Abstract
Phaseolus vulgaris is the most legume cultivated in the world; in Mexico, it is considered the second most important crop after corn. The aim of this research was to determine the characteristics of Xanthomonas campestris strain “Xcf1-APJR” isolated from the leaves of bean crops, and determine the antimicrobial activity of cinnabarin on this strain. Bacterial cultures were obtained from leaves with necrotic leaf spot symptoms of bean plant variety “Flor de Mayo M38” in Puebla, Mexico. The antimicrobial activity of cinnabarin was tested at 7, 14 and 21 days on X. campestris pv. campestris. The Xcf1-APJR strain showed 100% identity with X. campestris pv. campestris as a causal agent of necrotic leaf spot. Treatment with a potato dextrose medium with a dehydrated sugar cane (PDA+C) showed a higher orange pigmentation than the other treatments after 7, 14 and 21 days of incubation and a higher concentration of cinnabarin (54.33 InU/g) with in vitro antimicrobial activity against X. campestris pv. campestris.
Highlights
According to the morphological characteristics corresponding to the genus Xanthomona, it was confirmed that Xcf1-APJR strain is within this bacterial genus
The growth of the isolate in YDC confirmed the presence of the yellow thomona, it was confirmed that Xcf1-APJR strain is within this bacterial genus
The morphology of the colonies coincided with that reported by Papinutti [35] for P. sanguineus, which showed aerated and velvety orange mycelium at 29 days post-inoculation
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Beans (Phaseolus vulgaris L.) are the most important legume harvested around the world [1]. The global production of beans in 2019 was 28,974,968 tons, with Myanmar being the main producer, with 5,849,622 tons, followed by India with 5,310,000 tons and Brazil with 2,906,508 tons. Mexico occupies the eighth place, with a production of 879,404 tons [2]
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