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Media type:
E-Article
Title:
Sugar demand, not auxin, is the initial regulator of apical dominance
Contributor:
Mason, Michael G.;
Ross, John J.;
Babst, Benjamin A.;
Wienclaw, Brittany N.;
Beveridge, Christine A.
Published:
Proceedings of the National Academy of Sciences, 2014
Published in:
Proceedings of the National Academy of Sciences, 111 (2014) 16, Seite 6092-6097
Language:
English
DOI:
10.1073/pnas.1322045111
ISSN:
0027-8424;
1091-6490
Origination:
Footnote:
Description:
<jats:title>Significance</jats:title>
<jats:p>It is commonly accepted that the plant hormone auxin mediates apical dominance. However, we have discovered that apical dominance strongly correlates with sugar availability and not apically supplied auxin. We have revealed that apical dominance is predominantly controlled by the shoot tip’s intense demand for sugars, which limits sugar availability to the axillary buds. These findings overturn a long-standing hypothesis on apical dominance and encourage us to reevaluate the relationship between hormones and sugars in this and other aspects of plant development.</jats:p>