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Summa Phytopathologica

versão impressa ISSN 0100-5405versão On-line ISSN 1980-5454

Resumo

TEBALDI, Nilvanira Donizete; PANIZZI, Rita de Cássia  e  SADER, Rubens. Detection, transmission and effect of Xanthomonas campestris pv. campestris in the physiological quality of broccoli seeds. Summa phytopathol. [online]. 2007, vol.33, n.3, pp.290-293. ISSN 0100-5405.  https://doi.org/10.1590/S0100-54052007000300014.

The detection, transmission and the effect of Xanthomomas campestris pv. campestris (Xcc) in the physiological quality of broccoli seeds were evaluated. The seeds were obtained from inoculated field plants ('Baron', 'Flórida', 'Hana Midori Sakata', 'Precoce Piracicaba de Verão', 'Ramoso Santana' and 'Sabre' genotypes) with the bacterium. For the seed pathogen detection the semi-selective medium were used: starch for xanthomonads (SX) agar, nutrient starch cycloheximide antibiotic agar (NSCAA) and basal starch cycloheximide antibiotic agar (BSCAA); the bacteria seeds transmission percentage was evaluated using sand and test tube. The physiological seed quality was evaluated by the standard germination and vigor tests: the accelerated aging, speed of emergence, seedling growth and seedling dry weight. The semi-selective medium NSCAA was more efficient to detect Xcc from broccoli seeds; there was not significant difference among genotypes regarding the percentage of bacteria transmissed by seeds percentage; although, Xcc can be disseminated by seeds, it did not affect both seed germination and vigor.

Palavras-chave : black rot; seed pathology; Brassica oleracea var. italica.

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