wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Why are angiosperm anther called dithecous? Describe the structure of its microsporangium.

Open in App
Solution

  • The anther of androecium of angiospermic flowers are bilobed and each lobe is divided into two parts or theca. Thus, the anther of angiospermic flowers are called dithecous
  • A typical microsporangium is surrounded by four layers - epidermis, endothecium, middle layer and tapetum.
  • The outer 3 layers ie., epidermis, endothecium and middle layer are protective in function and help in dehiscence of anther to release pollen grains.
  • Tapetum (innermost layer) nourishes the developing pollen grains and the cells of tapetum generally have more than one nucleus.
  • When the anther is young, a group of compactly arranged homogenous cells called sporogenous tissue occupy the centre of each microsporangium.

1023307_513167_ans_1f271e1903424d53aa30657c3a931aae.PNG

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Male Reproductive Part
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon