School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch, 8140, New Zealand.
Environ Monit Assess. 2018 Jun 17;190(7):408. doi: 10.1007/s10661-018-6790-4.
Tagetes patula (marigold) and Petunia grandiflora (petunia) have been shown to exhibit potential in phytoremediation of environmental pollutants including heavy metals and textile dyes. To investigate their phytoremediation potential of diesel, it was necessary to evaluate diesel phytotoxicity of these two ornamental plants. Marigold and petunia seeds were incubated, for 10 and 15 days, respectively, in deionised water contaminated with 0 to 4%, v/v, diesel in Petri dishes in a growth room with continuous lighting at 25 °C. It was found that as far as seed germination was concerned, petunia was less sensitive than marigold to 4% diesel in water. In contrast, petunia exhibited poorer seedling root growth than marigold in the presence of diesel contamination. This finding of differential sensitivity of these two ornamental plants to diesel-contaminated water during germination and seedling growth has not been reported before. Therefore, the implications of phytotoxicity evaluation and comparison between different species or genotypes of plants at both seed germination and postgermination seedling growth should both be taken into consideration in screening tolerant plants for phytoremediation.
万寿菊（Tagetes patula）和矮牵牛（Petunia grandiflora）已被证明具有修复环境污染物（包括重金属和纺织染料）的潜力。为了研究它们对柴油的植物修复潜力，有必要评估这两种观赏植物对柴油的植物毒性。在生长室内，将万寿菊和矮牵牛的种子分别在含有 0 至 4%（体积/体积）柴油的去离子水中孵育 10 天和 15 天，然后在培养皿中进行，生长室内保持连续光照，温度为 25°C。结果发现，就种子发芽而言，4%柴油对矮牵牛的毒性比对万寿菊的毒性要小。相比之下，在柴油污染的情况下，矮牵牛的幼苗根生长比万寿菊差。以前没有报道过这两种观赏植物在发芽和幼苗生长过程中对受柴油污染的水的敏感性存在差异。因此，在筛选用于植物修复的耐受植物时，应考虑在种子发芽和发芽后幼苗生长阶段对不同物种或基因型植物的植物毒性评价和比较的影响。
