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Plant Pathology Lab
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A plant pathology lab that studies the microorganisms that cause diseases in plants.
AboutAbout the lab
Solving plant disease from the pathogen's side.
The Plant Pathology Lab studies the microorganisms that cause diseases in plants and crops.
Its main subject is Ralstonia solanacearum, the bacterial wilt pathogen. This bacterium and its relatives (the R. solanacearum species complex) are globally important bacterial pathogens that infect more than 200 plant species.
The lab investigates how diseases occur and the characteristics and functions of the pathogens, and uses this research to help develop control methods based on environmental conservation.
Key terms
- Bacterial wilt pathogen (Ralstonia solanacearum)
- A bacterium that enters through plant roots, multiplies inside the xylem vessels and blocks the water pathway, causing the plant to wilt and die.
- Race
- A classification of R. solanacearum based on the host from which it was isolated and the range of hosts it infects. It is divided into five races.
- Biological control
- A method that uses antagonism among microorganisms in nature to suppress the activity of pathogenic microorganisms and thereby prevent disease.
NewsLab news
View More ↗ResearchResearch themes
The lab mainly studies R. solanacearum, investigating the ecology of disease occurrence in plants and crops as well as the characteristics and functions of the pathogen. Drawing on broad perspectives and techniques from microbiology, physiology and biochemistry, molecular biology, and ecology, it carries out basic and applied research that contributes to developing ecosystem-harmonized control methods based on environmental conservation.
*Illustrative imageHow it infects plants in the ginger family
Race 4 of R. solanacearum infects plants in the ginger family, but race 1 cannot. The lab aims to elucidate the molecular mechanism of infection by analyzing genes found only in race 4, and to gain insight into co-evolution with plants.
*Illustrative imageCharacterizing the bacterial wilt pathogen of chrysanthemum
In recent years, wilting and dying chrysanthemums have been reported across Kyushu, and R. solanacearum was identified as the cause. This strain belongs to race 1, but its pathogenicity differs from other race 1 strains, so the lab aims to clarify its characteristics in detail through pathological, serological, and genomic analyses.
*Illustrative imageWhy mango ginger resists disease
Mango ginger is reported to be tolerant of bacterial wilt, but the mechanism is unknown. The lab aims to clarify the mechanism of disease tolerance by comparing how race 4 infection progresses in mango ginger and in ginger.
*Illustrative imageDeveloping biological control of bacterial wilt
Soil disinfection and the use of resistant cultivars are practiced, but stable control has not been achieved. The lab aims to develop a method that uses non-pathogenic R. solanacearum, which does not cause disease, as a biological control agent.
MembersFaculty
- Associate ProfessorKazuhiro Iiyama
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Leaves with Rust Infection” Mokkie / CC BY-SA 4.0 (cropped)
- How it infects plants in the ginger family: “Necrotic, discolored rhizome of edible ginger with bacterial wilt ( )” Scot Nelson / CC0 (cropped)
- Characterizing the bacterial wilt pathogen of chrysanthemum: “Chrysanthemum cultivar, Halls of Heddon - geograph.org.uk - 6973325” Andrew Curtis / CC BY-SA 2.0 (cropped)
- Why mango ginger resists disease: “Curcuma amada 1” vicharam / Public domain (cropped)
- Developing biological control of bacterial wilt: “Biological pest control ( )” Ton Rulkens from Mozambique / CC BY-SA 2.0 (cropped)
- Related lab (Zoology Lab): “IVF laboratory” Galina Fomina / CC BY 4.0 (cropped)
- Related lab (Soil Science Lab): “Gombe state University Geography students visits an Escavated hill showing soil profile with its horizons at Waka biu, Borno state 05” Csasavage / CC0 (cropped)
- Related lab (Genome Chemistry and Engineering Lab): “Bryophyte Leaf Cells” KarlGaff / CC BY-SA 4.0 (cropped)
- Related lab (Animal Products Chemistry Lab): “Muscle Tissue Skeletal Muscle Fibers ( )” Berkshire Community College Bioscience Image Library / CC0 (cropped)
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