|| 要旨トップ | 本企画の概要 |||日本生態学会第63回全国大会 (2016年3月、仙台) 講演要旨
企画集会 T17-1 (Lecture in Symposium/Workshop)
The fluctuating and synchronized flowering, called mass flowering, is a widespread phenomenon both in temperate and tropical regions. Conservation of floral initiation pathways in angiosperms opens the window for modeling flowering dynamics based on gene expression patterns to predict the occurrence of flowering events both in seasonal and aseasonal environments. Here we compared the flowering phenology between temperate (Fagus crenata) and tropical rain forests (Shorea curtisii and Shorea leprosula) based on expression analysis of highly conserved flowering-time genes and developed a model that unifies these data. A model that describes the dynamics of key flowering-time genes and their response to temperature and drought unraveled a species-specific response to environmental signals. In addition, nitrogen availability played a key role in floral induction in F. crenata. In contrast, the relationship between phosphorus content and flowering-time gene expression was clearer than nitrogen in Shorea species. Our study demonstrates the importance to couple nutrient cycling and flowering phenology to explore the mechanisms of mass flowering both in the temperate and tropical zones.