About the Authors

Atsushi Kasai

Affiliation Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Japan

Teruo Sano

Affiliation Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Japan

Takeo Harada

tharada@cc.hirosaki-u.ac.jp

Affiliation Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AK TH. Performed the experiments: AK TS. Analyzed the data: AK TH. Contributed reagents/materials/analysis tools: AK TS. Wrote the paper: AK TS TH.