How does pollen develop?

Development of pollen grains (male gametophytes) takes place in the anther. Pollen development begins when specialized cells (microsporocytes) differentiate in young anthers. There are generally hundreds or thousands of microsporocytes per anther and each passes through meiosis to produce four haploid microspores.

How are Microsporocytes formed?

During microsporogenesis the diploid sporogenous cells differentiate as microsporocytes (pollen mother cells or meiocytes) which divide by meiosis to form four haploid microspores. This phase begins with the expansion of the microspore which is commonly associated with the formation of a single large vacuole.

What do Microgametophytes develop into?

each microspore develops into a microgametophyte (male gametophyte), which ultimately produces male gametes (sperm), and each megaspore produces a megagametophyte (female gametophyte), which ultimately produces female gametes (eggs).

What is the development of pollen grains in angiosperms called?

In a plant’s male reproductive organs, development of pollen takes place in a structure known as the microsporangium (Figure 1). The microsporangia, which are usually bilobed, are pollen sacs in which the microspores develop into pollen grains.

Where does microgametogenesis occur in a flowering plant?

Microgametogenesis is the process in plant reproduction where a microgametophyte develops in a pollen grain to the three-celled stage of its development. In flowering plants it occurs with a microspore mother cell inside the anther of the plant.

Which is the outcome of microsporogenesis and microgametogenesis?

Production of pollens is the outcome of microsporogenesis. Production of male gametes is the outcome of microgametogenesis. Microsporogenesis is a process of formation of pollen grains (microspores) from the sporogenous tissue. As a general fact, during this process, a microgametophyte develops inside a pollen grain.

Where does the microsporangia develop in a plant?

The microsporangia are developed inside the corners of the 4-lobed anther. Young anthers are more or less oblong in shape in section and made up of homogeneous mass of meristematic cells without intercellular space (Fig. 3.1 A). With further development, the anther becomes 4-lobed. The outer layer of anther is called epidermis.

What is the role of archesporial cells In megasporogenesis?

The archesporial cell divides transversely and forms an inner primary sporogenous cell and an outer primary parietal cell (Fig. 3.6B). The primary sporogenous cell functions as mega­spore mother cell (Fig. 3.6C) and the primary parietal cell undergoes repeated vertical divi­sions and forms layers of parietal cells (Fig. 3.6C).