Entries by John Vilasboa

Lag, then leg it! An updated two-phase model for axillary bud activation and outgrowth in Arabidopsis

The mechanisms of apical dominance and bud outgrowth have puzzled generations of plant scientists, and over a century various hypotheses have been scrutinized. Two main hubs of regulation – auxin canalization (movement of auxin from a bud into the main stem) and the branching transcription factors BRANCHED 1/2 (BRC1/2) – act in parallel and are […]

Shade avoidance responses in Chinese white poplar rely on shared and unique roles of phytochrome-interacting factors

Shade avoidance syndrome (SAS) is a set of adaptive growth responses to low red to far-red light ratios. SAS includes petiole and internode lengthening and upward bending of leaves (hyponasty). In Arabidopsis, PHYTOCHROME B (PHYB) and PHYTOCHROME INTERACTING FACTORS (PIFs) are implicated in these responses. Little is known, however, about the mechanism behind SAS in […]

Contribution of synthetic auxin conjugates to clonal propagation of woody species

From food and energy to paper and timber, many industries rely on clonal propagation of tree species. Successful propagation of cuttings depends on adventitious rooting ability, which is known to decline with tree age and to be naturally low in many species of interest. Propagators therefore employ naturally occurring auxins, e.g. indole-3-butyric acid (IBA), which […]