Phylogeny and Identification of Species Associated with Bulb Rot and Bacterial Leaf Blight of Onion Crops in Uruguay.

Onion is among the most consumed vegetables in Uruguay, grown in the northwestern and southern regions of the country. The onion supply presents interannual variations associated with significant postharvest losses, mainly caused by bacterial rots. Besides bulb rotting, onion leaf lesions as well as infections on seed-stalks during seed production may be devastating for some varieties under conducive conditions.

Genetic and Phenotypic Characterization of Species Pathogenic in Wheat in Uruguay.

Bacterial diseases affecting wheat production in Uruguay are an issue of growing concern yet remain largely uninvestigated in the region. Surveys of 61 wheat fields carried out from 2017 to 2019 yielded a regional collection of 63 strains identified by 16S rRNA gene analysis as spp. A real-time PCR protocol with species-specific primers previously reported allowed the identification of 44 strains as , the causal agent of bacterial leaf streak (BLS) in wheat and other cereal crops.

An Integrative Approach for the Characterization of Plant-Pathogenic spp. Strains Based on Metabolomic, Bioactivity, and Phylogenetic Analysis.

Actinomycetes are generally recognized as a diverse group of gram-positive, mycelium-forming, soil bacteria that play an important role in mineralization processes and plant health, being the most well-known genus from this group. Although plant pathogenicity is a rare attribute in this genus, some species have significant impact worldwide due to their ability to cause important crop diseases such as potato common scab (CS). In this work, an integrative approach was applied to investigate the pathogenic potential of spp.

Thyme and suico essential oils: promising natural tools for potato common scab control.

Potato common scab is a worldwide disease mainly caused by Streptomyces scabiei. It seriously affects potato crops by decreasing tuber quality. Essential oils (EO) are natural products with recognised antimicrobial properties.

Isolation and structural characterization of a non-diketopiperazine phytotoxin from a potato pathogenic strain.

Two spp. strains responsible for potato common scab infections in Uruguay which do not produce diketopiperazines were identified through whole-genome sequencing, and the virulence factor produced by one of them was isolated and characterized. Phylogenetic analysis showed that both pathogenic strains can be identified as , and the structure of the phytotoxin was elucidated as that of the polyketide desmethylmensacarcin using MS and NMR methods.