Pollen grains can be stored for several years in liquid nitrogen having a temperature of:
–120 °C
–80 °C
–196 °C
–160 °C
it is possible to store pollen grains of a large number of species for several years using liquid nitrogen at a temperature of -196°C. This method of cryopreservation allows for the establishment of pollen banks, which are used similarly to seed banks in crop breeding programmes .
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