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Role of Ca 2+ on Growth of Brassica campestris L. and B. juncea (L.) Czern & Coss under Na + Stress
Author(s) -
Salim M.,
Asghar Rehana
Publication year - 2010
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/j.1744-7909.2010.00953.x
Subject(s) - brassica , shoot , calcium , potassium , sodium , horticulture , antagonism , chemistry , botany , zoology , biology , biochemistry , receptor , organic chemistry
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 (Î 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.