Explain the role of tapetum in the formation pollen-grain wall.
Explain the role of tapetum in the formation pollen-grain wall.
Tapetum is the innermost layer of the microsporangium. It provides nourishment to the developing pollen grains. During microsporogenesis, the cells of tapetum produce various enzymes, hormones, amino acids, and other nutritious material required for the development of pollen grains. It also produces the exine layer of the pollen grains, which is composed of the sporopollenin.
Similar Questions
Describe the structure of pollen grain and explain the development of male gametophyte in it.
Describe the structure of pollen grain and explain the development of male gametophyte in it.
...........and.......... pollen loose viability within $30$ minutes
...........and.......... pollen loose viability within $30$ minutes
Diameter of pollen grain
Diameter of pollen grain
$A$ : The generative cell comes to lie freely in the cytoplasm of the tube cell.
$R$ : Cellulosic wall around generative cell is dissolved.
$A$ : The generative cell comes to lie freely in the cytoplasm of the tube cell.
$R$ : Cellulosic wall around generative cell is dissolved.
How many meiotic divisions are necessary to produce $100$ pollen grains
How many meiotic divisions are necessary to produce $100$ pollen grains
- [AIPMT 1995]