Abstract：
Phytoremediation has become famous for removing particulate matter (PM) and volatile organic compounds (VOC) in situ. Plants for removing PM and VOC were associated with botanical biofilters to attract pollution to the plant. On the other hand, persistent pollution exposure can lower plant health and phytoremediation effectiveness; therefore, improving plant tolerance against stress is necessary. Various elicitors can enhance plant tolerance to certain stressors. This study aims to investigate different elicitors to maintain plant health and improve the use of plants in phytoremediation for PM and VOC pollution. This experiment used Sansevieria trifasciata hort. ex Prain under PM and VOC stress. Exogenous elicitors, such as proline, ornithine, and a commercial product, were applied to the leaf parts before exposure to PM and VOC stress. The initial concentrations of PM1, PM2.5, and PM10 were 300-350, 350-450, and 400-500 µg m-3, respectively, while the VOC concentration was 2.5-3.0 mg m-3. The plant was stressed for 7 days. The result indicated that ornithine 10 mM is vital in improving plant tolerance and inducing antioxidant enzymes against PM and VOC, while proline 50 mM and a commercial product could not reduce plant stress. This study suggests that ornithine might be an important metabolite to improve plant tolerance to PM and VOC.
摘要：
植物修复以原位去除颗粒物（PM）和挥发性有机化合物（VOC）而闻名。用于去除PM和VOC的植物与植物生物过滤器相关联，以将污染吸引到植物。另一方面,持久性污染暴露会降低植物健康和植物修复的有效性；因此，提高植物对胁迫的耐受性是必要的。各种诱导子可以增强植物对某些应激源的耐受性。本研究旨在研究不同的诱导因子，以维持植物健康并改善植物在植物修复中对PM和VOC污染的使用。本实验使用三片三七菌。在PM和VOC压力下进行预处理。外源性激发子,如脯氨酸,鸟氨酸,和商业产品，在暴露于PM和VOC胁迫之前应用于叶片部分。PM1，PM2.5和PM10的初始浓度分别为300-350，350-450和400-500µgm-3，而VOC浓度为2.5-3.0mgm-3。该植物被胁迫7天。结果表明，鸟氨酸10mM在提高植物耐受性和诱导抗PM和VOC的抗氧化酶方面至关重要。而脯氨酸50mM和商业产品不能降低植物胁迫。这项研究表明，鸟氨酸可能是提高植物对PM和VOC耐受性的重要代谢产物。
