EFFECTS OF TEMPERATURE AND HUMIDITY ON POLLEN VIABILITY OF SIX ROSE SPECIES

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Abstract
Pollen of six species of genus Rosa was stored under partial vacuum at 0 and 25 C and 10, 30, 50, 70 and 90% relative humidity. Data obtained showed significant interaction between temperature and humidity. The best conditions for pollen storage at 0 C were 50 and 70% relative humidity, while at 25 C, the best humidity was 30 and 50%, respectively. Most species reached the highest percentage of viable pollen in 2–3 wk of storage. It was concluded that for short periods of pollen storage, 25 C was more suitable than 0 C for rose pollen. Differences among responses of Rosa pollen grains to storage environment are discussed.

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