The Relationship Between Bean Yellow Mosaic Virus and Pea Mosaic Virus.

Abstract

SummaryThe host range, symptomatology, serology, and electron microscopy of one isolate of bean yellow mosaic virus (BYMV) and of three isolates of pea mosaic virus (PMV1, PMV2, and PMV3) were compared. All had similar host ranges, but could be differentiated by symptomatology. BYMV, P.~VI, and PMV2 were closely related serologically.The normal particle length of PMVI was consistently in the range 787-800 mfL, whereas with BYMV it varied according to the host plant. From legumes it was within the range 742-756 mfL and from Chenopodium amaranticolor 794-800 mI" PMV2 and PMV3 had particles of similar length to PMVl.Morphological differences were observed between some particles of BYMV and PMVI from leguminous hosts, but not from C. amaranticolor. The pitfalls of using particle length measurements as a criterion of strain relationship are discussed. It is concluded that all the isolates should be regarded as strains of BYMV.

The identification of three new viruses isolated from Wisteria and Pisum in The Netherlands, and the problem of variation within the potato virus Y group

“…BMV was easily distinguished because of its shorter particle length. A complicating factor seems to be the unexpected influence of host species on particle length of BYMV B 25, as was earlier found for BYMV by Taylor and Smith (1968) (in legumes 742-756 m~ and in C. arnaranticolor 794-800 m~z). Extremely striking was the great length (about 840 m~z) and rigidity of virus particles of my pea mosaic virus isolates especially PMV E 198.…”

Changes Induced by Magnesium Ions in the Morphology of Some Plant Viruses with Filamentous Particles

“…The particles were indistinguishable from those of HMV extracted similarly and sap from the tobacco plant reacted specifically with an antiserum to HMV. The reports by Taylor & Smith (1968) and Bos (I97 o) of a hostdependent variation in the length of the particles of some bean yellow mosaic virus isolates may also be explained by different conditions in the saps of the different hosts.…”

Properties of viruses of the potyvirus group. 2. Buoyant density, S value, particle morphology, and molecular weight of the coat protein subunit of bean yellow mosaic virus, pea mosaic virus, lettuce mosaic virus, and potato virus YN

“…However, the degree of relationship within the group could not be assessed properly on the basis of these properties alone (Taylor and Smith, 1968;Bos, 1970). The development of a simple method to purify some viruses of the potyvirus group (Huttinga, 1973) enabled us to study some of their chemical and physical properties, which can be of help in assessing relationships.…”