A host shift as the origin of tomato bacterial canker caused by .

The Actinomycetota (formerly Actinobacteria) genus includes phytopathogens with devasting effects in several crops. , the causal agent of tomato bacterial canker, is the most notorious species of the genus. Yet, its origin and natural reservoirs remain elusive, and its populations show pathogenicity profiles with unpredictable plant disease outcomes.

First Report of Causing Bulb Rot of Onion in Chile.

During the 2021-22 and 2022-23 seasons (December to February), onion plants (Allium cepa L.) showing decay, leaf blight, chlorosis and water soak lesions were collected in Central Chile. Five symptomatic plants were sampled from 20 different onion fields.

A New Multiplex TaqMan qPCR for Precise Detection and Quantification of in Seeds and Plant Tissue.

Bacterial canker of tomato caused by () is one of the most devastating bacterial diseases affecting the tomato industry worldwide. As the result of colonization of the xylem, the susceptible host shows typical symptoms of wilt, marginal leaf necrosis, stem cankers, and ultimately plant death. However, what makes an even more dangerous pathogen is its ability to infect seeds and plants without causing symptoms.

First Report of causing onion leaf blight and bulb decay in Central Chile.

Nearly 5,400 hectares of long-day onions () are cultivated in the Central Zone of Chile (UTM 33°3´S to 37°24´S). During summer 2021-22 and 2022-23 (December to February), followed by high temperatures (around 35°C) and high humidity conditions, symptoms showing yellowing, soft rot, blight on old leaves, necrotic tips, and soft bulbs were observed. The affected plants were observed in "spots" into the fields, and the incidence reached 5-10%.

Occurrence of Pseudomonas cichorii causing midrib rot of lettuce under hydroponic cultivation in Chile.

In Chile, lettuce is the vegetable that has increased in cultivated area the most in recent years, reaching 8,309 ha. The Coquimbo Region contributes the most to this growth in production with 3,284 ha in 2022 (ODEPA 2023). Most lettuce is grown under open field conditions, but there is significant production in greenhouses and an increase in hydroponic production systems (INIA 2017).

Rootstock increases the physiological defence of tomato plants against Pseudomonas syringae pv. tomato infection.

Climate change has intensified the infection of tomato plants by pathogens such as Pseudomonas syringae pv. tomato (Pst). Rootstocks may increase plant tolerance to leaf phytopathogens.

First Report of bacterial speck caused by pv. Race 1 affecting tomato in different Regions of Chile.

In Chile, tomato is one of the most widely cultivated vegetables, with around 5,000 ha for fresh market and 8,000 ha for processing industry. During recent years, symptoms of bacterial speck caused by pv. , have been observed more frequently in tomato plants in different regions of Chile.

Antifungal Nanoformulation for Biocontrol of Tomato Root and Crown Rot Caused by f. sp. -.

Tomatoes ( L.) are the most cultivated and important vegetable crop in the world. These plants can wilt during crop growth due to fusarium wilt (fusariosis), a disease that damages tomato vascular systems.

Analyses of Virulence Genes of subsp. Strains Reveal Heterogeneity and Deletions That Correlate with Pathogenicity.

subsp. () is the causal agent of bacterial canker of tomato. Differences in virulence between strains have been reported.

Microbial Diversity of Psychrotolerant Bacteria Isolated from Wild Flora of Andes Mountains and Patagonia of Chile towards the Selection of Plant Growth-Promoting Bacterial Consortia to Alleviate Cold Stress in Plants.

Cold stress decreases the growth and productivity of agricultural crops. Psychrotolerant plant growth-promoting bacteria (PGPB) may protect and promote plant growth at low temperatures. The aims of this study were to isolate and characterize psychrotolerant PGPB from wild flora of Andes Mountains and Patagonia of Chile and to formulate PGPB consortia.

Comparative Genomics of Pathogenic subsp. Strains from Chile Reveals Potential Virulence Features for Tomato Plants.

The genus has been associated largely with plant diseases. The aims of this study were to characterize the genomes and the virulence factors of Chilean subsp. strains VL527, MSF322 and OP3, and to define their phylogenomic positions within the species, .

The arbuscular mycorrhizal fungus Funneliformis mosseae induces changes and increases the concentration of volatile organic compounds in Vitis vinifera cv. Sangiovese leaf tissue.

Arbuscular mycorrhizal fungi (AMF) are beneficial obligate symbionts of plant roots. Volatile organic compounds (VOCs) participate in plant communication and defence. The aim of this study was to analyse the effects of the arbuscular mycorrhizal fungus Funneliformis mosseae IMA1 on VOCs in Vitis vinifera cv.

Multiple Introductions of Tomato Pathogen Clavibacter michiganensis subsp. into Iran as Revealed by a Global-Scale Phylogeographic Analysis.

Tomato bacterial canker caused by subsp. is one of the most important seed-borne tomato diseases around the globe. The disease was initially reported in 1993 in Iran, and it became a rising threat for the multibillion dollar tomato industry of the country during the last decade.

Activity of resinous exudate against phytopathogenic bacteria.

Resinous exudate obtained from the aerial parts of Hook.f. were evaluated to determine anti-phytopathogenic effects.

Biopesticide Activity from Drimanic Compounds to Control Tomato Pathogens.

Tomato crops can be affected by several infectious diseases produced by bacteria, fungi, and oomycetes. Four phytopathogens are of special concern because of the major economic losses they generate worldwide in tomato production; subsp. and pv.