纳米二氧化钛缓解镉胁迫下小麦幼苗生长及生理变化

刘娅; 陈金全; 杨子月; 金世博; 伏东堂; 申时立

doi:10.13205/j.hjgc.202105026

纳米二氧化钛缓解镉胁迫下小麦幼苗生长及生理变化

doi: 10.13205/j.hjgc.202105026

刘娅¹,
陈金全^2,3,
杨子月²,
金世博²,
伏东堂²,
申时立^2,3, ,

1. 云南大学国际河流与生态安全研究院, 昆明 650091;
2. 云南大学生态学与环境学院, 昆明 650091;
3. 云南大学生态学与环境学院暨云南省高原山地生态与退化环境修复重点实验室, 昆明 650091

基金项目:

云南省科技厅项目-应用基础研究计划面上项目（2019FB137）。

详细信息

作者简介:
刘娅(1997-),女,硕士研究生,主要研究方向为土壤重金属污染植物修复及调控。liuya@mail.ynu.edu.cn

通讯作者:
申时立(1983-),男,博士,助理研究员,主要从事土壤重金属污染生物修复研究工作。shenshili@ynu.edu.cn

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出版历程
- 收稿日期: 2019-12-04
- 网络出版日期: 2022-01-17

GROWTH AND PHYSIOLOGICAL INDEXES OF WHEAT SEEDLINGS UNER CADMIUM STRESS ALLEVIATED BY NANO TITANIUM DIOXIDE

1. Institute of International Rivers and Eco-security, Yunnan University, Kunming 650091, China;
2. School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, China;
3. School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming 650091, China

摘要

摘要: 研究了水培环境中不同浓度纳米二氧化钛（TiO₂-NPs）（0，25，50，100，200 mg/L）缓解Cd对小麦幼苗造成的生理毒害的作用。结果显示：在水培环境下TiO₂-NPs的施用，缓解了Cd对小麦带来的氧化胁迫，减轻了Cd对小麦的毒害作用，显著提高了小麦生物量、根长及株高，改善了小麦光合作用。中浓度（50，100 mg/L）TiO₂-NPs的使用显著提高了小麦幼苗净光合速率。对于所有浓度TiO₂-NPs的施用，小麦幼苗POD酶活均显著低于Cd处理组；SOD酶活在较低浓度（<200 mg/L）时显著低于Cd处理组。TiO₂-NPs通过减轻Cd氧化胁迫作用，有效缓解了Cd对小麦幼苗的毒害，提高了小麦幼苗的光合作用。
- 纳米二氧化钛 /
- 镉 /
- 小麦幼苗 /
- 生理响应
Abstract: The research mainly studied whether the use of different concentrations of nano-titanium dioxide (TiO₂-NPs) (0, 25, 50, 100 and 200 mg/L) in hydroponic environment could alleviate the physiological toxicity of Cd to wheat seedlings. The oxidative stress on wheat caused by Cd was alleviated by TiO₂-NPs application in the hydroponic environment. The toxicity of Cd to wheat seedlings was alleviated, the biomass, root length and plant height of wheat were significantly increased, and the photosynthesis of wheat was improved. The net photosynthetic rate of wheat seedlings was increased significantly at medium concentrations (50, 100 mg/L) of TiO₂-NPs. For all concentrations of TiO₂-NPs, the POD enzyme activity was significantly lower than the Cd treatment group; the SOD enzyme activity was significantly lower than Cd treatment group at lower concentrations (<200 mg/L). Results showed that the use of TiO₂-NPs effectively alleviated the toxicity of Cd to wheat seedlings and improved the photosynthesis of wheat seedlings by reducing the oxidative stress caused by Cd.
- nano titanium dioxide /
- cadmium /
- wheat seedlings /
- physiological response

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