Floral syndrome and reproductive characteristics of Adonis amurensis

Adonis amurensis is one kind of spring ephemeral perennial plant in northeast China and it is also one kind of excellent ornamental garden germplasm resource. A field investigation, including continuous observation, pollen/ovule rate (P/O) and fruit set rate, was conducted to study flower structure, flowering dynamic change and reproductive system of A. amurensis. The results showed that the population flower bloomed one time a year from March to April. The flower was large and the life span of individual flower were 6~10 days. Floral syndrome could attract pollinators. During the flowering phase, the pistil matured before stamens. At the same time, there were no space interval between stigma and anthers. The outcrossing index was 3 and the value of P/O was about 2 280. Combined these results with the results of bagging experiment, the reproductive system of A. amurensis could be determined as facultative outcrossing, self-compatible and pollinators depended.