How grass keeps growing: an integrated analysis of hormonal crosstalk in the maize leaf growth zone.

ABSTRACT: We studied the maize leaf to understand how long-distance signals, auxin and cytokinin, control leaf growth dynamics. We constructed a mathematical model describing the transport of these hormones along the leaf growth zone and their interaction with the local gibberellin (GA) metabolism in the control of cell division. Assuming gradually declining auxin and cytokinin supply at the leaf base, the model generated spatiotemporal hormone distribution and growth patterns that matched experimental data. At the cellular level, the model predicted a basal leaf growth as a result of cell division driven by auxin and cytokinin. Superimposed on this, GA synthesis regulated growth through the control of the size of the region of active cell division. The predicted hormone and cell length distribution

SUBMITTER: De Vos D 

PROVIDER: S-EPMC7116270 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature