Floral induction (FI) in longan (Dimocarpus longan, Lour.) trees. III: Effect of shading the trees on potassium chlorate induced FI and resulting hormonal changes in leaves and shoots |
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| Authors: | K. Sringarm P. Potchanasin D. Naphrom K.F. Bangerth |
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| Affiliation: | 1. Central Laboratory, Faculty of Agriculture, Chiangmai University, Chiang Mai 50200, Thailand;2. Institute for Special Crop Cultivation and Crop Physiology, University of Hohenheim, 70599 Stuttgart, Germany;3. Department of Horticulture, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand |
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| Abstract: | Previous experiments demonstrated that treatment of longan trees with potassium chlorate (KClO3) induces “off season floral induction” (FI) even in the absence of the naturally required cool temperature [Manochai, P., Sruamsiri, P., Wiriya-alongkorn, W., Naphrom, D., Hegele, M., Bangerth, F., 2005. Year around off season flower induction in longan (Dimocarpus longan, Lour.) trees by KClO3 applications: potentials and problems. Sci. Hortic. 104, 379–390]. Potassium chlorate, however, cannot replace the presence of functional mature leaves and sufficient light intensity. Here we examined in more detail the effect of shade (about 10% of natural sunlight) on KClO3 affected hormone concentrations/transport of leaves and shoot apical buds (SAB) and their interactions with FI. |
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| Keywords: | FI, floral induction GAs, gibberellins IAA, indole acetic acid iP/iPA, N6 (Δ2-isopentenyl) adenine/N6 (Δ2-isopentenyl) adenosine SAB, shoot apical bud(s) Z/ZR, zeatin/zeatin riboside |
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