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Specificity Re-evaluation of Oligonucleotide Probes for the Detection of Marine Picoplankton by Tyramide Signal Amplification-Fluorescent In Situ Hybridization ArchiMer
Riou, Virginie; Périot, Marine; Biegala, Isabelle.
Oligonucleotide probes are increasingly being used to characterize natural microbial assemblages by Tyramide Signal Amplification-Fluorescent in situ Hybridization (TSA-FISH, or CAtalysed Reporter Deposition CARD-FISH). In view of the fast-growing rRNA databases, we re-evaluated the in silico specificity of eleven bacterial and eukaryotic probes and competitor frequently used for the quantification of marine picoplankton. We performed tests on cell cultures to decrease the risk for non-specific hybridization, before they are used on environmental samples. The probes were confronted to recent databases and hybridization conditions were tested against target strains matching perfectly with the probes, and against the closest non-target strains presenting one...
Tipo: Text Palavras-chave: TSA-FISH; Probes; Specificity; Marine; Prokaryotes; Eukaryotes; Oligonucleotide; CARD-FISH.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00640/75208/75339.pdf
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Development of a scar marker for Pierce's Disease strains of Xylella fastidiosa Trop. Plant Pathol.
Travensolo,Regiane F.; Ciapina,Luciane P.; Lemos,Eliana G. M..
The objective of this research was to develop a primer for a polymerase chain reaction specific for Xylella fastidiosa strains that cause Pierce's Disease (PD) in grapes (Vitis vinifera). The DNA amplification of 23 different strains of X. fastidiosa, using a set of primers REP1-R (5'-IIIICGICGIATCCIGGC-3') and REP 2 (5'-ICGICTTATCIGGCCTAC-3') using the following program: 94 ºC/2 min; 35 X (94 ºC/1 min, 45 ºC/1 min and 72 ºC/1 min and 30 s) 72 ºC/5 min, produced a fragment of 630 bp that differentiated the strains that cause disease in grapes from the other strains. However, REP banding patterns could not be considered reliable for detection because the REP1-R and REP 2 primers correspond to repetitive sequences, which are found throughout the bacterial...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oligonucleotide; Polymerase chain reaction; PCR; REP-PCR.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000200002
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