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Related Experiment Video

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An Effective Inoculation Method for Phytophthora capsici on Black Pepper Plants

An Effective Inoculation Method for Phytophthora capsici on Black Pepper Plants

Published on: September 16, 2022

The oomycete broad-host-range pathogen Phytophthora capsici.

Kurt H Lamour¹, Remco Stam, Julietta Jupe

¹Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN 37996, USA.

Molecular Plant Pathology

|October 22, 2011

Summary

Phytophthora capsici is a destructive vegetable pathogen with increasing disease incidence. Growing molecular resources aid in studying its broad host range, diverse genotypes, and virulence mechanisms.

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Area of Science:

Plant Pathology
Oomycete Biology
Molecular Plant-Microbe Interactions

Background:

Phytophthora capsici is a destructive oomycete pathogen affecting various vegetables like cucurbits, pepper, tomato, and beans.
Disease incidence and severity have escalated in recent decades, necessitating advanced research tools.
A reference genome and growing molecular resources are available for P. capsici studies.

Purpose of the Study:

To highlight Phytophthora capsici as a significant threat to food production due to its broad host range, genetic diversity, and rapid disease cycle.
To emphasize the need for novel control strategies against P. capsici and related oomycetes.
To establish P. capsici as a robust model organism for studying oomycete sexual reproduction, host range, and virulence.

Main Methods:

Taxonomic classification: Kingdom Chromista; Phylum Oomycota; Class Oomycetes; Order Peronosporales; Family Peronosporaceae; Genus Phytophthora; Species capsici.
Disease symptomology analysis across different hosts and environmental conditions.
Utilizing available molecular resources, including a reference genome and identification tools.

Main Results:

Epidemiology varies geographically, with clonal reproduction in South America and common sexual reproduction in the USA and South Africa.
Symptoms differ based on host and environment, ranging from root/crown lesions to damping-off, wilting, and fruit rot.
P. capsici exhibits a broad host range, produces long-lived sexual spores, and possesses extensive genotypic diversity.

Conclusions:

Phytophthora capsici is a model oomycete for understanding pathogen evolution, sexual recombination impacts, and virulence mechanisms.
Continued development of molecular tools and resources is crucial for effective disease management.
Investigating P. capsici provides insights into safeguarding food production against devastating plant pathogens.