Read this essay to learn about:- 1. Origin and Distribution of Collenchyma Tissue 2. Cell Structure 3. Functions. Essay # 1. Origin and Distribution of Collenchyma Tissue: Ontogenetically, collenchyma cells develop from certain elongated cells resembling procambium which are formed in the very early stages of differentiation of the meristem. Sometimes less specialised collenchyma originates from the ground meristem. Some [...]
In this article we will discuss about the transverse sections of petiole of some flowers:- 1. Cucurbita 2. Sunflower 3. Piper Betle 4. Waterlily. 1. Cucurbita: A transverse section through the petiole of Cucurbita shows the following anatomical features (Fig. 5.124): It is wavy in outline having distinct ridges and furrows and a large cavity at the centre. (i) Epidermis: [...]
Read this essay to learn about the structure of a cell wall. Most of the plant cells have tough and semi rigid cell wall which is non-living in nature. The presence of this wall in plant cells distinguishes them from animal cells. The cell wall was actually noticed by the early workers in the seventeenth century long before the protoplasm [...]