Study on the Characteristics of Florescence and Pollen in Lagerstroemia speciosa
[Objective] To study the characteristics of florescence and pollen in Lagerstroemia speciosa. [Method] The process of flower opening and pollen tube germination of Lagerstroemia speciosa was observed and the pollen viability was determined through in vitro germination. [Result] Sepals of L. speciosa started to diverge at 4:30 am, at 7:00 am petals flatten up, anther diverged, and the stigma secreted a large number of mucus, it was the best time for artificial pollination. Boric acid and sucrose had a great effect on in vitro pollen germination of L. speciosa, the combination which made highest rate of pollen germination, was sucrose 150 g/L + boric acid 20 mg/L + CaCl2 10 mg/L. Through the fluorescence microscope,it was known that 4 hours after flowering,a lot of pollen grains germinated on the stigma,6 hours after flowering, lots of pollen tubes entered the style and reached to 1/4 length of the style,12 hours after flowering,pollen tubes concentrated into a beam forward,and reached to 1/2 length of the style,24 hours after flowering,lots of pollen tubes entered the ovary in a beam and then fertilized and produced seeds. [ Conclusion ] The results provide some basis for utilizing L. speciosa to breed.
国家科技期刊平台
NSTL
万方数据
维普
