KMID : 0880220080460050502
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Journal of Microbiology 2008 Volume.46 No. 5 p.502 ~ p.507
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Generation of Infectious Transcripts from Korean Strain and Mild Mottle Strain of Potato Virus X
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Choi Sun-Hee
Ryu Ki-Hyun
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Abstract
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Full-length cDNAs of two different strains of Potato virus X (PVX-Kr and PVX-Mo) have been directly amplified by long template reverse transcription polymerase chain reaction (RT-PCR) using the 5¡¯-end primer containing a SP6 or T7 RNA promoter sequence and the virus-specific 3¡¯-end primer, and then constructed in plasmid vectors. Capped in vitro transcripts from cloned full-length cDNAs as well as those RTPCR amplicons proved to be infectious systemically on tobacco plants. Symptom expression on tobacco plants from PVX-Mo transcripts was faster and severer than that from PVX-Kr. In replication stability test of transcripts derived from PVX clones, progeny viruses showed stable replication according to sequencing through passages. This highly infectious transcript system from the full-length cDNA clones for PVX can be useful for recombinant molecules for functional analysis of viral proteins in plant-virus interaction study as well as for expression of foreign protein in planta.
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KEYWORD
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Potato virus X, in vitro transcription, infectious cDNA clone, plant virus, mild mottle strain, Korean strain
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