论文部分内容阅读
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(Ca) 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.
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 (Ca) was higher in B. juncea than B. campestris. B. juncea, the average transport of Ca2 + to shoot increased by 19%, 38%, 119%, 125% and 169% compared with the control.Furthermore, the 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, but it was in an tagonism with sodium ion.