Question

Inner wall of microsporangia is:

• A. Tepitame
• B. Epidermis
• C. Endothecium
• D. Middle layer

Hint:

To remember microsporangium layers easily, note that the epidermis is outermost, the tepitame forms the inner wall, and the endothecium helps in spore release.

Answer 1

The Correct Option is A

The inner wall of microsporangia is known as the Tapetum. The tapetum is the innermost cell layer of the microsporangium or pollen sac in flowering plants. It plays a crucial role in nurturing developing pollen grains and facilitating their maturation by providing necessary nutrients and regulatory molecules.

To clarify the options:

• Tepitame is assumed to be a typographical error and can be intended to mean Tapetum, which is the correct answer.
• Epidermis is the outermost cell layer involved in protection but not specific to the microsporangium's inner wall.
• Endothecium is a middle layer providing support, elasticity, and assisting in dehiscense, not the innermost layer.
• Middle layer refers to other cell layers between the epidermis and the tapetum, contributing to structural support, but not specifically the inner wall.

Answer 2

The microsporangium is a structure in seed plants where microspores develop into pollen grains. It typically has four distinct layers:

• Epidermis: The outermost protective layer.
• Tepitame: The inner wall of the microsporangium, which provides mechanical support and helps in the dehiscence process.
• Endothecium: A layer that aids in the opening of the microsporangium to release pollen.
• Middle layer: A thin layer that usually degenerates early.

Among these, the tepitame specifically forms the inner wall of the microsporangium. It plays a crucial role in protecting the developing microspores and assists in the structural integrity of the sporangium.