| 刘秋霞,彭承浪,毛劲,文月,盛锋,杜雪竹.铁酸镍催化可见光还原缓解Cr(Ⅵ)对水稻幼苗的毒害[J].农业环境科学学报,2022,41(1):28-35. |
| 铁酸镍催化可见光还原缓解Cr(Ⅵ)对水稻幼苗的毒害 |
| Effects of visible light photocatalytic reduction by nickel ferrite on the alleviation of Cr(Ⅵ) toxicity to rice(Oryza sativa L.)seedling growth |
| 投稿时间：2021-06-02 |
| DOI：10.11654/jaes.2021-0638 |
| 中文关键词: 光催化 铬毒害 水稻 地上部 根系 干物质 |
| 英文关键词: photocatalysis chromium toxicity rice aboveground root dry biomass |
| 基金项目:湖北省重点研发计划项目（2018ABA080，2020BBB052）；湖北省中央引导地方专项（2020ZYYD036）；湖北省自然科学基金重点类项目（2019CFA027） |
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| 中文摘要: |
| 为明确铁酸镍可见光下催化还原Cr（Ⅵ）对水稻幼苗生长的影响，采用水培（Yoshida溶液）试验，设置对照、Cr（Ⅵ）胁迫和光催化3个处理，研究不同处理下水稻（7优88和7优370）幼苗苗长、根长、叶绿素、铬含量、干物质量及铬积累量的差异。结果表明：Cr（Ⅵ）胁迫显著抑制两个水稻品种的苗长和根长，降低叶绿素含量，破坏活性氧清除系统，引起丙二醛积累，阻碍水稻幼苗正常生长。与对照处理相比，Cr（Ⅵ）胁迫处理苗长降低10.4%~14.6%，根长降低57.8%~59.5%，叶绿素含量减少38.4%~42.6%，丙二醛含量增加82.9%~86.6%，地上部Cr（Ⅵ）含量增加66~130倍，植株干物质量降低10.4%~13.1%。光催化处理显著缓解了水稻受到的Cr（Ⅵ）毒害，与Cr（Ⅵ）胁迫处理相比，光催化处理后苗长和根长平均增加17.6% 和73.8%，Cr（Ⅵ）含量降低50.4%~50.7%，干物质量增加4.9%~5.9%，总铬积累量减少25.9%~27.8%，丙二醛含量降低28.9%~30.6%，植株生长状况明显改善。然而，与对照相比，光催化处理干物质减少5.1%~8.9%。研究表明，Cr（Ⅵ）胁迫显著抑制了水稻生长，铁酸镍可见光催化还原可有效缓解植株Cr（Ⅵ）毒害。 |
| 英文摘要: |
| Heavy metal pollution by Cr(Ⅵ)affects plant growth and development. Visible light catalysis is an effective method to reduce Cr(Ⅵ)pollution. To identify the effect of a nickel ferrite photocatalyst under visible light on the growth of rice contaminated with Cr(Ⅵ), a hydroponic test(Yoshida nutrient solution)was conducted. The rice varieties were 7 You 88 and 7 You 370. Three treatments were set, namely the contro(l CK), Cr(Ⅵ)stress treatment, and photocatalysis treatment. The seedling shoot length, root length, chlorophyll content, chromium content, dry matter, and chromium accumulation in varying treatments were investigated. The results showed that Cr(Ⅵ) contamination impeded the rice seedling shoot length and root length by 10.4%~14.6% and 57.8%~59.5%, respectively, relative to CK. In the Cr(Ⅵ)stress treatment, the chlorophyll content decreased by 38.4%~42.6%, the active oxygen scavenging system was destroyed, and there was 82.9%~86.6% more malondialdehyde accumulation. The aboveground Cr(Ⅵ)content was 66~130 times higher than that of CK. The rice seedling dry matter was reduced by 10.4%~13.1%. The seedling growth was severely restricted by Cr(Ⅵ)stress. Photocatalyst application significantly alleviated the Cr(Ⅵ)toxicity to rice plants. Compared with those of the Cr(Ⅵ)stress treatment, the shoot length and root length were increased by 17.6% and 73.8% on average in the photocatalysis treatment, respectively, and the aboveground Cr(Ⅵ) content, total chromium accumulation, and malondialdehyde content were decreased by 50.4%~50.7%, 25.9%~27.8%, and 28.9%~30.6%, respectively. Plant dry matter significantly increased by 4.9%~5.9% compared with that in the Cr(Ⅵ)stress treatment. However, the dry matter in the photocatalysis treatment was lower than that in CK, with a decrease of 5.1%~8.9%. Cr(Ⅵ)stress remarkably inhibite rice seedling growth, and visible-light photocatalysis of nickel ferrite plays an important role in Cr(Ⅵ)toxicity alleviation. |
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