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​APS News Capsule​

Hi! Here's your News Capsule
for March 19, 2020
APS webinar Technology Transfer: From The Lab To The Diagnostician’s Bench
“Technology Transfer: From the Lab to the Diagnostician’s Bench" is part of the upcoming Plant Health 2020 special session. This webinar series and the session provide an essential foundation from which to move toward robust standards, both locally and globally. Join us as we explore the various issues involved with detecting pathogens and pests and delivering diagnostic results to prevent, monitor, and manage plant problems.
March Issue of Phytopathology Includes Two Papers on Clavibacter michiganensis
Clavibacter michiganensis is the gram-positive causal agent of bacterial canker of tomato, an economically devastating disease with a worldwide distribution. This agent is explored in “Characterizing Colonization Patterns of Clavibacter michiganensis During Infection of Tolerant Wild Solanum Species” and “Comparative Genomics to Develop a Specific Multiplex PCR Assay for Detection of Clavibacter michiganensis.”
Genotyping-by-Sequencing for the Study of Genetic Diversity in Puccinia triticina
Leaf rust, caused by Puccinia triticina, is globally the most widespread rust disease of wheat. Populations of P. triticina are highly diverse for virulence, and many different races are found annually. This study by Aoun et al. is the first to report durum wheat-virulent races to Lr3bg in Tunisia, Lr14a in Morocco, and Lr3bg and Lr28 in Mexico.
Comparative Genomics Screen Identifies Microbe-Associated Molecular Patterns from ‘Candidatus Liberibacter’ spp. That Elicit Immune Responses in Plants
Citrus huanglongbing (HLB), caused by phloem-limited ‘Candidatus Liberibacter’ bacteria, is a destructive disease threatening the worldwide citrus industry. The mechanisms of pathogenesis are poorly understood, and no efficient strategy is available to control HLB. Chen et al. used a comparative genomics screen to identify candidate microbe-associated molecular patterns (MAMPs) from ‘Ca. Liberibacter’ spp. Their findings identify MAMPs that boost immunity in citrus and could help prevent or reduce HLB infection.
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