外源Ca^(2+)对干旱胁迫下沙地云杉幼苗抗旱性生理指标的影响

Effects of Exogenous Ca^(2+) on the Drought Resistance-Related Physiological Indexes of Picea mongolica Seedlings under Drought Stress

以盆栽沙地云杉幼苗为试验材料,分别移入含有不同Ca2+浓度(0mmol/L、5mmol/L、10mmol/L、20mmol/L)和不同百分比的PEG-6000(0%、15%、30%)的植物培养液中处理6h,研究水分胁迫下外源Ca2+对沙地云杉幼苗主要抗旱生理指标的影响,以期为Ca2+在沙地云杉耐旱生产中的应用提供参考依据。结果表明,外施Ca2+能够提高云杉幼苗叶片含水量和可溶性蛋白质的含量,减缓叶绿素的分解,降低MDA含量。4个梯度Ca2+浓度试验中,以10mmol/LCa2+浓度处理对提高云杉幼苗的抗旱性效果最佳。

Picea mongolica seedlings were used as test materials and soaked in the nutrient solutions with different Ca^2＋ concentrations （0 mmol/L, 5 mmol/L, 10 mmol/L, 20 mmol/L） and different percentages of PEG-6000 （0%,15%.30%） respectively for 6 h, to study the effects of Ca^2＋ on their main drought resistance-related physiological indexes and to provide reference for the application of Ca^2＋ in the production of Picea mongolica seedlings in dry sandy soil. The results indicated that Ca^2＋ could increase the leaf moisture content and soluble protein content, alleviate chlorophyll decomposition, and reduce MDA content. Among the 4 tested gradient concentrations, 10 mmol/L Ca^2＋ had the best results.