Retention of the virus-derived sequences in the nuclear genome of grapevine as a potential pathway to virus resistance.

ABSTRACT:

Background

Previous studies have revealed a wide-spread occurence of the partial and complete genomes of the reverse-transcribing pararetroviruses in the nuclear genomes of herbaceous plants. Although the absence of the virus-encoded integrases attests to the random and incidental incorporation of the viral sequences, their presence could have functional implications for the virus-host interactions.

Hypothesis

Analyses of two nuclear genomes of grapevine revealed multiple events of horizontal gene transfer from pararetroviruses. The approximately 200-800 bp inserts that corresponded to partial ORFs encoding reverse transcriptase apparently derived from unknown or extinct caulimoviruses and tungroviruses, were found in 11 grapevine chromosomes. In contrast to the previous rep

SUBMITTER: Bertsch C 

PROVIDER: S-EPMC2714080 | biostudies-literature | 2009 Jun

REPOSITORIES: biostudies-literature