曾强;李辉;侯磊;

• 1:西南林业大学生态与环境学院

摘要(Abstract)：

纳米TiO_2独特的理化性质使其成为应用最广泛的纳米材料之一,其进入水环境后对湿地植物产生的效应值得关注。以2类不同生活型的湿地植物大薸和泽泻为研究对象,纳米TiO_2浓度梯度设置为0、10、30和250 mg·L~(-1),在暴露14 d之后分析了光合参数的变化规律,基于植物生物量变化率、各部位Ti元素浓度及光合特征参数,讨论了可能的机制。结果表明,纳米TiO_2暴露促进了大薸和泽泻的生物量增长;纳米TiO_2暴露后,Ti元素主要富集在植物根部,富集量随浓度升高而增加,大薸植物体内Ti元素浓度明显高于泽泻;高浓度纳米TiO_2暴露能够显著改变2种植物的叶孔开放程度、CO2消耗状况及蒸腾速率,但对净光合速率的影响不显著。纳米TiO_2暴露对2种植物光合特征影响的差异可能与它们不同的生活型有关。

关键词(KeyWords)： 纳米TiO_2;湿地植物;光合作用

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(21607120);; 云南省一流学科(生态学)建设经费资助项目;; 西南林业大学本科生科技创新项目(Z17015)

作者(Author): 曾强;李辉;侯磊;

Email:

DOI:

参考文献(References)：

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