Abstract:The contents of IAA, GA3, ZT, and vitamins B2, C, E and carotenoid in pollens of rice, maize and Chinese pennisetum stored at 4 ± 1 ℃ decreased with duration, on the contrary, ABA content increased. IAA and GA3 contents and the respiratory rate in longlived pollens of Chinese pennisetum were lowered as compared to those in short-lived pollens of rice and maize, but ABA level in Chinese pennisetum pollens was consistently raised.