Abstract: As the color of anthurium spathes turn green seasonally during the cultivation in Hainan island，the changes of color and the related physiological factors of the spathes during the development in two periods（normal and green）were compared. The results showed that in green season，the color parameter a^* in the ear part of spathe was significantly lower than that in normal season；The contents of total anthocyanins，total flavonoids，soluble protein，soluble sugar，and mineral element potassium were generally lower than normal；the chlorophyll content and PPO activity in early developmental stage were higher than normal. We speculated that the changes of the anthocyanin/chlorophyll content ratio directly caused the spathe turning green. While in the physiological level，the shortage of soluble protein and sugar hindered the anthocyanin synthesis. Meanwhile，due to the degradation activity of PPO，anthocyanin content decreased. Thus，spathes had to increase the synthetic amount of chlorophyll in order to supply the photosynthesis products，the green tone of spathe presented. And the accumulation of nitrogen in spathe was benefit for the chlorophyll synthesis.

Key words: Anthurium andraeanum, spathe, color, physiological changes