钙离子对盐胁迫下油菜和芥菜生长的影响。
Role of Ca2+ on growth of Brassica campestris L. and B. juncea (L.) Czern & Coss under Na+ stress.
机构信息
Land Resources Research Programme, Institute of Natural Resources and Environmental Sciences, National Agricultural Research Centre, Islamabad 45500, Pakistan.
出版信息
J Integr Plant Biol. 2010 Jun;52(6):549-55. doi: 10.1111/j.1744-7909.2010.00953.x.
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.
Brassica campestris L. 和 B. juncea 的根和茎叶生长随着根介质中 Ca(2+)处理和 60 mM NaCl 的增强而显著增加（P < 0.01）。B. juncea 的茎叶鲜重最大值出现在 10 mM Ca(2+)浓度下。两种物种的茎叶相对生长率在 8 mM Ca(2+)浓度下达到最大值。B. juncea 的平均 Ca(2+)摄入量（I(Ca)）高于 B. campestris。在 B. juncea 中，与对照相比，Ca(2+)向茎叶的平均运输增加了 19%、38%、119%、125%和 169%。此外，B. juncea 的 Ca(2+)比 B. campestris 的比利用效率更高。与 2 mM Ca(2+)处理相比，B. campestris 中的 Ca(2+)分别在 4、6、8 和 10 mM 时增加了 9%、32%、41%和 59%。在 4、6、8 和 10 mM Ca(2+)的应用下，叶面积比分别增加了 10%、17%、23%和 30%。在 B. campestris 和 B. juncea 的茎叶部分，Ca(2+)与钾和硫呈线性关系，而与钠离子呈拮抗关系。
Zotero 插件