In this article we will discuss about:- 1. Distribution and Arrangement of Fibre 2. Shape, Structure and Content of Fibre 3. Types 4. Functions 5. Sources and Uses. Fibre is narrow, elongated cell with thick lignified wall and narrow lumen tapering to a wedge-shape at both ends. Distribution and Arrangement of Fibre: Fibre occurs in the ground and vascular tissues [...]
The following points highlight the top six factors influencing differentiation of sclereids cells in plants. The factors are: 1. Ageing 2. Wounding 3. Position 4. Osmotic Pressure 5. Enzyme 6. Hormone. Factor # 1. Ageing: In the barks many parenchyma cells change to brachysclereids. It is regarded that the sclereid differentiation is due to ageing of the tissues. Factor # [...]
In this article we will discuss about:- 1. Origin and Development of Vessel 2. Phylogeny of Vessel. Origin and Development of Vessel: Trachea (or vessel) originates from meristematic cells (Fig. 10.4) that are grouped together in a longitudinal file. The meristematic cells are known as xylem mother cell that develops from procambial cells in the primary xylem. In secondary xylem [...]