A virus associated with a mosaic disease in melons in the Ourmia district in northern Iran was mechanically transmissible to a wide range of test plants but was not transmitted using aphids, the whitefly Trialeurodes vaporariorum or the mite Tetranychus urticae. Its rather stable particles somewhat resembled those of both geminiviruses and alfalfa mosaic virus; they were 18-5 nm in mean width, parallelsided, and of severa1 discrete lengths, 30 nm and 37 nm being the shortest and commonest lengths. Both ends of al1 particles were sharply triangular in profile. The particles contained linear single-stranded RNA of three sizes, estimated as 0-91,O-35 and 0.32, al1 x lo6 molecular weight, and two coat proteins of 26.3 and 23.3 x lo3 estimated molecular weight. The virus, named Ourmia melon virus, appears to be the first described representative of a new virus group.
Ourmia melon virus, a virus from Iran with novel properties.
ACCOTTO;G P;CACIAGLI P;
1988
Abstract
A virus associated with a mosaic disease in melons in the Ourmia district in northern Iran was mechanically transmissible to a wide range of test plants but was not transmitted using aphids, the whitefly Trialeurodes vaporariorum or the mite Tetranychus urticae. Its rather stable particles somewhat resembled those of both geminiviruses and alfalfa mosaic virus; they were 18-5 nm in mean width, parallelsided, and of severa1 discrete lengths, 30 nm and 37 nm being the shortest and commonest lengths. Both ends of al1 particles were sharply triangular in profile. The particles contained linear single-stranded RNA of three sizes, estimated as 0-91,O-35 and 0.32, al1 x lo6 molecular weight, and two coat proteins of 26.3 and 23.3 x lo3 estimated molecular weight. The virus, named Ourmia melon virus, appears to be the first described representative of a new virus group.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
