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 [...]
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 [...]
In this essay we will discuss about the anatomy of some dicotyledonous stems:- 1. Sunflower Stem 2. Cucurbita Stem 3. Leonurus Stem 4. Calotropis Stem 5. Enhydra Stem. Essay # 1. Anatomy of Sunflower Stem: Transverse sections through the internode of a young sunflower stem (Helianthus annuus) exhibits the following tissue arrangements from the periphery to the centre (Fig. 5.86 [...]