Study on pollen viability and stigma receptivity of three species of Allium

TTC (2,3,5triphenyl tetrazolium chloride) method, pollen staining method and BenzidineH2O2 method were used to study the pollination characteristics of 3 wild species (Allium mongolicum, A. polyrhizum and A. tenuissimum) in terms of pollen viability, pollen fertility and stigma receptivity. The results showed that all the 3 plants had high pollen viability and pollen fertility. Pollen viabilities were 73.40%2.94%, 71.23%4.39% and 80.62%4.11% for A.mongolicum, A. polyrhizum and A. tenuissimum, respectively, and the pollen fertilities were 79.44%2.83%,84.32%1.63 and 70.93%4.86% respectively. The pollen viabilities decreased quickly and pollen longevities were about 8 hours for 3 plants. Optimal pollination time was 3 to 4 hours after flowering. The stigma receptivity of 3 plants was around 5 days. Optimal rpollination period lasted around 2 days.