キリンソウと四季の彩り日記屋上緑化システム株式会社
技術顧問　山下 律正

Chemical mutation technology
A new variety of greening plant Phedimus takesimens

Nice to meet you, I’m Ritsumasa Yamashita, a guests researcher at the Research Institute of Tokyo City University.
I study chemical mutations in plants and develop new plants.

In the case of the Phedimus takesimensis , which I am researching, I am trying to find the characteristics hidden in the genes, such as the growth limit of the plant, such as “it does not wither even at 50 degrees Celsius”. It grows over the years. ” Years without rain. “More than 1 month”, “Plant height changes”, “Flowers do not bloom” are possible at low cost and with high probability.

Experiments use ethyl ethane sulfonic acid (EMS), which is relatively safe.

Due to its low carcinogenicity, it has not been used in recent years, but it is an excellent mutagen that can increase the probability of occurrence by 1,000 to 5,000 times if properly treated. You can expect what kind of new species will appear.

In the experimental course, we used the heart of Phedimus takesimensis (Nakai), which is used for rooftop greening, as a theme. We are promoting the creation of new varieties that overcome the shortcomings of current varieties, have high weather resistance, do not require maintenance, and can grow independently on natural rainwater.

Bottom: Phedimus takeimensis using color-changing mutation technology
Above: Original Phedimus takeimensis

Mutations change the shape of flowers
Above: Original Phedimus takeimensis flower
Below: A green bouquet of Phedimus takeimensis made by mutation technology

The “Chemical Mutation Breeding Experimental Lecture” is intended to be useful for people involved in plants, researchers of chemical mutation, and those who aim to become entrepreneurs of new varieties, and will mainly explain the know-how of experiments.

Please study academic content on your own.

next time

“Chemical Mutation Breeding Experimental Lecture” 1 We will explain experimental methods of chemical mutation to develop greening plants that live with little watering using chemical mutation technology.

Technical Advisor: Ritsumeikan Yamashita

References
Crop Breeding Theory and Practice, edited by Kanichi Murakami, 1985, Yokendo
Plant Breeding (Volume 2), by Hiroshi Fujimaki and Yasuo Ukai, April 5, 1992, Baifukan
Chemical Mutagenesis, 1972, Radiation Breeding Station
Principles of Plant Improvement, Volume 1, by Hiroshi Fujimaki and Yasuo Ukai, May 30, 1984, Baifukan
Tamarin Genetics, Volume 2, by R.H. Tamarin, June 30, 1988, Baifukan
Horticultural Breeding and Production Science, co-authored by Hideo Imanishi, October 30, 1997, Asakura Shoten
T.A. BUROWN, Molecular Genetics Tokyo Kagaku Dojin
Plant Hormone Handbook 12/3, Nobutaka Takahashi, April 30, 1994, Baifukan
Plant Breeding, Yasuyoshi Hinata, Asakura Shoten
Artificial Mutation, Yoshimaro Tanaka, 1938, Yokendo
Mutation Induction in Carnations by EMS Treatment and Comparison with Other Mutation Induction Treatments, Masayoshi Arai