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Viroid - Wikipedia
Viroids are small single-stranded, circular RNAs that are infectious pathogens. [1][2] Unlike viruses, they have no protein coating. All known viroids are inhabitants of angiosperms (flowering plants), [3] and most cause diseases whose economic importance to humans varies widely. [4] .
Viroid | plant disease, RNA, pathogen | Britannica
viroid, an infectious particle smaller than any of the known viruses, an agent of certain plant diseases. The particle consists only of an extremely small circular RNA (ribonucleic acid) molecule, lacking the protein coat of a virus. Viroids appear to be transmitted mechanically from one cell to another through cellular debris.
6.4: Viroids, Virusoids, and Prions - Biology LibreTexts
Apr 21, 2024 · Viroids consist only of a short strand of circular RNA capable of self-replication. The first viroid discovered was found to cause potato tuber spindle disease, which causes slower sprouting and various deformities in potato plants (see Figure \(\PageIndex{1}\)).
Viroids and the Origin of Life - PMC
Viroids are non-coding circular RNA molecules with rod-like or branched structures. They are often ribozymes, characterized by catalytic RNA. They can perform many basic functions of life and may have played a role in evolution since the beginning of life on Earth. They can cleave, join, replicate, and undergo Darwinian evolution.
Viroid - an overview | ScienceDirect Topics
Viroids are small, single-stranded, circular RNAs that can infect plants and cause specific diseases, even though they do not have the ability to code for proteins. They belong to the taxonomic families of Pospiviroidae and Avsunviroidae, which differ in their structural and functional properties.
4.6.2: Viroids - Biology LibreTexts
Sep 13, 2023 · Virusoids are circular single-stranded RNAs dependent on plant viruses for replication and encapsidation. The genome of virusoids consists of several hundred nucleotides and only encodes structural proteins. Virusoids are …
Viroids Definition, Infection, Structure, Examples, Diagnostic, …
Apr 14, 2024 · Viroids are known as the smallest infectious pathogens which are made up solely of a short strand of circular, single-stranded self-replicating RNA that has no protein coating. Although, viroids are made of nucleic acid which does not code for any protein. They don’t contain any protein coat to protect their genetic information.
Understanding viroids, endogenous circular RNAs, and viroid-like …
Jun 27, 2024 · Viroids are a group of noncoding subviral RNAs that infect plant hosts. Currently, there are 44 formal viroid species grouped into 2 families, 39 members in Pospiviroidae, and 5 members in Avsunviroidae [1].
Viroids-Structure, Characteristic Features and their Disorders
Viroids are infectious diseases causing pathogens that affect only plants. They are smaller than Viruses and other pathogens. Explore more about Viroids at BYJU'S.
Viroids - Biology Reader
Viroids refer to the small, non-cellular sub-viral agents, which exist as obligate intracellular parasites like viruses, but differs in property by lacking a protein coat. They are approximately 200-400 nucleotides long. Viroid primarily infects, replicates and …