The role of endogenous cytokinins in correlation between cotyledon and its axillary bud and in hypocotyl regeneration of flax |
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Authors: | J ?ebánek Hoang Minh Tan Jarmila Blazková |
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Affiliation: | (1) Department of Botany and Plant Physiology, Agricultural University, Zemědělská 1, 662 66 Brno, Czechoslovakia |
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Abstract: | When flax seedlings are decapitated above cotyledons and three days later one of the two cotyledons is removed then the remaining
cotyledon stimulates in four to five days growth of its axillary bud. It has been found that content of endogenous cytokinins
was higher in the stimulated bud as compared with the other one already 12 h after the cotyledon removal.
Flax seedlings decapitated under cotyledons regenerate adventitious buds on thy hypocotyl stump during 5–6 days. The endogenous
fytohormonal preparation of this regeneration was investigated in the 20 mm apical part of the hypocotyl stump. Decrease in
auxin and increase in gibberellins was already found during the first day after decapitation while the level of cytokinins
increased as late as three days after the apex removal. |
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