves / growth & development
  • Plant Leaves / metabolism
  • Plant Roots / drug effects
  • Plant Roots / growth & development
  • Plant Roots / metabolism
  • Plant Shoots / drug effects
  • Plant Shoots / growth & development
  • Plant Shoots / metabolism
  • Sodium / pharmacology*

Substances

  • Sodium
  • Calcium