The relationship between sugar-cane mosaic virus and mosaic viruses of maize and Johnson grass in Australia

Abstract

Two isolates of maize dwarf mosaic virus originating from maize (MDMV(M)) and Johnson grass (MDMV(J)) were distantly related to an Australian and a Californian strain of sugar-cane mosaic virus (SMV). MDMV(M) was shown to be distantly related serologically to a Californian strain but not to an Ohio strain of MDMV; MDMV(J) was not shown to be related serologically to either the Californian or the Ohio strain of MDMV. MDMV(M), MDMV(J), and the Australian SMV produced similar symptoms on sweet corn (Zea mays var. saccharata (Sturtev)), which under glasshouse conditions included an initial necrotic phase not previously described for MDMV. The three isolates showed different characteristics when purified from sweet corn by an identical procedure. The yields of MDMV(M) and MDMV(J) were higher than that of SMV, and these two isolates produced strong zones in density gradients whereas SMV produced a very weak zone. The normal length of MDMV(M) was 773 ± 6.35 mµ and that of MDMV(J) 778 ± 6.35 mµ and the particles of both were uniform. By contrast the particles of SMV were very uneven in length; the most common length was 650–750 mµ, but many longer and shorter particles were observed.

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

“…A somewhat similar difference between BYMV (about 750 m~z) and pea mosaic virus (about 790-800 m~) was found by Taylor and Smith (1968), who nevertheless concluded that they were strains of one virus. A less pronounced difference in particle length between a sorghum isolate (784 m~x) and a surgarcane isolate (753 m~) of the sugarcane mosaic virus (yon Wechmar and Hahn, 1967) and between this virus (uneven length 650-750 m~) and maize dwarf mosaic virus (775 m~z) (Taylor and Pares, 1968) was also not considered to be sufficient to warrant the iselates concerned being regarded as different viruses. However, the great length and rigidity of PMV E 198 necessitates reconsideration of the identity of this pea mosaic virus isolate, and of the bearing of particle length on virus classification.…”

Identification of differentially regulated maize proteins conditioning Sugarcane mosaic virus systemic infection

“…Maize dwarf mosaic disease (MDMD) is one of the most common and devastating diseases affecting maize. Several RNA viruses, including Maize dwarf mosaic virus , Sugarcane mosaic virus (SCMV), Johnsongrass mosaic virus , Zea mosaic virus , Pennisetum mosaic virus and Sorghum mosaic virus can cause MDMD (Janson & Ellett, ; Williams & Alexander, ; Taylor & Pares, ; Shukla et al ., ; Seifers et al ., ; Fan et al ., ). All of these viruses belong to the genus Potyvirus , family Potyviridae (Hollings & Brunt, ; Adams et al ., ).…”

Coat protein of potyviruses

“…It occurs in many parts of the world where susceptible species are grown. A large number of SCMV strains have been reported from different parts of the world (3,5,16,17,22,23,24,29,32), and these were differentiated on the basis of host, reactions and serological tests. A large number of SCMV strains have been reported from different parts of the world (3,5,16,17,22,23,24,29,32), and these were differentiated on the basis of host, reactions and serological tests.…”