Pathogenic viruses and viral vectors in plants: A comprehensive review

Abstract

Viruses are extremely small obligate molecular parasites that can be seen only with an electron microscope. In plant pathology there are the organisms named plant viral vectors whose task is to transmit pathogens. Transmission of vector can be mechanical and insect that present two pathways which allow the spreading of plant virus particles. Plant virologists with other association in molecular biology and plant pathology nominated top 10 viruses based on scientific and economic importance. This paper reviews the current standing of most known antiviral defense mechanism called RNA silencing and most known molecular diagnostic method in plant pathology, polymerase chain reaction (PCR).