In this article we will discuss about the secondary growth in dicot stem. A. In the Intra-Stelar Region: The secondary growth always begins in the intra-stelar region. The meristematic cells of the cambium of the vascular bundles, called fascicular cambium, begin to divide and produce new cells on the outer and inner sides. (Fig. 158) Almost simultaneously a few parenchymatous [...]
The following points highlight the three main types of modifications of stems. The types are: 1. Sub Aerial Modifications 2. Underground Modifications 3. Aerial Modifications or Metamorphosed Stems. Type # 1. Sub Aerial Modifications: Slender branches develop from the axils of the leaves of some plants which usually run horizontally on the surface of the soil. Most of them are [...]
The following points highlight the two main exercises to study various types of branching in stems. Exercise 1: To study various types of branching in stems. Requirements: Plants or models showing various types of branching. Branching in Stems: There are two main types of branching in stems: (i) lateral branching, and (ii) dichotomous branching. (A) Lateral Branching: In this type, [...]