Department of Wood Science, Faculty of Forestry, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada.
Indian Head Research Farm, Agriculture and Agri-Food Canada, Indian Head, SK S0G 2K0, Canada.
Int J Environ Res Public Health. 2020 Oct 20;17(20):7641. doi: 10.3390/ijerph17207641.
Natural and anthropogenic soil degradation is resulting in a substantial rise in the extension of saline and industrially-polluted soils. Phytoremediation offers an environmentally and economically advantageous solution to soil contamination. Three growth trials were conducted to assess the stress tolerance of native Canadian genotypes of L., Michx., and one hybrid willow ( × ) to salinity and hydraulic fracturing (fracking) wastewater. Thirty-three genotypes were grown in NaCl or fracking wastewater solutions between 0 and 7 mS over a period of 3-4 months. was observed to be relatively salt-intolerant compared to and hybrid willow, which is likely caused by an inability of to restrict Na translocation. Photosynthesis and transpiration decreased with salinity treatments, and severe reductions occurred with exposure to fracking solutions. Raffinose and stachyose content was tripled in leaf and root tissues. In willows, Na was primarily confined to root tissues, Cl accumulated up to 5% dry weight in leaves, and K was translocated from roots to leaves. Willow genotypes CAM-2 and STL-2 displayed the greatest maintenance of growth and resistance to necrotic symptoms in all trials, suggesting that these genotypes may be useful for practical application and further field study.
自然和人为的土壤退化导致盐渍土和工业污染土壤的面积大幅增加。植物修复为土壤污染提供了一种环境和经济上有利的解决方案。进行了三次生长试验，以评估加拿大本地 L.、Michx. 和一个杂交柳树（×）基因型对盐度和水力压裂（压裂）废水的胁迫耐受性。在 3-4 个月的时间里，将 33 个基因型种植在 NaCl 或压裂废水中，浓度范围为 0 至 7 mS。与 和杂交柳树相比， 相对耐盐，这可能是因为 不能限制 Na 的转运。光合作用和蒸腾作用随盐度处理而降低，暴露于压裂溶液中会严重降低。叶片和根组织中的棉子糖和水苏糖含量增加了两倍。在柳树中，Na 主要局限于根组织，Cl 在叶片中积累高达 5%的干重，K 从根转运到叶。在所有试验中，CAM-2 和 STL-2 这两个柳树基因型表现出最大的生长维持和对坏死症状的抗性，这表明这些基因型可能对实际应用和进一步的田间研究有用。
