首页 > 过刊浏览>2023年第31卷第5期 >679-685. DOI:10.11926/jtsb.4685
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纳米二氧化钛对生菜的生长效应分析
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中央高校基本科研业务费专项基金(202210004009)资助


Analysis on the Growth Effect of Nano Titanium Dioxide on Lactuca sativa
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The Fundamental Research Funds for the Central Universities ( No. 202210004009)

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    摘要:

    为了阐明纳米二氧化钛颗粒(TiO2NPs)对生菜(Lactuca sativa)生长的影响，采用自行设计的水培装置探究不同浓度TiO2NPs (300~1 200 mg/L)下，生菜生长和生理生化指标的变化。结果表明，300 mg/L TiO2NPs能促进生菜幼苗的根长、茎长、叶表面积、鲜重和干重；随着TiO2 NPs浓度增大，生菜的生长指标呈现下降趋势，但仍优于对照组。生菜体内的抗氧化酶(SOD、POD)在低TiO2 NPs浓度(300 mg/L)时，活性明显下降；随着TiO2 NPs浓度增大，这两种抗氧化酶活性逐渐增强。因此，生菜对TiO2NPs胁迫具有浓度依赖性，表现为“低促高抑”，且能够通过抗氧化酶系统来减轻TiO2NPs伤害。

    Abstract:

    In order to clarify the effect of nano titanium dioxide particles (TiO2 NPs) on growth of Lactuca sativa, the growth, physiological and biochemical indexes of L. sativa were studied treated with TiO2 NPs (300-1 200 mg/L) by using a self-designed hydroponic device. The results showed that the root length, stem length, leaf surface area, fresh weight and dry weight of seedlings increased treated with 300 mg/L TiO2 NPs. With the increasing of TiO2 NPs concentration, the growth indexes showed a downward trend, but still higher than those of the control group. The activities of antioxidant enzymes (SOD, POD) in L. sativa decreased significantly at low TiO2 NPs concen-tration (300 mg/L). With the increament of TiO2 NPs concentration, the activities of SOD, POD gradually increased. Therefore, it was suggested that L. sativa has a concentration-dependent effect on TiO2 stress, showing "promotion at low concentration and inhibition at high concentration". The damage of nanomaterials of L. sativa could be reduced by its antioxidant enzyme system.

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刘晓宇,张雪薇,戴昊鸣,陈斯琳,王梦华,张凯悦,王纪元,成喜雨,晏琼.纳米二氧化钛对生菜的生长效应分析[J].热带亚热带植物学报,2023,31(5):679~685

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  • 收稿日期:2022-06-01
  • 最后修改日期:2022-08-14
  • 录用日期:2022-09-30
  • 在线发布日期: 2023-09-26
  • 出版日期: 2023-09-20
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