Advertisements
Advertisements
प्रश्न
Describe the structure of its microsporangium.
Advertisements
उत्तर
A microsporangium is a cylindrical sac which appears circular in the transverse section. It contains the following parts:
(1) Outer wall
(2) Central homogeneous sporogenous tissue
(3) Epidermis
(4) Endothecium
(5) 1–3 middle layers and tapetum
The outer three layers perform the function of protection in the younger anther andthe mechanism of dehiscence in the ripe anther.The endothecial cells develop fibrous thickening of α-cellulose on the inner and radial walls and die. The innermost layer is called the tapetum. It nourishes the developing pollen grain.
APPEARS IN
संबंधित प्रश्न
Fill in the blank:
Male sex cells in plants are called _________.
Can a unisexual flower be self pollinated?
State four features of flowers pollinated by insects.
Can a plant flowering in Mumbai be pollinated by pollen grains of the same species growing in New Delhi? Provide explanations to your answer.
A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by ______.
Plants with ovaries having only one or a few ovules are generally pollinated by ______.
Which of the following plant contain unisexual flower?
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
Which of the following floral adapation are adapted by hydrophilous flowers?
Name the pollinating agent of a flowering plant with large and coloured flowers with sticky stigma. State one characteristic feature of the pollen grains produced in such flowers.
