Efficient translation of Eggplant mottled dwarf nucleorhabdovirus N and X genes requires both 5' and 3' UTRs.

Background: Circularization of RNA mediated by association of translation factors and RNA elements in 5' and 3' UTRs is a common feature for translation control in eukaryotes. There is no information about translation in plant rhabdoviruses and little information is known in animal rhabdoviruses.

Methods: The role of 5' and 3' UTRs in two genes of EMDV in translation were studied using luciferase constructs and RNA structures of these sequences were analyzed by SHAPE and Inline probing.

Comparative transmission of two cucumber mosaic virus isolates by two color morphs of Acyrthosiphon pisum (Harris).

Unlabelled:  Cucumber mosaic virus (CMV) is one of the most important legume-infecting viruses, which is transmitted effectively by pea aphid Acyrthosiphon pisum (Harris) (Hem: Aphididae). Transmission efficiency of two CMV isolates (As and Kh from cowpea and bean hosts, resp.) by red and green color morphs of pea aphid were evaluated on bean plants.

Characterization of a filamentous virus from Bermuda grass and its molecular, serological and biological comparison with Spartina mottle virus.

Bermuda grass with mosaic symptoms have been found in many parts of Iran. No serological correlation was observed between two isolates of this filamentous virus and any of the members of the family Potyviridae that were tested. Aphid transmission was demonstrated at low efficiency for isolates of this virus, whereas no transmission through seed was observed.

Identification of Three Strains of Bean common mosaic necrosis virus in Common Bean from Iran.

Bean common mosaic virus (BCMV; genus Potyvirus) has been recognized as a major constraint on bean production in Iran. BCMV and Bean common mosaic necrosis virus (BCMNV) have been reported from bean-growing regions of Iran (2,3), but no attempts were made to differentiate strains of BCMNV. During the early growing seasons of 2003 and 2004, 141 bean leaf samples suspected of BCMV infection were collected from the main bean-producing regions in Tehran Province (Varamin, Damavand, Boein Zahra, Hashtgerd, and Karaj).

Virus diseases in the tobacco fields of Guilan and Western Azerbaijan provinces of Iran.

Tobacco (Nicotiana tabacum L.) is one of the important industrial plants in Iran. Viruses as an important group of plant pathogens cause many losses on the quality and quantity of tobacco crop.