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 KF Bangerth |
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| Institution: | 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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