Bacterial leaf spot of Guazuma ulmifolia (Lam.) caused by Xanthomonas axonopodis

Abstract

RESUMO v.35, n.2, p.146-147, 2009 coloração amarelada em meio YSG, e que inoculadas em plantas sadias reproduziram os sintomas observados no campo. Testes bioquímicos, fisiológicos, produção de xanthomonadina e testes moleculares de PCR-RFLP da região espaçadora 16S-23S rDNA indicaram que os organismos isolados pertencem à espécie Xanthomonas axonopodis. media were isolated from typical lesions and pathogenicity of strains were confirmed on artificialy inoculated leaf on healthy plants. The biochemical and physiological tests, xanthomonadin production and molecular tests using PCR-RFLP of the 16S-23S rDNA indicated that the isolates belong to the species Xanthomonas axonopodis.

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“…Guazuma ulmifolia is a medium spectrum tree, popularly known as guacimo or mutamba, belonging to the Malvaceae family, and can reach up to 20m high (Figure 1). It is found in deciduous and tropical forests of Central and South American countries and its growth is favorable in warm environments, around 24°C, at sea level in 1200m, in soil with good drainage and pH above 5.5 [3][4][5].…”