Resumen

NAVARRO-LEON, Martha Juana et al. Identification of bacteria associated with symptoms in foliage of garlic in two localities of Guanajuato. Rev. Mex. Cienc. Agríc [online]. 2025, vol.16, n.1, e3382.  Epub 27-Mayo-2025. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v16i1.3382.

Pathogenic bacteria are responsible for major impacts on major crops, causing from moderate damage to total loss. In garlic plants grown during the autumn-winter cycle 2016-2017 in two localities, Celaya and Irapuato (state of Guanajuato, Mexico), symptoms of yellow striae were detected on the leaf margin from two months after sowing. This study aimed to isolate and identify the causal agents associated with these symptoms. From 62 foliage samples with characteristic manifestations of the disease in three garlic materials, 74 pure bacterial isolates were obtained and the 13 most representative were selected according to their colonial morphology and were molecularly identified by amplification and sequencing of the 16S ribosomal gene. The following species were identified for the locality of Celaya: Pantoea agglomerans, Bacillus amyloliquefaciens, Erwinia persicina, Bacillus megaterium and Bacillus mojavensis and for Irapuato: Bacillus aryabhattai, B. amyloliquefaciens, B. megaterium and Erwinia persicina. These bacteria turned out to be of phytosanitary importance in the vegetative development and bulb formation phases, as they were recovered from damaged tissue obtained from previously inoculated plants. To the best of our knowledge, this is the first report of the presence of these bacteria related to the symptoms described in garlic crops and to the deterioration of bulbs during postharvest storage.

Palabras llave : Allium sativum L.; bacteriosis in garlic; molecular identification; pathogenicity.

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