Astaxanthin is irradiated with artificial light to accumulate green algae were irradiated , the green algae is a green algae growth promotion methods for promoting growth in a green migrating cells , alternating and continuous red illumination light and the blue illumination light and then , the culture liquid of the green algae while maintaining the state is green or brown , and is characterized in that growing the algae in the liquid medium .アスタキサンチンを蓄積する緑藻類に人工光を照射して、前記緑藻類が緑色の遊走細胞である状態での生育を促進させる緑藻類生育促進方法であって、赤色照明光と青色照明光を交互かつ連続に照射して、前記緑藻類の培養液が緑色ないし褐色である状態を維持しながら、前記緑藻類を液体培地で生育させることを特徴とする。
