Question

What is the function of germ pore?
A) Emergence of radical
B) Absorption of water for seed germination
C) Initiation of pollen tube
D) All of these

Answer 1

The location on pollen grains exine, where sporopollenin is absent, is germ pore. It assists in the development of channels by intine.

Complete answer:
First we should know about germ pore to answer this question. A germ pore is a tiny pore in a fungal spore’s outer wall. It can be apical or eccentric in its position, and can be visualised as a lighter coloured region on the cell wall on light microscopy. The mushroom spore that has a pore at one end is the apical germ pore.
Now, let us find the solution from the options-

The root of a number is a radical, which may be square roots, cube roots, and so on. A radical is sometimes considered a square root. Any function identified by a root is a radical function. Thus, the option A is incorrect.
Water is absorbed by the embryo in the seed germination process, which results in the cells being rehydrated and extended. Thus, the option B is incorrect.
A germ pore is a small pore in the outer wall of the fungal pore from which the germ tube comes out. >The germ pore plays an important function in plant fertilization. It assists in the creation of pollen tube and releases male gametes during fertilisation.

Thus, the correct answer is option ‘C’ Initiation of pollen tube.

Note: In dicots, three germ pores are present and in monocots only one germ pore is present. The pollen grain on the stigma receives nutrients and water from the stigmatic secretion via its germ pores following pollination. The vegetative cell or tube expands and forms a pollen tube from the pollen grains through the germ pore.