Tag Archives | Palynology

Meiosis of Microspore Mother Cell

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 [...]

By |2016-11-28T11:16:50+00:00November 28, 2016|Microsporogenesis|Comments Off on Meiosis of Microspore Mother Cell

Self Incompatibility in Plants | Palynology

In this article we will discuss about:- 1. Meaning of Self-Incompatibility 2. Molecular Basis 3. Determinants 4. Significance. Meaning of Self-Incompatibility: Self-incompatibility or intraspecific incompatibility is a well-designed genetic mechanism by which certain plants recognize and reject their own pollen thus forcing outbreeding. It is defined as "inability of the plant producing functional gametes to set seed upon self-pollination",. Lundqvist [...]

By |2016-11-28T11:16:50+00:00November 28, 2016|Palynology|Comments Off on Self Incompatibility in Plants | Palynology

Tapetum Type: 2 Main Types of Tapetum | Anther Wall

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 [...]

By |2016-11-28T11:16:50+00:00November 28, 2016|Microsporogenesis|Comments Off on Tapetum Type: 2 Main Types of Tapetum | Anther Wall
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