Viroid

Definition

Viroids are small single-stranded, circular RNAs that are infectious pathogens. Unlike viruses, they have no protein coating. All known viroids are inhabitants of angiosperms, and most cause diseases, whose respective economic importance to humans varies widely. A 2023 metatranscriptomics study suggests that viroids and viroid-like elements can be found in all domains of life.

Related concepts

Abiogenesis Adnaviria Agricultural biosecurity inspection Agricultural economics Agricultural quarantine Alphasatellitidae Ambiviricota Ambivirus Ami Bhatt Ampullaviridae Andrew Fire Angiosperms Animal Antonie van Leeuwenhoek Aphid Apicoplast Apscaviroid Apscaviroid betadiospyri Apscaviroid betaflavivitis Apscaviroid cicatricimali Apscaviroid curvifoliumcitri Apscaviroid dendrobii Apscaviroid diospyri Apscaviroid epsiloncitri Apscaviroid etacitri Apscaviroid fossulamali Apscaviroid japanvitis Apscaviroid latenspruni Apscaviroid latensvitis Apscaviroid litchis Apscaviroid maculamali Apscaviroid nanocitri Apscaviroid pustulapyri Apscaviroid zetacitri Archaea Artificial cell Australian grapevine viroid Avocado sunblotch viroid Avsunviroid Avsunviroidae Bacteria Bacteriome Bartogtaviriformidae Basaltiviridae Base pairing Bicaudaviridae Bio-like structure BioRxiv Biological dark matter Biosphere Brachygtaviriformidae CRISPR Cancer cell Capsid Carl Zimmer Catalytic Cell (biology)Cell division Chloroplast Chloroplasts Chromoplast Chromosome Circular RNA Circular chromosome Citrus III viroid Citrus exocortis Clavaviridae Clonally transmissible cancer Coacervate Cocadviroid Cocadviroid rimocitri Cocadviroid tinangajae Coconut cadang-cadang viroid Coleviroid Coleviroid alphacolei Coleviroid betacolei Coleviroid epsiloncolei Coleviroid gammacolei Coleviroid zetacolei Colicin Cosmid Cytosine DNA DNA repair DNA replication DNA transposon DNA virus Daniel Mazia Defective interfering particle Dicer Dinodnavirus Diversity-generating retroelement Dmitri Iosifovich Ivanovsky Double-stranded RNA viruses DsDNA-RT virus Duplodnaviria ELISA EPPO Code Earliest known life forms Efunaviria Elaviroid Elaviroid latensmelongenae Encyclopedia of Life Endogenous retrovirus Endogenous viral element Endosymbiont Episome Eukaryote Eurekaviridae Extrachromosomal DNA Fertility factor (bacteria)Floreoviria Fosmid Francevillian biota Fungal prion Fungi Fungus Fuselloviridae Gene Gene duplication Genetic recombination Genome Genomic island Gerontoplast Giant virus Globuloviridae Grapevine yellow speckle viroid 1 Group II intron Group I catalytic intron Guanine Guttaviridae Hairpin RNA Halspiviridae HeLa Helper dependent virus Helper virus Hepatitis D Homology (biology)Hop latent viroid Hop stunt viroid Horizontal gene transfer Hostuviroid Hostuviroid latensdahliae Huangdiviridae Human microbiome Hydrogenosome Incertae sedis Integrative and conjugative element International Committee on Taxonomy of Viruses Interspersed repeat Intron Itzamnaviridae Jeewanu Kappa organism LUCA Last universal common ancestor Leucoplast Life Linear chromosome Lomiviridae Martinus Beijerinck Messenger RNA Metatranscriptomics Mexican papita viroid Microbial dark matter Microparasite Microparticle Mitochondrion Mitosome Mobile genetic elements Mobilome Model lipid bilayer Movement proteins Mycoplasma laboratorium Naldaviricetes Nanobacterium Nanobe National Center for Biotechnology Information New York Times Nipumfusiviridae Nitroplast Non-cellular life Non-coding DNA Nucleic acid Nucleic acid hybridization Nucleic acid secondary structure Obelisk (biology)Obscuriviridae Order (taxonomic rank)Organelle Organism Origin of replication Orthornavirae Ovaliviridae Parakaryon Pararetrovirus Peach latent mosaic viroid Pelamoviroid Pelamoviroid maculachrysanthemi Pelamoviroid malleusmali Phagemid Phytosanitary inspection Plant Plant pathology Plasmaviridae Plasmid Plasmodesmata Plastid Pleomoviria Polydnaviriformidae Polymerase chain reaction Portogloboviridae Pospiviroid Pospiviroid alphairesinis Pospiviroid apicimpeditum Pospiviroid chloronani Pospiviroid impedichrysanthemi Pospiviroid latenscolumneae Pospiviroid latensportulacae Pospiviroid machoplantae Pospiviroid parvicapsici Pospiviroidae Potato spindle tuber viroid Prion Prokaryote Prokaryotes Prophage Protein Proteinoid Protist Protocell Protozoa Provirus R-factor RNA-dependent RNA polymerase RNA-induced silencing complex RNA polymerase II RNA silencing RNA virus RNA world RNA world hypothesis Repeated sequence (DNA)Replicon (genetics)Retron Retroposon Retrotransposon Retroviroid Retrovirus Retrozyme Reverse transcriptase Reverse transcriptase-related cellular gene Rhizidiovirus Rhodogtaviriformidae Ribosome Riboviria Ribozyme Ribozymes Ribozyviria Rolling circle Satellite (biology)Satellite RNA ScienceAlert Secondary chromosome Self-replication Sequence homology Singelaviria Small interfering RNA Spiegelman's Monster Spiraviridae Subviral agents Sulphobes Symptom Synthetic virology Tandem repeat Telomerase reverse transcriptase Thaspiviridae Theodor Otto Diener Ti plasmid Tolecusatellitidae Transgenic Transposable element Transpoviron Trophosome Two-domain system Varidnaviria Vendobionta Viral vector Viriform Virome Virophage Virulence Virulence factor Virus Virus classification Virusoid Virusoids Volvereviria Wikidata Wikispecies Xenobot Xigoviridae Yamazakiviridae

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