柳树对砷的吸收和积累特性及其对菲的耐受性的分析.pdfVIP

Abstract Phytoremediation is a growing field of research in environmental studies because of the advantages it offers, such as environmental friendliness, cost effectiveness, and sustainability. Willow (Salix sp.) which has large biomass is low-cost and fast-growing. It is an important multipurpose tree species that shows high resistance to salt, alkali, drought, and water-logging stress. What ’s more, willow has a remarkable capacity to concentrate toxic heavy metals. The current study aims to explore the potential of willow to remediate arsenic-contaminated water and soil in hydroponics cultures and pot cultures. In the current study, five willow species were evaluated and compared to investigate the accumulation ability of arsenic from water and soil. All the willows in our study were cultivated in greenhouse or artificial climate incubator. Five willow species, namely, Salix jiangsuensis CL J-172, Salix matsudana, Salix integra Yizhibi, Salix inregra Weishanhu, and Salix mongolica were cultivated in hydroponics cultures. The arsenic tolerance, uptake influx, arsenic accumulation, and phytofilter ability of willows were tested in the current research. Salix integra Yizhibi had the highest root arsenic concentration at 604.66 mg·kg-1, whereas Salix matsudana had the lowest at 321.83 mg·kg-1 among the five tested species exposed to 80 μM arsenate As (V)). As (V) influx into S. integra Yizhibi was adequately described by the Michaelis–Menten equation, where Vmax (±SE) value -1 -1 was 3.42 ± 0.94 nmol ·kg DW min and Km (±SE) value was 14.82 ± 0.89 nM. The arsenic and phosphorus concentrations in the roots of S. int