Plant responses against invasive nucleic acids: RNA silencing and its suppression by plant viral pathogens
نویسندگان
چکیده
منابع مشابه
RNA based viral silencing suppression in plant pararetroviruses
The 35S promoter of cauliflower mosaic virus and that of other plant pararetroviruses gives rise to an RNA, which is both a pre-genome and a polycistronic mRNA. The 600 nucleotide long very structured leader of this RNA is also transcribed separately. The resulting 8S RNA is then converted to a double strand giving rise to a huge set of siRNAs, which suppress silencing. In this Mini-Review I di...
متن کاملRNA silencing and plant viral diseases.
RNA silencing plays a critical role in plant resistance against viruses, with multiple silencing factors participating in antiviral defense. Both RNA and DNA viruses are targeted by the small RNA-directed RNA degradation pathway, with DNA viruses being also targeted by RNA-directed DNA methylation. To evade RNA silencing, plant viruses have evolved a variety of counter-defense mechanisms such a...
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The frontline of plant defense against non-viral pathogens such as bacteria, fungi and oomycetes is provided by transmembrane pattern recognition receptors that detect conserved pathogen-associated molecular patterns (PAMPs), leading to pattern-triggered immunity (PTI). To counteract this innate defense, pathogens deploy effector proteins with a primary function to suppress PTI. In specific ca...
متن کاملPlant viral suppressors of RNA silencing.
RNA silencing is an ancient eukaryotic pathway in which double stranded RNA (dsRNA) triggers destruction of related RNAs in the cell. Early studies in plants pointed to a role for this pathway as a defense against viruses. Most known plant viruses have RNA genomes and replicate via dsRNA intermediates, thereby serving as potent inducers of RNA silencing early in replication and as silencing tar...
متن کاملDiagnosis of plant viral pathogens
In the last ten years there has been an explosion in plant virus outbreaks, because of either direct or indirect activities of humans. The ease of transporting plant materials and virus vectors, and collecting relatives of crop plants from the wild, has spread viruses widely throughout the world. The most important step in managing a virus disease is correct identification. Tests for diagnosis ...
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ژورنال
عنوان ژورنال: Seminars in Cell & Developmental Biology
سال: 2009
ISSN: 1084-9521
DOI: 10.1016/j.semcdb.2009.06.001