Uptake and cellular distribution, in four plant species, of fluorescently labeled mesoporous silica nanoparticles
文献类型： 外文期刊
作者： Sun, Dequan 1 ; Hussain, Hashmath I. 1 ; Yi, Zhifeng 3 ; Siegele, Rainer 4 ; Cresswell, Tom 4 ; Kong, Lingxue 3 ; Cahi 1 ;
作者机构： 1.Deakin Univ, Sch Life & Environm Sci, Geelong, Vic 3217, Australia
2.Chinese Acad Trop Agr Sci, South Subtrop Crop Res Inst, Zhanjiang 524091, Guangdong, Peoples R China
3.Deakin Univ, Inst Frontier Mat IFM, Geelong Technol Precinct, Geelong, Vic 3216, Australia
4.Australian Nucl Sci & Technol Org ANSTO, Menai, NSW 2234, Australia
关键词： Mesoporous silica nanoparticles;Fluorescein isothiocyanate;Rhodamine isothiocyanate;Transmission electron microscopy
期刊名称：PLANT CELL REPORTS （ 影响因子：4.57； 五年影响因子：4.463 ）
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收录情况： SCI
摘要： We report the uptake of MSNs into the roots and their movement to the aerial parts of four plant species and their quantification using fluorescence, TEM and proton-induced x - ray emission (micro - PIXE) elemental analysis. Monodispersed mesoporous silica nanoparticles (MSNs) of optimal size and configuration were synthesized for uptake by plant organs, tissues and cells. These monodispersed nanoparticles have a size of 20 nm with interconnected pores with an approximate diameter of 2.58 nm. There were no negative effects of MSNs on seed germination or when transported to different organs of the four plant species tested in this study. Most importantly, for the first time, a combination of confocal laser scanning microscopy, transmission electron microscopy and proton-induced X-ray emission (micro-PIXE) elemental analysis allowed the location and quantification MSNs in tissues and in cellular and sub-cellular locations. Our results show that MSNs penetrated into the roots via symplastic and apoplastic pathways and then via the conducting tissues of the xylem to the aerial parts of the plants including the stems and leaves. The translocation and widescale distribution of MSNs in plants will enable them to be used as a new delivery means for the transport of different sized biomolecules into plants
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