Ligation-mediated PCR, a fast and reliable technique for insertion sequence-based typing of Xanthomonas citri pv. citri.
Asiatic citrus canker, caused by Xanthomonas citri pv. citri, is a major disease threatening citrus crops throughout the world. The most common methods for strain differentiation of this pathogen are repetitive element sequence-based PCR (rep-PCR) and pulsed field gel electrophoresis (PFGE), using rare-cutting restriction enzyme analysis. We developed a ligation-mediated PCR targeting three insertion sequences (IS-LM-PCR) present as several copies in the genome of the fully sequenced strain 306 of X. citri pv. citri. This technique amplifies DNA fragments between an insertion sequence element and an MspI restriction site. The analysis of strains can be conducted within 24 h, starting from very small amounts of bacterial DNA, which makes IS-LM-PCR much less labor-intensive than PFGE. We used IS-LM-PCR to analyze a collection of 66 strains of X. citri pv. citri from around the world. The overall reproducibility of IS-LM-PCR reached 98% in this data set and its discriminatory power was markedly superior than rep-PCR. We suggest that IS-LM-PCR could be used for the global surveillance of non-epidemiologically related strains of X. citri pv. citri.
Ngoc
Lan Bui Thi
LB
Vernière
Christian
C
Belasque
José Júnior
JJ
Vital
Karine
K
Boutry
Sébastien
S
Gagnevin
Lionel
L
Pruvost
Olivier
O
D015373:Bacterial Typing Techniques / Q000379:methods*; D002957:Citrus / Q000382:microbiology*; D004251:DNA Transposable Elements; D022521:Ligase Chain Reaction / Q000379:methods*; D010802:Phylogeny; D010935:Plant Diseases / Q000382:microbiology*; D014974:Xanthomonas / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification
D004251:DNA Transposable Elements