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Organelle Imaging with Terahertz Scattering-Type Scanning Near-Field Microscope
Huang, Jie1; Wang, Jie2,5; Guo, Linghui3; Wu, Dianxing1; Yan, Shihan2; Chang, Tianying4; Cui, Hongliang2,4
2023-09-01
摘要Organelles play core roles in living beings, especially in internal cellular actions, but the hidden information inside the cell is difficult to extract in a label-free manner. In recent years, terahertz (THz) imaging has attracted much attention because of its penetration depth in nonpolar and non-metallic materials and label-free, non-invasive and non-ionizing ability to obtain the interior information of bio-samples. However, the low spatial resolution of traditional far-field THz imaging systems and the weak dielectric contrast of biological samples hinder the application of this technology in the biological field. In this paper, we used an advanced THz scattering near-field imaging method for detecting chloroplasts on gold substrate with nano-flatness combined with an image processing method to remove the background noise and successfully obtained the subcellular-grade internal reticular structure from an Arabidopsis chloroplast THz image. In contrast, little inner information could be observed in the tea chloroplast in similar THz images. Further, transmission electron microscopy (TEM) and mass spectroscopy (MS) were also used to detect structural and chemical differences inside the chloroplasts of Arabidopsis and tea plants. The preliminary results suggested that the interspecific different THz information is related to the internal spatial structures of chloroplasts and metabolite differences among species. Therefore, this method could open a new way to study the structure of individual organelles.
关键词chloroplast THz imaging s-SNOM Arabidopsis thaliana Camellia sinensis flavonoid
DOI10.3390/ijms241713630
发表期刊INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
ISSN1661-6596
卷号24期号:17页码:16
通讯作者Yan, Shihan(yanshihan@cigit.ac.cn) ; Chang, Tianying(ty.chang@siat.ac.cn)
收录类别SCI
WOS记录号WOS:001064142700001
语种英语