Some Observations on the Shape and Localization of Different Viruses in Experimentally Infected Plants, and on the Fine structure of the Host Cells IV. — Arabis Mosaic Virus inPetunia HybridaHort

Abstract

Fragments of mottled leaves from Petunia hybrida Hort., experimentally infected with AMV, were examined in the electron microscope. The virus infection causes a disarrangement of the chloroplast grana and intergana lamellae, which, instead of being regularly aligned along the longer axis of the plastidium, form variously oriented bendings. Also, the infection causes a proliferation of membranes and tubules in the cytoplasm. AMV particles are visible in the phloem elements of the leaf veins, where they aggregate in concentric layers.