In a flowering plant, archesporium gives rise to : -
A
Only the wall of the sporangium
B
Both wall and the sporogenous cells
C
Wall and the tapetum
D
Only tapetum and sporogenous cells
The answer is B.
Solution
In a young anther, a group of hypodermal cells in each corner becomes the archesporium. Each archesporial cell divides periclinally into an outer primary parietal cell and an inner primary sporogenous cell. The primary parietal cell divides further to form the wall layers of the microsporangium: endothecium, middle layers and tapetum. The primary sporogenous cell gives rise to the sporogenous tissue, whose cells become microspore mother cells; these form pollen grains by meiosis. So the archesporium gives rise to both the wall and the sporogenous cells.
ConceptDerivatives of archesporial cells
Sexual Reproduction in Flowering Plants in past papers
126 questions from this chapter have appeared across 26 exam years.
