In this article we will discuss about the definition of meristem. Meristem can be defined as mitotically active centre that is restricted to specific portion of higher plants and the cells of meristem divide indefinitely by multiple mitoses thus resulting in continuous addition of new cells to the developing plant organs. The zygote, in all sexually reproducing higher plants, divides [...]
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 # [...]