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. Meaning of Pollen Viability 2. Variations in the Viability of Pollen 3. Causes for the Loss 4. Factors. Meaning of Pollen Viability: Pollen viability refers to the ability of the pollen to perform its function of delivering male gametes to the embryo sac. This functional property of the pollen after their release [...]
In this article we will discuss about:- 1. Distribution of Sporopollenin 2. Chemistry of Sporopollenin 3. Production and Deposition 4. Functions. Distribution of Sporopollenin: It was first observed and named as "sporonin" by John (1814) and latter characterized by Berzelius (1830). Fossil green algae dating back to Devonian period have been shown to contain sporopollenin. The oldest sporopolleninous acritarchs occur [...]