Search results
Results from the WOW.Com Content Network
The vascular cambium is the main growth tissue in the stems and roots of many plants, specifically in dicots such as buttercups and oak trees, gymnosperms such as pine trees, as well as in certain other vascular plants. It produces secondary xylem inwards, towards the pith, and secondary phloem outwards, towards the bark.
The vascular cambium is mainly responsible for the secondary growth of the plant. In contrast to apical meristems in root and shoot tips, vascular cambium give rise to lateral meristems. They are closely intertwined with the xylem and phloem of the vascular bundle.
The vascular cambium, a secondary meristem, is the driving force of secondary growth, which increases the girth of plant organs. Once the vascular cambium is established, it keeps producing new vasculature (xylem and phloem) forming the bases of radial growth.
Vascular cambium is a cylindrical secondary meristem whose activity gives rise to the secondary growth. Like SAM and RAM, vascular cambium contains bifacial cambium stem cells in Arabidopsis (Shi et al., 2019; Smetana et al., 2019).
Vascular cambium or cambial zone refers to the anatomically recognized meristematic cells in the secondary tissue (Evert, 2006), and the number of these cells in each radial file in vascular cambia can vary from one to several dozen, depending on the species.
Structure of the vascular cambium. It is generally agreed that the vascular cambium is composed of a layer of cells only one cell thick, and that all of these cells are meristematic cambial initials from which cells of the secondary xylem and secondary phloem are derived.
The vascular cambium functions by dividing in a tangential plane, meaning it produces new cells that contribute to the thickening of the plant’s axis. The secondary xylem, formed on the inner side of the cambium, accumulates over time and becomes the wood that provides structural support.
The vascular cambium contains meristem cells that produce secondary xylem and phloem in the stems and roots of many plants. Its activity largely determines wood formation.
Although vascular cambium has a unique function among plant meristems, the stem-cell organizer of this tissue shares features with the organizers of root and shoot meristems.
The vascular cambium presents fundamental questions about the evolution and developmental biology of plants. Over time, our perspectives of the vascular cambium have changed as new...