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 [...]
The tapetum on the basis of its behaviour is divided into two main types: 1. Amoeboid 2. Secretory Tapetum. Type # 1. Amoeboid or Invasive or Periplasmodial Tapetum: This type of tapetum is seen in Alisma, Butomus, Tradescantia, Typha, etc. where, the tapetal cells fuse among themselves to form a tapetal periplasmodium. The protoplast of the fused tapetal cells move [...]
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 [...]