Effects of different gibberellins on elongation growth under short day conditions in seedlings of Salix pentandra |
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Authors: | Olavi Junttila |
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Institution: | Institute of Biology and Geology, University of Tromsø, Box 790, N-9001 Tromsø, Norway. |
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Abstract: | Fifteen different gibberellins (GA's) were tested for their ability to induce elongation growth under short day conditions in seedlings of Salix pentandra L. GA's were applied either to the apex or they were injected into a mature leaf. GA3 was highly active and also GA4+7 and GA4 showed high activity. GA1, GA2, GA5, GA9, GA13, GA20, GA36 and GA47 showed moderate activity. GA16, GA17, GA27 and GA41 exhibited low or no activity in doses up to 10 μg per plant. In general, a better growth response was obtained with an application to the apex than with an injection into the leaf. |
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Keywords: | Photoperiod bioassay |
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