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 anatomical features of monocotyledonous roots:- 1. Arum Root 2. Maize Root 3. Smilax Root 4. Orchid Root. Essay # 1. Anatomical Features of Arum Root (Monocotyledonous Root): A transverse section through the root of arum (Colocasia sp. of family Araceae) shows the following anatomical features (Fig. 5.106): (i) Epidermis: The uniseriate epiblema is [...]
In this article we will discuss about the stages of secondary growth in dicotyledonous root with the help of suitable diagrams. The roots of some herbaceous dicotyledons and of all gymnosperms and woody dicotyledons show secondary growth in thickness. The tissues of secondary origin in the dicotyledonous roots are basically similar to those of the stem, but the way of [...]