Mechanisms of secondary growth and regulation of stem cells in stems

Wood development and the accumulation of plant biomass are mostly caused by secondary (radial) growth, which is propelled by the vascular cambium. In this article, the cellular and molecular mechanisms governing cambial stem cell activity and lineage specialization into secondary xylem (wood) and phloem are compiled. Specifically, we focus on the hormone and peptide signaling networks, transcriptional regulators, and intercellular communication signals that govern stem cell identity, proliferation, and differentiation. In order to produce adaptable wood features, we also look into how environmental inputs alter these basic programmings.We highlight the unique experimental advantages of the cambial system and discuss how bridge a longstanding knowledge gap requires this basic insight. We conclude by outlining how modern biotechnology, underpinned by a more profound understanding of mechanisms, can leverage this knowledge to design trees with ideal growth and wood characteristics, offering a methodical approach to enhancing the sustainability and productivity of forest ecosystems amidst global transformation.