Structural specificity in plant–filamentous pathogen interactions

Plant diseases bear names such as leaf blights, root rots, sheath blights, tuber scabs, and stem cankers, indicating that symptoms occur preferentially on specific parts of host plants. Accordingly, many plant pathogens are specialized to infect and cause disease in specific tissues and organs. Conv...

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Bibliographic Details
Published in:Molecular plant pathology 2020-11, Vol.21 (11), p.1513-1525
Main Authors: Lacaze, Aline, Joly, David L.
Format: Article
Language:English
Subjects:
Chitinase
developmental stages
filamentous pathogens
Fungi
Host plants
Infections
organ
Organs
Pathogenesis
Pathogens
plant disease
Plant diseases
Plant resistance
Plant tissues
Proteins
Review
Scab
Selective breeding
Sheaths
Signs and symptoms
structural specificity
tissue
Virulence
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Summary:Plant diseases bear names such as leaf blights, root rots, sheath blights, tuber scabs, and stem cankers, indicating that symptoms occur preferentially on specific parts of host plants. Accordingly, many plant pathogens are specialized to infect and cause disease in specific tissues and organs. Conversely, others are able to infect a range of tissues, albeit often disease symptoms fluctuate in different organs infected by the same pathogen. The structural specificity of a pathogen defines the degree to which it is reliant on a given tissue, organ, or host developmental stage. It is influenced by both the microbe and the host but the processes shaping it are not well established. Here we review the current status on structural specificity of plant–filamentous pathogen interactions and highlight important research questions. Notably, this review addresses how constitutive defence and induced immunity as well as virulence processes vary across plant organs, tissues, and even cells. A better understanding of the mechanisms underlying structural specificity will aid targeted approaches for plant health, for instance by considering the variation in the nature and the amplitude of defence responses across distinct plant organs and tissues when performing selective breeding. Do plant resistance and pathogen virulence differ between organs, tissues, or even cell types? Many aspects of structural specificity are exposed in this review, as well as unknown elements that remain to be elucidated.
ISSN:1464-6722
1364-3703
DOI:10.1111/mpp.12983