Germination and Storage of Vinca Seed Is Influenced by Light, Temperature, and Relative Humidity

Light, temperature, relative humidity (RH), and GA 3 affect vinca [Catharanthus roseus (L.) G. Don] seed storage and/or germination. GA 3 failed to increase the germination percentage in darkness but significantly increased the percentage in continuous light. Similarly, GA 3 treatment reduced both the number of days required to achieve 50% of the final germination percentage (T 50 ) and the span between 10% and 90% germinatlon (T 90 -T 10 ) for seeds in light, but not in darkness (...)