Title: Putrescine increases effective pollination period in roses.
Authors: Gudin, S.; Arene, L.
Authors’ affiliation: Selection Meilland, 06600 Antibes, France.
Published in: HortTechnology, Volumn 2, pages 211-213,(1992).
Abstract: “Flowers of Rosa hybrida cv. 255-75-A43, with a high pH stigmatic exudate (pH 9.0), and cv. 364-73-A, with a low pH stigmatic exudate (pH 5.0), were treated or not with 10-3 or 10-5M putrescine and pollinated 2 to 8 days after anther emasculation. Putrescine at 10-3M extended the effective pollination period in both cultivars. The effect of putrescine was greater in the cultivar characterized by the high pH stigmatic exudate. Putrescine at 10-5M increased fruit set in this cultivar (255-75-A43). Putrescine applied to an agar medium increased pollen tube length (10-3 and 10-5M) and the number of germinated pollen grains (10-5M) in R. hybrida cv. 86-73-UO.”