Identification of wild Hydrangea macrophylla germplasm with tolerance to the excessive solar radiation from Izu Islands and study on mechanism of the tolerance

Research Project

Project/Area Number	15K07297
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Horticultural science
Research Institution	The University of Shiga Prefecture
Principal Investigator	Uemachi Tatsuya 滋賀県立大学, 環境科学部, 准教授 (40243076)
Project Period (FY)	2015-04-01 – 2018-03-31
Project Status	Completed (Fiscal Year 2017)
Budget Amount *help	¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000) Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000) Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000) Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords	強光耐性 / 遺伝資源 / 伊豆諸島 / アジサイ / クロロフィル蛍光 / 都市緑化植物 / 最大量子収率 / 光阻害 / 病害耐性 / ITS配列
Outline of Final Research Achievements	Plant species for urban greening are limited because of severe growth condition. There are abundant unutilized genetic resources of Hydrangea macrophylla in Japan. In this study, we explored novel hydrangea germplasm with tolerance to the excessive solar radiation from Izu Islands in order to develop suitable hydrangea cultivars to urban greening. Some wild plants introduced from Izu Islands including Hachijojima Island and Niijima Island showed remarkable tolerance to the excessive solar radiation in screening tests. We found wild Hydrangea macrophylla plants growing under severe environmental stress including excessive solar radiation, oligotrophic soil and desiccation in seven areas in Miyakejima Island.