COORDINATION OF MULTILAYERED SIGNALLING PATHWAYS ON VASCULAR CAMBIUM ACTIVITY

Secondary growth depends on the activity of cambial stem cells, which proliferate, and then descendant cells differentiate into the transport tissues, secondary phloem, and secondary xylem. The proliferation of cambial stem cells is regulated by various signals, including long-distance hormonal signalling from apical meristems, and short-range peptide signals fromsurrounding tissues. These long- and short-distance signalling pathways interact and coordinately modulate cambium activity. Furthermore, a large number of transcription factors, often in gene families, regulate cambium cell division. In this article, we discuss the coordination of the aforementioned multilayered signalling pathways and highlight the new discoveries on the control of cambial activity.