The two nuclei at the end of the pollen tube are called
a.Tube nucleus and a generative nucleus
b.Sperm and ovum
c.Generative nucleus and stigma d.Tube nucleus and sperm
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The two nuclei at the end of the pollen tube are called Tube nucleus and generative nucleus .
Correct option is (a) Tube nucleus and generative nucleus.
- After pollination process, the pollen grains germinate into pollen tube .
- The pollen tube travels through stigma and style and reaches the ovules in the ovary .
- Then the generative nucleus divides into two male gametes in which one fuses with egg and the other one fuses with pollen nuclei.
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The two nuclei at the end of the pollen tube are called tube nucleus and a generative nucleus.
- The pollen in most of the plants is released at the two-celled stage.
- These two cells are the tube nucleus and the generative nucleus.
- The pollen lands on the stigma. The pollen undergoes pollen-pistil interaction and the pollen tube originates from the germ pore of the pollen.
- The vegetative nucleus has abundant nutrients and the generative cell further divides to form 2 male gametes.
- One male gamete fuses with the egg cell and the other male gamete fuses with the central cell to form a secondary endosperm nucleus.
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