A Satellitelike Virus Particle Associated with Maize White Line Mosaic Virus

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Abstract
A satellite-like virus (SV) particle (isometric, 17 nm in diameter) was found in maize white line mosaic virus(MWLMV)-infected maize plants. The SV was serologically unrelated to MWLMV, to the satellite virus of tobacco necrosis virus, and to the satellite-like particle associated with panicum mosaic virus, but the SV was serologically related to a satellite-like particle associated with maize dwarf ringspot virus, a virus from France that is serologically related to MWLMV. The roots of all 34 MWLMV-infected plants examined also contained SV. The leaves of these plants had no particles, both particles, or only MWLMV, but never SV alone. Yields of purified SV from maize roots and leaves were usually 300-500 .mu.g/g of tissue. The SV had a sedimentation coefficient of 48S, a buoyant density in CsCl of 1.355 g/ml, a 24.7-kdalton coat protein and a single-stranded RNA genome with an MW of 0.44 .times. 106. As with MWLMV, the SV could be transmitted to healthy maize plants only by growing the plants in soils that had previously contained SV-infected maize plants.