ISHS Acta Horticulturae 673: IX International Symposium on Flower Bulbs
STUDIES ON THE BULB DEVELOPMENT AND ITS PHYSIOLOGICAL MECHANISMS IN LILIUM ORIENTAL HYBRIDS |
| Authors: | Y.P. Xia, H.J. Zheng, C.H. Huang |
| Keywords: | Lilium Oriental hybrids, bulb development, mountainous region, carbohydrate |
| Abstract:
Based on the growth observation of lily bulbs (Lilium Oriental hybrids, ‘Acapulco’, ‘Marco Polo’, ‘Siberia’, ‘Sobonne’ and ‘Tiber’), we found the mountainous condition was suitable for the bulb development. Total 288,020 bulbs (12-14 cm, 14-16 cm and 16-18 cm in circumference) of Oriental lily were harvested from 401,500 imported bulblets (6/9 cm), which were grown in the mountainous region (Jinyun, Zhejiang Province) having an elevation of 880 m. The average ratio for harvested flowering bulbs (>12 cm) and big bulbs (16-18 cm) was 71.7% and 15.4%, respectively. The concentrations of soluble sugar, sucrose and starch in the bulb scales, as well as leaf photosynthesis were investigated during the whole year cultivation. It was found that the fresh weight and circumference of harvested bulbs have the positive correlation between vegetative growth in lily. The bud removal improved the process of bulb development. Accumulation and transportation of carbohydrates in the bulbs also increased significantly from the bud-removal. The average concentrations of starch and total soluble sugar were 293 mg g FW-1 and 9.2 mg g FW-1 in the harvested bulbs, respectively. It was indicated that the quality of mountainous reproduction bulbs was similar to that of the commercial bulbs from Holland. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
