Abstract
The ultrastructure of mesophyll cells of Chenopodium quinoa Willd. infected with artichoke mottled crinkle virus (AMCV) was investigated with the electron microscope. The cytoplasm of altered cells contained complex multivesicular bodies orginating from arrangement of endoplasmic reticulum membranes, small vesicles, and electron opaque granular material into a pseudo-organellar form. Structural modifications of chloroplasts but not of mitochondria were noticed. The nuclei exhibited prominent membranous inclusions and contained a few virus particles. AMCV particles were occasionally associated with chloroplasts and were plentiful in the cytoplasm, where they occurred in a loosely disperse fashion or in crystalline aggregates. Virions were found also in the central vacuole either free or in vesicular cytoplasmic extrusions.
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