In this article we will discuss about the anatomy of anther. 1. Anther Initiation: The dynamics of anther development and differentiation depend on the co-operative interactions between cell populations. The anther normally consists of two lobes, each with two elongated microsporangia or pollen sacs. The anther lobes are fused together by the connective tissue (Fig 1.1). The filament connects the [...]
In this article we will discuss about:- 1. Morphology of Orbicules 2. Development of Orbicules 3. Functions. Ubisch bodies were first discovered by Rosanoff (1865) in close association with the tapetum. Kosmath (1927) suggested that these bodies should be called "Ubisch granules" while Erdtman (1961) proposed the term "orbicules". Morphology of Orbicules: Orbicules are small and generally spherical structures (2-5 [...]
In this article we will discuss about:- 1. Callose Wall and Meiocytic Syncytium 2. Ultra-Structural Changes in Microsporocytes 3. Cytokinesis. The sporogenous cells generally function directly as microspore mother cell, also called microsporocyte or pollen mother cell. They undergo meiotic division to give rise to microspore tetrads. This division is of tremendous importance in the life cycle of the Pteridophytes [...]