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 of Xylem Parenchyma 2. Phylogeny of Ray Parenchyma 3. Phylogeny of Axial Parenchyma. Origin of Xylem Parenchyma: Xylem parenchymas cells are present both in primary and secondary xylem; accordingly their origin also differs. In primary xylem they originate from procambium. In secondary xylem ray parenchyma cells originate from the ray initials [...]