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Horticultural Science Lab
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A horticultural science lab studying the breeding, physiology, and ecology of fruit trees, vegetables, and ornamental flowering plants.
AboutAbout the lab
Unraveling the diversity of horticultural plants and the universal phenomena they share
The Horticultural Science Lab studies the genetics, breeding, physiology, ecology, and cultivation of fruit trees, vegetables, and ornamental flowering plants.
It aims to elucidate the "diversity" and "universal phenomena" of horticultural plants, and to apply this knowledge to society.
Its research subjects are diverse, including Japanese camellia, cyclamen, asparagus, lotus, citrus, and grape.
The lab's activities began in 1922, when a full-time assistant professor was appointed to the horticulture department.
Key terms
- Vegetables (sosai)
- A term for vegetables. Along with fruit trees and ornamental flowering plants, one of the types of plants studied in horticultural science.
- Ornamental flowering plants (kaki)
- Herbaceous or woody plants grown for their flowers. One of the types of plants studied in horticultural science.
- Chloroplast DNA
- DNA found in the chloroplasts of plants. It is separate from the DNA in the cell nucleus.
- DNA marker
- A marker used to distinguish differences in cultivars or traits by differences in DNA sequence.
NewsLab news
View More ↗ResearchResearch themes
The Horticultural Science Lab studies species and cultivar differentiation, physiology and ecology, genetics and breeding, genetic resource conservation, and cultivation in horticultural plants such as fruit trees, vegetables, and ornamental flowering plants. It aims to elucidate the "diversity" and "universal phenomena" of horticultural plants, and to apply this knowledge to society.
*Illustrative imageChloroplast DNA variation in Japanese camellia
The lab examines differences in the chloroplast DNA of Japanese camellia (Camellia japonica) growing wild across Japan. It has found three haplotypes so far, noted that variation is especially marked in the Goto Islands of Nagasaki Prefecture and on Iki and Tsushima, and discussed the origin of the cultivar 'Tamanoura'.
*Illustrative imageBreeding asparagus resistant to stem blight
Using asparagus species native to Japan, the lab studies DNA markers for developing asparagus resistant to stem blight. Results of joint research with NARO, the Kagawa Prefectural Agricultural Experiment Station, and Tohoku University were published as a paper in 2026.
*Illustrative imageWisteria breeding, flowering, and germination
The lab studies wisteria breeding and genetic diversity from angles such as cross compatibility, ploidy, flower color, and flowering physiology. It has also published papers on flowering time (phenology) in Japan over the past 65 years and on the temperatures suitable for seed germination.
*Illustrative imageRhizome coloration in red lotus root
The lab investigates how the rhizomes of the edible lotus (lotus root) become colored, looking at the role of anthocyanins and temperature. It has a paper on the characteristics of coloration in red lotus root and its genetic control.
MembersFaculty
Members of the Horticultural Science Lab include faculty, JSPS International Research Fellows, and students in the doctoral, master's, and undergraduate programs.As of 2026
- ProfessorYukio Ozaki
- Assistant ProfessorYuki Mizunoe
VoicesStudent voices
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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: “Fruit Orchard - geograph.org.uk - 2349156” Oast House Archive / CC BY-SA 2.0 (cropped)
- Chloroplast DNA variation in Japanese camellia: “Camellia japonica NBG” PumpkinSky / CC BY-SA 3.0 (cropped)
- Breeding asparagus resistant to stem blight: “Asparagus plants - geograph.org.uk - 552470” Evelyn Simak / CC BY-SA 2.0 (cropped)
- Wisteria breeding, flowering, and germination: “Japanese wisteria, Ashikaga Flower Park 11” SLIMHANNYA / CC BY-SA 4.0 (cropped)
- Rhizome coloration in red lotus root: “Kingfish crudo, lotus chips, ponzu2” Siobhan Leachman / CC0 (cropped)
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