Pospiviroidae
Mostrando 1-9 de 9 artigos, teses e dissertações.
-
1. Espécies de viróides associadas a caneluras nos ramos em limeira ácida 'Tahiti' no Estado de São Paulo, Brasil
Os viroides têm sido empregados em diversos países como agentes indutores de nanismo transmissíveis por enxertia ("graft transmissible dwarfing agents", GTDA), principalmente visando à diminuição do porte das plantas, o que permite o adensamento do pomar. No Estado de São Paulo, Brasil, plantas de limeira ácida 'Tahiti' são normalmente enxertadas co
Tropical Plant Pathology. Publicado em: 2010
-
2. Viroides em citros
Os viroides são os menores fitopatógenos conhecidos. Constituídos por uma molécula de RNA de fita simples, circular, que não é encapsidada e não codifica proteínas, são capazes de se replicar de maneira autônoma nas células do hospedeiro. Os viroides de citros pertencem à família Pospiviroidae (cujos membros apresentam uma região central conser
Tropical Plant Pathology. Publicado em: 2009-10
-
3. Videiras duplamente infectadas pelo Citrus exocortis viroid e Hop stunt viroid no Brasil
Os viróides são os menores fitopatógenos conhecidos, sendo constituídos de uma molécula de RNA fita simples, circular, com forte estrutura secundária. Possuem genomas que variam entre 246 e 401 nucleotídeos e, por não traduzirem proteínas próprias, são totalmente dependentes da célula hospedeira para sua replicação. São classificados em duas f
Fitopatologia Brasileira. Publicado em: 2006-10
-
4. Identificação e caracterização de viróides e estudo de alguns aspectos da interação de viróides com proteínas do hospedeiro / Identification and characterization of viroids and study of some viroid-host protein interactions
The present work has been divided into four chapters to: (i) review the main points in viroid-host interactions and present different aspects in the evolutionary relationship of the viroids and virusoids; (ii) identify and characterize viroids infecting grapevine in Brazil; (iii) purify, clone and sequence what appears to be a novel citrus viroid; (iv) study
Publicado em: 2006
-
5. Arabidopsis thaliana has the enzymatic machinery for replicating representative viroid species of the family Pospiviroidae
Viroids, subviral noncoding RNAs, replicate, move, and incite diseases in plants. Viroids replicate through a rolling-circle mechanism in which oligomeric RNAs of one or both polarities are cleaved and ligated into the circular monomers. Attempts to transmit viroids to Arabidopsis have failed for unknown reasons. To tackle this question, Arabidopsis was tran
National Academy of Sciences.
-
6. Eggplant Latent Viroid, the Candidate Type Species for a New Genus within the Family Avsunviroidae (Hammerhead Viroids)
Viroids, small circular RNAs that replicate independently and in most cases incite diseases in plants, are classified into the families Pospiviroidae, composed of species with a central conserved region (CCR) and without hammerhead ribozymes, and Avsunviroidae, composed of three members lacking CCR but able to self-cleave in both polarity strands through ham
American Society for Microbiology.
-
7. Transcription of potato spindle tuber viroid by RNA polymerase II starts predominantly at two specific sites
Pospiviroidae, with their main representative potato spindle tuber viroid (PSTVd), are replicated via a rolling circle mechanism by the host-encoded DNA-dependent RNA polymerase II (pol II). In the first step, the (+)-strand circular viroid is transcribed into a (–)-strand oligomer intermediate. As yet it is not known whether transcription is initiated by
Oxford University Press.
-
8. Characterization of the RNA motif responsible for the specific interaction of potato spindle tuber viroid RNA (PSTVd) and the tomato protein Virp1
Viroids are small non-coding parasitic RNAs that are able to infect their host plants systemically. This circular naked RNA makes use of host proteins to accomplish its proliferation. Here we analyze the specific binding of the tomato protein Virp1 to the terminal right domain of potato spindle tuber viroid RNA (PSTVd). We find that two asymmetric internal l
Oxford University Press.
-
9. Inhibition of Cell Growth and Shoot Development by a Specific Nucleotide Sequence in a Noncoding Viroid RNA
Viroids are small noncoding and infectious RNAs that replicate autonomously and move systemically throughout an infected plant. The RNAs of the family Pospiviroidae contain a central conserved region (CCR) that has long been thought to be involved in replication. Here, we report that the CCR of Potato spindle tuber viroid (PSTVd) also plays a role in pathoge
American Society of Plant Biologists.