Flowering characteristics and pollination biology of rare and endangered Kolkwitzia amabilis
The floral dynamics,pollen viability,stigma receptivity,floral visitors and their behaviors,pollen ovule rate (P/O),outcrossing index (OCI)of ex-situ conservation rare and endangered plant of Kolkwitzia amabilis were studied.The main results were as follows:the anthesis of K.amabilis was about 7 days,the population flowering was about 14 d.Pollen viability achieved the maximum at 2~3 h after flowering,about 90%.After 3 days,no pollen via-bility was detected.Stigma shown acceptance during the entire anthesis and achieved the maximum at the second day after flowering.The pollen ovule rate (P/O)was 398.1±63.7 and the outcrossing index (OCI)was 3,the results in-dicated that the breeding system was outcrossing with partial self-compatibility and sometimes pollinators were nee-ded.More than 10 species of insects were observed to visit the inflorescences of K.amabilis.The most common floral visitors were bees and halictids of Hymenoptera,also a small amount of hoverflies of Diptera and a few of bumblebees and lepidopteron,among which Apidae insects were the effective pollinators.No seed was detected in K.amabilis in the ex-situ environment,further study of which is still needed.
Kolkwitzia amabilisflowering characteristicspollinatorpollinationbreeding system
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万方数据
维普
