Fig. 5
From: Silica nanoparticles protect rice against biotic and abiotic stresses
TEM observation of SiO2 NPs distribution in rice roots through root treatment. Roots of the 2-week-old rice seedlings were exposed to 3000Â mg/L of SiO2 NPs treated for 1Â day before observation. Ep stands for epidermis, Ex stands for exodermis, En stands for endodermis. The boxes with dashed and solid lines represent the magnification of the part. A Outer part of the rice root. Massive nanoparticles accumulated outside the root epidermis and only some of them could be absorbed into the inner side of epidermis. B Inner part of the rice root. SiO2 NPs could be transported through the root air spaces