Abstract:The reasons of dormancy, methods of breaking dormancy, and the effect of environment factors on dormancy and germination of Rosa seeds were analysed. There were some resons caused Rosa seeds dormancy, such as the restriction of pericarp and testa, physiological dormancy in embryo and inhibitory substances in pericarp, testa and embryo. Therefore, breaking dormancy methods in some Rosa plants were also reviewed, including derestriction and removing inhibitory substances, etc. The environment factors, such as temperature, water and light had important effects on seed dormancy and germination during development and ripening stages. Otherwise, microbial action and the time of hip collection affected seed dormancy and germination of Rosa plants. The dormancy mechanism of Rosa seeds was complex, and had great differences among various Rosa species.
