A new virus was isolated from a tomato plant from the state of Sinaloa in Mexico. This plant showed symptoms locally known as ‘marchitez disease’: severe leaf necrosis, beginning at the base of the leaflets, and necrotic rings on the fruits. A virus was isolated from the infected plant consisting of isometric particles with a diameter of approximately 28 nm. The viral genome consists of two (+)ssRNA molecules of 7221 (RNA1) and 4898 nts (RNA2). The viral capsid contains three coat proteins of 35, 26 and 24 kDa, respectively. The abovementioned characteristics: symptoms, morphology, number and size of coat proteins, and number of RNAs are similar to those of the previously described tomato torrado virus (ToTV). Sequence analysis of the entire viral genome shows that this new virus is related to, but distinct from, ToTV and that these members of two obviously new virus species belong to the recently proposed plant virus genus Torradovirus. For this new virus, the name tomato marchitez virus (ToMarV) is proposed.
Archives of Virology – Springer Journals
Published: Jan 1, 2008
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