Pseudomonas syringae pv. actinidiae (Psa) is an emerging phytopathogen causing bacterial canker disease in kiwifruit plants worldwide. Quorum sensing (QS) gene regulation plays important roles in many different bacterial plant pathogens. In this study we analyzed the presence and possible role of N-acyl homoserine lactone (AHL) quorum sensing in Psa. It was established that Psa does not produce...

Chlorine is a commonly used disinfectant for tomato seed contaminated with the bacterial pathogens causing canker, spot, and speck diseases. Previous research has attempted to determine chlorine effectiveness by testing for the presence of the pathogen after treatment of infected seed lots. Even with the most advanced techniques, the accuracy of these methods is questionable, and can underestim...

Soils in which disease fails to develop despite pathogen presence are considered disease-suppressive. They offer sustainable, effective protection plants against infection by soil-borne pathogens. Naturally disease-suppressive soils have been reported for diseases of a diverse range agricultural crops worldwide yet the underlying mechanisms suppression still not completely understood. Two large...

European apple canker, caused by Neonectria ditissima, causes serious damage to trees, particularly young trees. Canker management is difficult because of the limited availability effective fungicides, long latency period, inoculum abundance and host resistance in commercial cultivars as well need for costly manual pruning interventions. To understand disease aggregation more management, we ass...

Rhizoctonia stem canker and black scurf. Rhizoctonia diseases of potato are caused.Black scurf on a potato tuber caused by Rhizoctonia solani. Rhizoctonia potato disease is an important constraint to potato production. The disease.ISBN 978-952-10-5475-4 PDF http:ethesis.helsinki.fi. 2 Variation of biological traits in Rhizoctonia solani isolated from potato. Abstract Rhizoctonia solani is an im...

Clavibacter michiganensis subsp. michiganensis (Cmm) is a gram-positive actinomycete, causing bacterial wilt and canker disease in tomato (Solanum lycopersicum). Host responses to gram-positive bacteria and molecular mechanisms associated with the development of disease symptoms caused by Cmm in tomato are largely unexplored. To investigate plant responses activated during this compatible inter...

Background: Xanthomonas citri subsp. citri (Xcc), the causative agent of bacterial citrus canker, has affected citriculture worldwide. Varieties of means have been used to minimize its devastating effects, but no attention has been given to bacteriocins. Objectives: Here and for the first time, we report the isolation and characterization of two novel bacteriocins. Materials and Methods: Secret...

Canker disease of prickly ash (Zanthoxylum bungeanum) has caused a decline in the production of this economically important spice in northern China in the past 25 y. To identify the etiological agent, 38 fungal isolates were recovered from symptomatic tissues from trees in five provinces in China. These isolates were identified by conducting BLASTN queries of NCBI GenBank and phylogenetic analy...

The eastern redbud (Cercis canadensis L.) is a popular woody ornamental plant native to eastern North America that is planted in the landscape chiefly for its showy early spring bloom. The genus Cercis (family Fabaceae) contains, depending on author, 7 to 13 species or subspecies that occur in North America, Europe, and Asia (4,7,8). Species range in size from small shrubs to trees, tolerate fu...