Anatomy of Flowering Plants- Solutions
1.State the location and function of different types of meristems.
Meristematic tissue (meristem) is composed of cells that are immature, not fully differentiated, and which possess the power of cell division. The cells are closely arranged are full of cytoplasm with prominent nucleus. Meristems are classified according to their origin and position.
Classification of meristem according to origin:
According to origin, meristem is divided into three types:
Primary meristem: This is composed of cells that are direct descendants of embryonic cells. It arises from promeristem and is present on apices of root, stem and leaf. It gives rise to many permanent tissues making the fundamental structures of the plant body.
Secondary meristem: Primary meristems gradually differentiate into tissues. Some living permanent cells may regain the power of cell division, which constitute secondary meristem.
Promeristem: This meristem originates from an embryo. Hence, it is called promeristem, primordial or embryonic meristem. It is present where an organ or a part of a plant is initiated.