Abstract

Cerium oxide nanoparticles (nCeO₂) have extensive industrial applications, and concerns regarding their threat to the environment have been raised. This study includes structural analysis of intact root xylem of rice (Oryza sativaL.), wheat (Triticum aestivumL.), and barley (Hordeum vulgareL.) seedlings exposed to nCeO₂ suspensions (0, 62.5, 125, 250, and 500 mg L⁻¹). Fourier transform infrared microspectroscopy was applied to determine compositional alterations in the root xylem, and principal component analysis (PCA) was carried out to examine spectral differences between nCeO₂ treatments. Results demonstrated that nCeO₂ at ≥ 125 mg L⁻¹ changed the region of spectra around 1696-1760 cm⁻¹ in rice root, 125 and 250 mg L⁻¹ modified 1744-1792 cm⁻¹ in wheat, and 62.5 and 125 mg L⁻¹ altered 1727-1760 cm⁻¹ in barley. PCA afforded the clustering of nCeO₂ treatments at 0 and 62.5 mg L⁻¹ in rice and wheat and 0 and 500 mg L⁻¹ in barley. Furthermore, major peaks at 1744 or 1760 cm⁻¹ appeared in primary PC and 1728 cm⁻¹ in secondary PC score loadings. These findings illustrated that nCeO₂ induced compositional modifications in the root xylem of cereals.

Prediction of heavy metal Cd and stress on minerals in rice by analysis of LIBS spectra

Gangrong Fu, Zhongxiu Li, Jiang Xu, Weiping Xie, Ping Yang, Yuan Xu, and Mingyin Yao
Appl. Opt. 61(10) 2536-2541 (2022)

Fourier transform infrared transmission microspectroscopy of photonic crystal structures

Gregory R. Kilby and Thomas K. Gaylord
Appl. Opt. 48(19) 3716-3721 (2009)

Identification of wheat quality using THz spectrum

Hongyi Ge, Yuying Jiang, Zhaohui Xu, Feiyu Lian, Yuan Zhang, and Shanhong Xia
Opt. Express 22(10) 12533-12544 (2014)

Effect of fluorescence characteristics and different algorithms on the estimation of leaf nitrogen content based on laser-induced fluorescence lidar in paddy rice

Jian Yang, Jia Sun, Lin Du, Biwu Chen, Zhenbing Zhang, Shuo Shi, and Wei Gong
Opt. Express 25(4) 3743-3755 (2017)

Assessing frost damage in barley using terahertz imaging

Wendy S. L. Lee, Ariel Ferrante, Withawat Withayachumnankul, and Jason A. Able
Opt. Express 28(21) 30644-30655 (2020)