Effects on Pollen Viabilities of Rhododendron huadingense with Different Storage Methods

The pollen viability of Rh.huadingense and the effects ofdifferent storage methodswere studied, the results showed that the germination rate of fresh pollens was as high as 98%, fresh pollens which were stored at room temperature (20℃) had a high activity in 3 days, then the activity of pollens declined rapidly, thegermination rate was about 85.5% when the pollens were stored at 4℃ for a week, after half a month ,the germination rate was up to 50%., It can be used as a short-term (within 15 days) preservation method for Rh. huadingense pollen. When stored at-20℃ for 40 days, the germination rate of pollens was up to 87.4%, while stored at-80℃ for 60 days,the germination ratecould remain at 95.2%, it could be used for the long-term preservation of the pollen.Our results indicate that pollen viability is not the biological reasonfor the endangered state of Rh. huadingense