Inclusions in Mesophyll Cells induced by a Virus causing Chlorotic Streaks on Leaves of Allium porrum L.

The ultrastructure of plant cells infected with viruses of the potyvirus group has received considerable attention during the last few years. The same types of inclusions are induced by these viruses in many different hosts. They include dense bands, bundles, laminated aggregates, pinwheels, star-like inclusions, loops, single or multilamellar rings or circles and fibrous masses. These structures are sections of three dimensional shaped inclusions, described as laminated aggregates, cylindrical inclusions, tubes or scrolls, plates, crystals and aggregates of virus particles. The subject has been reviewed by EDWARDSON and PURCIFULL (1968) and by WEINTRAUB and RAGETLI (1970). The chemical composition of isolated inclusions has been discussed by SHEPARD (1968), WEINTRAUB and RAGETLI (1968), SHEPARD and SHALLA (1969), HIEBERT et al. (1971) and HIEBERT and MCDONALD (1973). ;