Abstract

The influence of relative humidity and temperature on germination of Italian alder (Alnuscordata Loisel.) pollen was studied for storage periods of up to 180 and 360 days, respectively. Three different levels of relative humidity were tested (75, 35, and 0%) while constantly maintaining the temperature at 2 °C. The storage temperatures studied were −80, −20 and 2 °C at a constant relative humidity of 0% to avoid ice formation. The results showed that the storage conditions that best preserve pollen viability were temperatures below 0 °C and relative humidity at 0%.

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