Avaliação da viabilidade do pólen em algumas variedades de crisântemo em spray no período de armazenamento

Abstract

Abstract In producing chrysanthemum hybrids, more seed sets per fruit are preferred. Only successful pollination and fertilization allow seeds to de-velop. High pollen viability and pollen germination rate are intimately correlated with successful fertilization. Chrysanthemum pollen and their storage duration have only been the subject of a relatively few investigations. The study aimed to determine pollen's viability and germination during the 4 days, which were kept at 24 ºC. In the present study, two different Chrysanthemum species (Chrysanthemum coronarium L. and Chrysanthemum segetum L.) and two commercial Chrysanthemum varieties (Chic and Haydar) that belong to Chrysanthemum morifolium Ramat. species as spray chrysanthemum pollens were used for experimental material. The grains pollen were stored in an incubator which was 24 ºC and 60% humidity. The pollen viability was tested with TTC (2,3,5 Triphenyl Tetrazolium Chloride) staining test and pollen germination was evaluated hanging drop method with modified ME3-m medium, daily for 4 days including day 0. The results showed that the viability and germination of all pollens used in this study decreased day by day. Depending on the species/varieties, the viability rates ranged from 12.83% to 32.04% on the first day and between 0.57-2.33% on the last day. Pollen germination rates differed between 16.76% - 3.45% on the 0th day and 0.0-0.17% on the 4th day.