Dithecous Anther – Formation of a Theca

What is Dithecous Anther?

The name “dithecous” is derived from the Greek words “di” (two) and “theca” (pollen sac). Each theca contains microscopic structures known as pollen sacs or microsporangia. Theca formation in a dithecous anther occurs when the flower’s reproductive components grow. The anther starts to form when specific cells emerge in the early stages of flower development....

Dithecous Anther Diagram

The labelled diagram of dithecous anther is given below:...

Structure of Dithecous Anther

The structure of the Dithecous anther is explained as follows:...

A Transverse Cross-Section of Dithecous Anther

A transverse cut of a dithecous anther reveals two microsporangia in each lobe, totaling four microsporangia. Pollen grains can be found in microsporangia, also known as pollen sacs. The anther resembles a plant’s male reproductive organ. It is divided into two portions, with four divisions inside where pollen is produced. These parts are known as microsporangia. Each microsporangium contains microscopic cells that produce male gametes, which resemble plant sperm. The anther has four layers around these pollen-producing sections:...

Formation of Theca in Dithecous Anther

As the flower develops, certain cells transform into new sections, such as anthers. Special cells generate small structures known as microspores (microsporogenesis) within each region of the anther. This occurs through a process known as meiosis, in which each unique cell divides into four smaller ones. These microscopic cells develop into pollen grains. Each pollen grain contains small components that aid in the formation of sperm cells. As the anther expands, specific cells within it transform into distinctive shapes known as thecae. In anthers with two thecae, each component has its own sac for pollen grain growth....

Functions of a Dithecous Anther

The anther’s major function is to produce pollen, which is similar to the plant’s sperm. The functions of the Dithecous Anther is as follows:...

Conclusion: Dithecous Anther – Formation of a Theca

The dithecous anther, which has two chambers and two pollen sacs in each, is essential for flowering plant reproduction. The pollen sacs generated within the anther are where pollen grains develop. These grains are extremely vital for plants to produce seeds via pollination and fertilisation. If something goes wrong with the formation of the theca, the pollen sacs may not grow properly, making it difficult for the plant to reproduce. Knowing about dithecous anthers allows us to better understand how flowering plants produce seeds....

FAQs on Dithecous Anther – Formation of a Theca

What is the Purpose of Theca?...