Question

explain the types , location and function of meristematic tissue​

Answer 1

Answer:

Meristematic Tissue are divided into three types  on the basis of Origin:-

Promeristem

•    The earliest and youngest meristematic tissue.

•    It originates from the embryo.

•    The primary meristem arises from the promeristem.

•    It is found in the root and the shoot tips.

Primary Meristem:-

•    It arises from the promeristem.

•    Cells divide actively.

•    It is present below the promeristem and forms the permanent tissue.

Secondary Meristem:-

•    It originates from the primary meristem.

•    The permanent tissue forms from the secondary meristem.
• Meristematic Tissue On the basis of Origin

On the basis of location, meristems are of three types, apical, intercalary and lateral.

(i) Apical: It is present at the apices of stem, root and their branches.

Functions: It helps in growth in length and formation of primary tissues.

(ii) Intercalary: It is found above or below stem nodes and leaf bases.

Functions: It helps in growth of internodes, growth in leaves and correction of position in lodged stems.

(iii) Lateral: they are divided into two category:-

(a) Phellogen (Cork cambium): It develops from hypodermis in stems and pericycle in roots. Function: Formation of protective cork (phellem) and aerating lenticles on the outside and secondary cortex (phelloderm) on the inner side.

(b) Vascular Cambium: In stem form intra-fascicular cambial strips and interfascicular strips. In root from conjuctive parenchyma and pericycle. Function: Formation of secondary phloem on outside and secondary xylem on inner side. Vascular rays are formed at intervals for radial conduction.

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