Question

why intrafascicular cambium of Dicot stem is a primary Meristem but directly forms secondary permanent tissue​

Answer 1

Answer:

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Explanation:

Cambium is a strip of meristematic cells present between the xylem and phloem in dicot plants. The primary function of the cambium is to produce the vascular tissue and hence it is called the ‘Vascular Cambium’. The vascular bundles found in the primary plant parts are also called as Fascicles.

The vascular cambium produces xylem towards the inner side and phloem towards the outer side in both stem and roots. There are two types of vascular cambium in dicot plants based on its position; they are (1) Fascicular Cambium and (2) Interfascicular Cambium.

(1). Fascicular cambium:

The cambium present between the xylem and phloem of a vascular bundle is called fascicular cambium. The fascicular cambium is also called as intrafascicular cambium since they are present inside the vascular bundle. In the beginning, the fascicular cambium is a primary meristem, later during the secondary growth; it gets transformed into a secondary meristem.

(2). Interfascicular cambium:

The cambium occupy between two vascular bundles is called interfascicular cambium. It is a secondary meristem.

During the secondary growth in a dicot stem, the fascicular and interfascicular cambium fuse together to form a continuous ring of meristematic tissue called the Vascular Cambium. The vascular cambium cut-off the secondary xylem towards its inner side and secondary phloem towards its outer side.

The present post describes the similarities and differences between Fascicular and Interfascicular Cambium.