Interfascicular cambium is an example of Secondary meristem

Secondary meristems are responsible for the increase in girth or thickness of plants. They are derived from primary meristems and contribute to the secondary growth of the plant. Interfascicular cambium is one such secondary meristem that plays a crucial role in the development of vascular tissues in woody plants.

Interfascicular cambium
Interfascicular cambium is a secondary meristem that arises between the primary xylem and primary phloem in the stems of woody plants. It develops from the cells of the primary medullary rays, which are parenchymatous tissues present between the vascular bundles. The cells of the interfascicular cambium divide and differentiate into secondary xylem cells towards the inner side and secondary phloem cells towards the outer side.

Function
The main function of the interfascicular cambium is to produce secondary xylem and secondary phloem, which contribute to the increase in girth of the plant stem. The secondary xylem, also known as wood, provides mechanical support to the plant and conducts water and minerals. The secondary phloem, on the other hand, is responsible for the transport of organic materials, such as sugars, from the leaves to other parts of the plant.

Formation
Interfascicular cambium is formed during the secondary growth of woody plants. As the primary meristems become inactive, the cells of the primary medullary rays located between the vascular bundles start dividing. These dividing cells form a continuous layer of meristematic tissue, which is the interfascicular cambium. The interfascicular cambium then undergoes cell division and differentiation to produce secondary xylem and secondary phloem.

Importance
The presence of interfascicular cambium allows the plant to increase its girth over time, enabling it to grow taller and compete for light and other resources. It also contributes to the formation of wood, which is a valuable resource for various purposes such as construction, furniture, and paper production.

In conclusion, interfascicular cambium is an example of secondary meristem. It develops between the primary xylem and primary phloem in woody plants and is responsible for the production of secondary xylem and secondary phloem, contributing to the increase in girth of the plant stem during secondary growth.

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