2004
DOI: 10.1590/s0102-05362004000100016
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Abstract: A resistência varietal é uma impor tante ferramenta para o controle de doenças de plantas, notadamente as causadas por bactérias fitopatogênicas onde o controle químico é muitas vezes ineficaz (Lopes e Quezado-Soares, 1997).A eficiência e durabilidade da resistên-cia depende, entre outros fatores, da variabilidade genética do patógeno. Variações em patogenicidade expressas em termos de raças fisiológicas ocorrem em diversos patógenos, evoluindo freqüentemente nas populações em resposta à introdução de genes de… Show more

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Cited by 11 publications
(8 citation statements)
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“…Since the first report on the presence of the four Xanthomonas species of the tomato bacterial spot complex in Brazil, the distribution and prevalence of each species has changed over time. The presence of X. perforans in Brazil, together with X. gardneri , seems to be more recent than that of X. vesicatoria and X. euvesicatoria , as the former species presented very low diversity, addressed by pulsed field profiles, and they were exclusively restricted to imported tomato hybrids at that time (Quezado‐Duval & Camargo, ; Quezado‐Duval et al ., ). Moreover, X .…”
Section: Discussionmentioning
confidence: 99%
“…Since the first report on the presence of the four Xanthomonas species of the tomato bacterial spot complex in Brazil, the distribution and prevalence of each species has changed over time. The presence of X. perforans in Brazil, together with X. gardneri , seems to be more recent than that of X. vesicatoria and X. euvesicatoria , as the former species presented very low diversity, addressed by pulsed field profiles, and they were exclusively restricted to imported tomato hybrids at that time (Quezado‐Duval & Camargo, ; Quezado‐Duval et al ., ). Moreover, X .…”
Section: Discussionmentioning
confidence: 99%
“…Isolate kept in water was recovered, transferring bacterial suspension into Petri dishes with DYGS solid medium (Rodrigues Neto et al, 1986), using a platinum handle. After staying in a bacteriological incubator for 48 h at 28°C, bacterial colonies were suspended in distilled and autoclaved water, and its concentration was adjusted to 10 8 cfu/ mL with the aid of a spectrophotometer at 600 nm wavelength and absorbance of 0.300 (A 600 = 0.3) (Quezado-Duval & Camargo, 2004). Next, we performed a serial dilution up to a concentration of 10 5 cfu/mL.…”
Section: Methodsmentioning
confidence: 99%
“…For experiments, X. campestris pv. campestris was grown in Nutrient Agar (NA) at 25 °C for 72 h. The bacterial cells were scraped from the NA plates, suspended in sterilized distilled water and the concentration adjusted to 5 × 10 6 colony forming units mL −1 from optical density measurements (OD 600 nm absorbance of 0.3 adjusted for 5 × 10 8 UFC.mL −1 ) 41 . The inoculation was performed at the end of the day, eight days after plant treatment with each plant protectant, i.e.…”
Section: Methodsmentioning
confidence: 99%