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Effect of Low Temperature and GA3 Treatment on Flowering and Cut Flower Yield of Limonium spp. in Summer and Winter Cultivations  

Chin, Young Don (Flower Research Institute, Gyeongnam Agricultural Research and Extension Services)
An, Dong Chun (Flower Research Institute, Gyeongnam Agricultural Research and Extension Services)
Hwang, Ju Chean (Flower Research Institute, Gyeongnam Agricultural Research and Extension Services)
Song, Ju Yeon (Department of Horticulture, Division of Applied Life Science (BK21 Program), Graduate School, Gyeongsang National University)
Jeong, Byoung Ryong (Department of Horticulture, Division of Applied Life Science (BK21 Program), Graduate School, Gyeongsang National University)
Publication Information
FLOWER RESEARCH JOURNAL / v.18, no.1, 2010 , pp. 44-49 More about this Journal
Abstract
This study was carried out to investigate effect of low temperature and $GA_3$ treatment on flowering and cut flower yield of Limonium spp. 'Ocean Blue' and 'Fantasia' in summer and winter cultivations. Plants were kept at $3^{\circ}C$ for 4 weeks, and were treated with a foliar spray of $400mg{\cdot}L^{-1}$ $GA_3$ at seven weeks after transplanting in both seasons. The effect of low temperature $3^{\circ}C$ for two weeks $GA_3$ application was tested only in winter. In summer cultivation, 'Ocean Blue' and 'Fantasia' of cut flower production by low temperature treatment were increased about 16% and 53%, respectively, while bolting and flowering advanced significantly in 'Ocean Blue' as compared to those in the control. In winter cultivation, growth and development increased, especially, in 'Fantasia'. With low temperature treatment to 'Fantasia' for 4 weeks, cut flower production was increased about 35%. In addition, bolting and flowering were hastened by about 20 and 10 days, respectively. Combined treatment of low temperature and $GA_3$ advanced bolting and flowering with little difference among the cultivars, while, in 'Fantasia' it shortened days to flowering and produced more and best quality flowers as compared to the other treatments and the control.
Keywords
bolting; Fantasia; flower quality; Ocean Blue;
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