生态学杂志2024，Vol.43Issue(11)：3365-3375,11.DOI:10.13292/j.1000-4890.202411.032
旱柳对土壤纳米二氧化钛与镉单一及共存体系的响应特征
The response of Salix matsudana Koidz.to single and coexistence system of nano-titanium dioxide and cad-mium in soil
摘要
Abstract
Cadmium(Cd)is a kind of highly toxic heavy metal element which exists in nature for long time.Titani-um dioxide nanomaterials(TiO2 NPs)are a new type of nanomaterial widely used in various fields due to special surface properties,which inevitably enter the environment to coexist with Cd.The coexistence of Cd and TiO2 NPs in soil would affect plant growth.In this study,we conducted morphological,cytological,subcellular observations and physiological and biochemical measurements on Salix matsudana Koidz.seedlings under the single or combined treatments of Cd and TiO2 NPs in soils.The results showed that Cd and TiO2 NPs alone inhibited the growth and de-velopment of S.matsudana,produced peroxide damage,reduced photosynthesis,and altered the distribution of Cd in tissues and subcells.Low concentrations of TiO2 NPs in coexistence with Cd reduced the biotoxicity of Cd by changing the subcellular distribution of Cd,and alleviated the peroxidative damage and photosynthesis inhibition of Cd on S.matsudana.In contrast,high concentrations of TiO2 NPs coexisted with Cd increased the distribution of Cd in organelle fractions,aggravated Cd toxicity to plants,and inhibited plant growth.Therefore,the appropriate con-centration of TiO2 NPs can alleviate the toxic effect of environmental Cd stress on S.matsudana and improve its phytoremediation efficiency.Our findings provide theoretical basis for the application of S.matsudana in phytoreme-diation.关键词
旱柳/镉/纳米二氧化钛/植物修复Key words
Salix matsudana Koidz./cadmium/titanium dioxide nanoparticles/phytoremediation引用本文复制引用
王玥睿,王思源,朱珺,张炫宇,陈春源,王若曦,宋佳怡,邹金华..旱柳对土壤纳米二氧化钛与镉单一及共存体系的响应特征[J].生态学杂志,2024,43(11):3365-3375,11.基金项目
国家自然科学基金项目(31901184)和天津市自然科学基金项目(17JCYBJC22500)资助. （31901184）
