Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology , Sector H-12, Islamabad 44000, Pakistan.
College of Pharmacy, Chung-Ang University , Seoul 06974, Republic of Korea.
J Agric Food Chem. 2017 Jul 19;65(28):5598-5606. doi: 10.1021/acs.jafc.7b01843. Epub 2017 Jul 7.
Plants have the natural ability to withstand stress conditions through metabolic adjustments. The present study aimed at investigating the effects of titanium dioxide nanoparticles (TiO NPs) application (0, 25, 50, 150, 250, 500, and 750 mg kg) in phosphorus-deficient soil in terms of growth responses, P contents, and metabolic alterations in rice. TiO NPs application increased shoot length up to 14.5%. Phosphorus contents in rice roots, shoots, and grains were increased by 2.6-, 2.4-, and 1.3-fold, respectively, at 750 mg kg of TiO NPs. Gas chromatography-mass spectrometry (GC-MS)-based metabolomics revealed increased levels of amino acids, palmitic acid, and glycerol content in grains resulting from plants grown in 750 mg kg TiO NPs-treated soil. Furthermore, no translocation of TiO NPs from the treated soil to rice grains was detected by inductively coupled plasma-optical emission spectrometry (ICP-OES), which suggests no risk of TiO NPs intake via grain consumption. The observed data indicates the strong relationship among NPs application, P contents, and metabolic alterations.
植物具有通过代谢调整来耐受应激条件的天然能力。本研究旨在调查在缺磷土壤中应用二氧化钛纳米颗粒（TiO NPs）（0、25、50、150、250、500 和 750 mg kg）对水稻生长反应、磷含量和代谢变化的影响。TiO NPs 的应用使水稻的茎长增加了 14.5%。在 750 mg kg TiO NPs 处理的土壤中，水稻根系、茎和籽粒中的磷含量分别增加了 2.6、2.4 和 1.3 倍。基于气相色谱-质谱联用（GC-MS）的代谢组学分析表明，在 750 mg kg TiO NPs 处理的土壤中生长的植物，其籽粒中的氨基酸、棕榈酸和甘油含量增加。此外，电感耦合等离子体发射光谱（ICP-OES）未检测到 TiO NPs 从处理土壤向水稻籽粒的迁移，这表明通过食用谷物摄入 TiO NPs 的风险较低。观察到的数据表明 NPs 应用、磷含量和代谢变化之间存在很强的关系。
