In this article we will discuss about the ABC model of flower development. The ABC model of flower development in angiosperm demonstrates the presence of three classes of genes that regulate the development of floral organs. The genes are referred to as class A genes, class B genes and class C gene. These genes and the interaction between them induce [...]
This article will guide you about how to determine the plastochron index. Plastochron is defined as the time interval between the formation of one leaf primordium and the initiation of next leaf primordium. Plastochron is a developmental measure and is expressed as 'plastochron index'. The index indicates the developmental status of each leaf and relates the observation to time. The [...]
In this article we will study about the secondary structures of plant with the help of suitable diagrams. A. Stem of Aristo-lochia Sp. (Fig. 7.1): In the primary condition the stem reveals the features of a typical dicotyledonous stem, i.e., presence of uniseriate epidermis, well differentiated cortex, ring arrangement of vascular bundles which are distinctly collateral and open type, [...]