Premium
Rapid and Sensitive Detection of Xanthomonas fragariae by Simple Alkaline DNA Extraction and the Polymerase Chain Reaction
Author(s) -
Zhang S.,
Goodwin P. H.
Publication year - 1997
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1997.tb00398.x
Subject(s) - biology , polymerase chain reaction , dna extraction , dna , microbiology and biotechnology , extraction (chemistry) , bacteria , bromide , xanthomonas , chromatography , gene , biochemistry , chemistry , genetics , organic chemistry
Methods for DNA preparation from Xanthomonas fragariae in infected or artificially contaminated strawberry plants were compared in diagnostic assays using the polymerase chain reaction (PCR). The bacterium was detected using PCR with primers specific to a region of its hrp gene. Sensitivity of detection was 1.25 ×l 10 3 CFU ml ‐1 using DNA from bacterial suspensions prepared by an alkali extraction method. This was 10‐fold more sensitive than DNA extraction by boiling, and was equal to that in which DNA was prepared by a more involved cetyltrimethylammonium bromide (CTAB) procedure. Sensitivity of detection from artificially contaminated strawberry tissues was 10‐fold less than that from cell suspensions. The results indicated that a rapid and simple method of alkali DNA sample preparation is applicable for the sensitive and reliable detection of X. fragariae and possibly other plant pathogenic bacteria.