In this article we will discuss about the two typical dicotyledonous plants which been selected for the study of internal structure of stem with the help of diagrams. 1. Young Sunflower Stems (Figs. 146 & 147): If a thin and uniform transverse section is taken from a young sunflower stem and observed under the microscope, the following plan in the [...]
Meristematic cells have some distinctive features. They are usually isodiametric and compactly arranged without leaving intercellular spaces. Cells have dense cytoplasm, very small vacuoles and quite prominent nuclei. Plastids are in the pro-plastid stage and ergastic matters are usually absent. Walls are thin, homogeneous and made of cellulose (Fig. 135). These are the characters of truly meristematic cells; departures are [...]
This article provides a diagram of monocot root. Also learn about:- 1. Exodermis 2. Origin of Lateral Roots 3. Root-Stem Transition. A monocotyledonous root has almost identical structure and plan of arrangement, of tissues, excepting the following points of difference: (1) Bundles in monocotyledonous roots are numerous and not limited, as in dicotyledonous roots; and the metaxylem cavities are wider. [...]