Physiology and Molecular Biology of Plants ( IF 3.5 ) Pub Date : 2021-09-21 , DOI: 10.1007/s12298-021-01050-x Hanieh Mohajjel Shoja 1 , Laleh Ahmadi 1 , Maryam Kolahi 2 , Elham Mohajel Kazemi 1
Rapid commercialization, industrialization and the use of nanotechnology has led to an increase in the distribution of nanoparticles (NPs) in the environment. The most common metal oxide NPs which is present within products is Titanium dioxide (TiO2). TiO2 NPs have photocatalytic nature and can affect plant growth. The current study investigated the morphological, anatomical and biochemical features of Baby sun rose (Aptenia cordifolia) after exposure to different concentrations of TiO2 nanoparticles (0, 1, 5, 10 and 20 mg L−1). Treatment with TiO2 NPs showed changes in the morphological features and increased photosynthetic pigmentation within the plant. An increase in the level of phenolics (12%) and flavonoid compounds (13%) was observed when plants were treated with moderate levels of TiO2 NPs. A reduction in the diameter of the vascular bundles and increased thickening of the transverse wall were observed in several samples. The number of scattered vascular bundles in the stems increased. The morphological, biochemical, and anatomical responses of Baby sun rose indicates that plants can adapt to environments contaminated with up to 20 mg L−1 TiO2 NPs. The cultivation of Baby sun rose plants in environments polluted with TiO2 NPs is recommended. This study enhances the knowledge of the effect of TiO2 NPs on the growth of Baby sun rose which is an ornamental plant, widely cultivated in different regions of Iran. The results of this study suggest that contaminated environments up to 20 mg L−1 TiO2 NPs can be managed by phytoremediation. Further studies are needed to investigate this plant's tolerance strategies against stress caused by TiO2 NPs and bulk TiO2 as well as the effect of other nanoparticles on plant.
中文翻译:
纳米二氧化钛对小太阳玫瑰(Aptenia cordifolia)生长、解剖特征和生化参数的影响
纳米技术的快速商业化、工业化和使用导致纳米颗粒(NP)在环境中的分布增加。产品中最常见的金属氧化物纳米颗粒是二氧化钛 (TiO 2 )。TiO 2 NPs具有光催化性质,可以影响植物生长。本研究调查了太阳玫瑰花(Aptenia cordifolia)暴露于不同浓度的TiO 2纳米颗粒(0、1、5、10和20 mg L -1)后的形态、解剖和生化特征。TiO 2 NPs处理显示出形态特征的变化以及植物内光合色素沉着的增加。当用中等水平的 TiO 2 NP处理植物时,观察到酚类 (12%) 和类黄酮化合物 (13%) 的水平增加。在几个样品中观察到维管束直径的减小和横壁的增厚。茎中散在的维管束数量增多。太阳玫瑰的形态、生化和解剖学反应表明,植物可以适应被高达 20 mg L -1 TiO 2 NP污染的环境。建议在被 TiO 2 NPs污染的环境中种植太阳玫瑰植物。这项研究加深了人们对 TiO 2 NPs 对太阳玫瑰生长影响的认识,太阳玫瑰是一种观赏植物,在伊朗不同地区广泛种植。这项研究的结果表明,高达 20 mg L -1 TiO 2 NP 的污染环境可以通过植物修复进行管理。需要进一步的研究来调查该植物对 TiO 2 NP 和块状 TiO 2引起的胁迫的耐受策略以及其他纳米颗粒对植物的影响。