Cambium, in plants, layer of actively dividing cells between xylem (wood) and phloem (bast) tissues that is responsible for the secondary growth of stems and roots (secondary growth occurs after the first season and results in increase in thickness). …

A cambium (pl.: cambiums or cambia), in plants, is a tissue layer that provides partially undifferentiated cells for plant growth. It is found in the area between xylem and phloem. A cambium can also be defined as a cellular plant tissue from which phloem, xylem, or cork grows by division, resulting (in woody plants) in secondary thickening.

2024年6月18日 · Recent lineage tracing studies have shown that only one of the cambial cells in each radial cell file functions as the stem cell, capable of producing both secondary xylem and phloem. Here, we first review how phytohormones and signalling peptides regulate vascular cambium formation and activity.

2023年7月11日 · In dicot plants, the vascular system is organized in a ring, with the xylem typically inside, surrounded by phloem. There is often a region of meristematic cambium cells, which divide to produce more xylem or phloem cells, …

The vascular cambium produces secondary xylem on the inside of the ring, and secondary phloem on the outside, pushing the primary xylem and phloem apart. The vascular cambium usually consists of two types of cells: Fusiform initials (tall, axially oriented) Ray initials (smaller and round to angular in shape)

2024年8月24日 · In stems, the vascular cambium is a single layer between the xylem and phloem. In roots, it forms a complete cylinder encircling the central xylem and produces xylem and phloem towards the interior and exterior of the root, respectively.

2022年5月27日 · Cambium is one such group of actively dividing (meristematic) cells that is responsible for the secondary growth of the plant. It is a thin layer of living tissue located between the xylem and phloem of stems and roots of vascular plants. They are equivalent to undifferentiated human stem cells.

2021年8月17日 · Secondary xylem (wood) and phloem are the inner and outer derivative products of the vascular cambium. Xylem is mainly comprised with dead cells with thickened cell walls rich in cellulose, hemicelluloses, and lignin and responsible for providing mechanical support and conducting water and minerals for the plant.

Plant vascular development is a complex process culminating in the generation of xylem and phloem, the plant transporting conduits. Xylem and phloem arise from specialized stem cells collectively termed (pro)cambium. Once developed, xylem transports mainly water and mineral nutrients and phloem transports photoassimilates and signaling molecules.

Secondary growth occurs within the vascular cambium of these plants, which is a thin layer of tissue containing actively dividing cells. The vascular cambium is a meristematic tissue that develops between the stem's primary phloem and primary xylem. As cells within the vascular cambium divide, they produce secondary phloem and secondary xylem.