(74.8–23.7%) when pollen grains were stored at the same temperature
for one additional month (Table 1). For Hedychium cv. ‘Tai
Golden Goddess’, 91.7% of freshly collected pollen grains germinated
compared to 6.8 and 1.6% for pollen stored at 4 ◦C for one
and two months, respectively (Table 1). However, this decline in
viability was less pronounced when pollen grains of the same genotype
were stored at −20 ◦C. At this temperature, 37.2 and 24.6% of
pollen grains germinated after one and two months, respectively.
For Hedychium cv. ‘Pink V’, the highest germination rate, 83.2%,
occurred for freshly collected pollen, but viability dropped 77.8
(83.2–5.4%) and 80.3 (83.2–2.9%) percentage points when pollen
grains were stored at −20 ◦C for one and two months, respectively
(Table 1). When stored at 4 ◦C, only 1.3% of the pollen grains germinated
after one month, and this viability dropped to 0% after an
additional month of storage at this temperature. Over 20% of the
pollens from ‘Orange Brush’, ‘Tai Golden Goddess’, and H. forrestii
remained viable after two months when stored at −20 ◦C, but less
than 5% of the pollens from ‘Filigree’ and ‘Pink V’ germinated when
stored under the same conditions (Table 1).