viroid


viroid
/vuy"royd/, n.
an infectious agent of plants similar to a virus but consisting of only a short, single strand of RNA without a protein coat.
[1946; VIR(US) + -OID]

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Infectious particle that is smaller than any of the known viruses.

The particle consists of an extremely small circular RNA molecule that lacks the protein coat of a virus. Viroids appear to be transmitted mechanically from one cell to another through cellular debris. They are of much interest because of their subviral nature and their unknown mode of action. Viroids are agents of certain plant diseases; whether they occur in animal cells is uncertain.

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▪ viral structure
      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. Viroids are of much interest because of their subviral nature and their obscure mode of action. Potato spindle tuber disease is viroid-induced. Whether viroids occur in animal cells is still uncertain.

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Universalium. 2010.

Look at other dictionaries:

  • viroid — viroid. См. вироид. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Viroid — Viroid, aus capsid und hüllenloser, ringförmiger, einsträngiger RNA bestehendes Partikel mit der Fähigkeit, lebende Zellen zu infizieren und sich in ihnen zu vermehren. Die RNA besteht aus etwa 350 Nucleotiden, die teilweise gepaart sind. Die V.… …   Deutsch wörterbuch der biologie

  • viroid — [vī′roid] n. a viruslike plant pathogen consisting of a short strand of genetic material (RNA) without a protein coating …   English World dictionary

  • Viroid — Taxobox color = violet virus group = unranked classis = Subviral agents unranked ordo = Viroid subdivision ranks = Families subdivision = Pospiviroidae Avsunviroidae Viroids are plant pathogens that consist of a short stretch (a few hundred… …   Wikipedia

  • Viroid — Viroide sind die kleinsten bekannten Krankheitserreger und bestehen aus nur einer ringförmig geschlossenen, einzelsträngigen Ribonukleinsäure (RNA). Im Gegensatz zu Viren besitzen Viroide keine zusätzlichen Proteine oder Lipide in Form einer… …   Deutsch Wikipedia

  • Viroid — Вироиды  это патогены растений, которые состоят из короткого фрагмента (несколько сотен нуклеотидов) высококомплементарной, кольцевой, одноцепочечной РНК, не покрытой белковой оболочкой, характерной для вирусов. Считается, что вироиды… …   Википедия

  • viroid — An infectious pathogen of plants that is smaller than a virus (MW 75,000–100,000) and differs from one in that it consists only of single stranded closed circular RNA, lacking a protein covering (capsid); replication does not depend on a helper… …   Medical dictionary

  • Viroid — viroidas statusas Aprobuotas sritis augalininkystė apibrėžtis Infekcinių medžiagų klasei priklausantis agentas, kurį sudaro nedidelė RNR seka, nesusijusi nė su vienu baltymu. RNR nekoduoja baltymų ir neperduoda informacijos baltymui; ją atkartoja …   Lithuanian dictionary (lietuvių žodynas)

  • viroid — viroidas statusas Aprobuotas sritis augalininkystė apibrėžtis Infekcinių medžiagų klasei priklausantis agentas, kurį sudaro nedidelė RNR seka, nesusijusi nė su vienu baltymu. RNR nekoduoja baltymų ir neperduoda informacijos baltymui; ją atkartoja …   Lithuanian dictionary (lietuvių žodynas)

  • viroid — viroidas statusas T sritis augalininkystė apibrėžtis Ligas sukeliantis mikroorganizmas, turintis žiedinę viengrandę iš 270–3870 nukleotidų sudarytą RNR molekulę. atitikmenys: angl. viroid rus. вироид …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas


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