Cytokinins are central regulators of cambial activity.

Cytokinin and Auxin Display Distinct but Interconnected Distribution and Signaling Profiles to Stimulate Cambial Activity

Despite the crucial roles of phytohormones in plant development, comparison of the exact distribution profiles of different hormones within plant meristems has thus far remained scarce. Vascular cambium, a wide lateral meristem with an extensive developmental zonation, provides an optimal system for hormonal and genetic profiling. By taking advantage of this spatial resolution, we show here tha...

Cytokinin signaling regulates cambial development in poplar.

Although a substantial proportion of plant biomass originates from the activity of vascular cambium, the molecular basis of radial plant growth is still largely unknown. To address whether cytokinins are required for cambial activity, we studied cytokinin signaling across the cambial zones of 2 tree species, poplar (Populus trichocarpa) and birch (Betula pendula). We observed an expression peak...

Cytokinin signalling in the regulation of cambial development

Regulation of xylem cell fate

The vascular system is organized throughout the plant body for transporting water, nutrients, and signaling molecules. During vascular development, xylem, phloem, and procambial/cambial cells are produced in a spatiotemporally organized manner. Several key regulators for xylem cell patterning and differentiation have been discovered, including auxin, cytokinin, CLE peptides, microRNAs, HD-ZIPII...

Chemical Control of Vascular Cambium Initiation in Isolated Radish Roots.

Roots of many higher plants increase in diameter through the enlargement of cells formed in a vascular cambium. After the seedling plant is established, thickening begins near the root base by the initiation of cell divisions in the procambial tissue of the central cylinder. How the vascular cambium is initiated, what maintains cambial activity and causes it to extend, with time, along the root...