Question

What is floral primordium?

Answer 1

A primordium is an organ or a tissue in its earliest recognizable stage of development. Cells of the primordium are called primordial cells. A primordium is the simplest set of cells that are capable of triggering the growth of the organ and is also the initial foundation from which an organ is able to grow. In flowering plants, a floral primordium develops into a flower.

Complete answer:
Plants produce both leaves as well as flower primordia cells at the shoot apical meristem. Primordium development in plants is very critical to the proper positioning and development of plant organs and cells. The process of primordium development is regulated by a set of genes that affects the positioning, growth and also differentiation of the primordium. Genes such as STM which stands for shoot meristems and CUC which is cup-shaped cotyledon are involved in defining the borders of the newly formed primordium.

Floral primordia are referred to as the formation of little buds at the end of stems from which a flower can develop. Primordium formation begins at the fast and anisotropic growth at the periphery of the shoot apical meristem. It is a tissue or a colony of cells that will trigger the formation of an organ before its formation.

Therefore, we can say that a floral primordium is a group of cells or even a tissue in an angiosperm or a flowering plant that gives rise to a flower.

Note: Auxin is a group of plant hormones or phytohormones, which plays a key role in all areas of the growth and development in plants. Auxin concentration affects mitosis, cell expansion, and also cell differentiation. Floral primordia start off as a crease or indentation and later form into a bulge.