Seed dormancy of Trillium camschatcense requiring 21 months from seed dispersal to cotyledon emergence

Research Project

Project/Area Number	20580019
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Horticulture/Landscape architecture
Research Institution	Hokkaido University
Principal Investigator	KONDO Tetsuya Hokkaido University, 農学研究院・大学院, 教授 (10153727)
Project Period (FY)	2008 – 2010
Project Status	Completed (Fiscal Year 2010)
Budget Amount *help	¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000) Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000) Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000) Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords	種子発芽 / オオバナノエンレイソウ / 温度 / 光 / 種子休眠 / 胚成長 / Trillium camtschatcense
Research Abstract	To know the reason why seeds of Trillium camschatcense need long periods for 21 months from seed dispersal to cotyledon emergence, temperature and light requirement for embryo growth, radicle emergence, and cotyledon emergence of seeds were revealed. Embryos in seeds were undeveloped at seed dispersal. The first low temperature was required for embryo growth and radicle emergence, and the second low temperature was required for cotyledon emergence from seeds producing roots. Percentages of radicle emergence at constant temperature or in dark were higher than at alternating temperature or in light.