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Auxin flow-mediated competition between axillary buds fine-tuned by other players |
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Balla J [a, b], Kalousek P [b], Procházka S [a] |
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[a] CEITEC – Central European Institute of Technology, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
[b] Department of Plant Biology, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
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The wide range of plant body forms are on one hand results of genetic determination, whilst on the other answers to different environmental conditions. This plasticity of the plant shape is possible, among others, due to activity of the shoot apical meristem (SAM). From this single meristem on the upper end of the plant axis originates the entire above-ground part of the plant mass. SAM produces continually new cells, new leaf primordia and axillary meristems. The prerequisite for formation of a branch is initiation of the axillary meristem. The regulatory mechanism, by which the SAM controls outgrowth of higher order axillary meristems, is known as apical dominance. On a two-nodal-bud pea (Pisum sativum L.) model system we show that auxin flow mediates the competition between axillary meristems for dominance after decapitation. Influence of other hormones on this auxin flow-mediated competition was also studied. |
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This work was supported by the project "CEITEC -Central European Institute of Technology" (CZ.1.05/1.1.00/02.0068) and by the Ministry of Education, Youth and Sports of the Czech Republic under the project CEITEC 2020 (LQ1601). |
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