The fall and rise of apical dominance.
The plant hormone auxin, synthesised in the shoot apex, moves down the stem and inhibits lateral branching. Auxin does not travel upward into the branches, so it must act indirectly; for example, through a second messenger. However, recent work on auxin transport suggests a possible additional mechanism whereby auxin transport in the stem prevents the establishment of auxin transport out of the branches, inhibiting their growth.
Leyser
Ottoline
O
Department of Biology, Area 11, University of York, Heslington, York YO10 5YW, UK. hmol1@york.ac.uk
D017360:Arabidopsis / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D001692:Biological Transport / Q000235:genetics; D018506:Gene Expression Regulation, Plant; D007210:Indoleacetic Acids / Q000378:metabolism; D018519:Meristem / Q000235:genetics / Q000254:growth & development* / Q000378:metabolism; D008954:Models, Biological; D018520:Plant Shoots / Q000235:genetics / Q000254:growth & development* / Q000378:metabolism; D015398:Signal Transduction / Q000235:genetics
D007210:Indoleacetic Acids