Which are the three cells found in a pollen grain when it is shed at the three celled stage ?
Which are the three cells found in a pollen grain when it is shed at the three celled stage ?
In $60 \%$ angiospermic plants, pollen grain is at two celled state (vegetative cell and generative cells) and in remaining species pollen grain is at three celled state at that time generative cell gets converted into two male gametes by under going mitosis. Thus in $3$ -celled state there is a vegetative cell and two male gametes.
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Diagram showing entry of pollen tube to the embryo sac. Identify $A$ to $G$ in the diagram
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Growth of pollen tube towards embryo sac is
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- [AIIMS 2000]
Name the part of gynoecium that determines the compatible nature of pollen grain.
Name the part of gynoecium that determines the compatible nature of pollen grain.
$A$ : Initial growth of pollen tube takes place on expenditure of food present in the stigma and style.
$R$ : Pollen tube travels intracellularly and chemotactically.
$A$ : Initial growth of pollen tube takes place on expenditure of food present in the stigma and style.
$R$ : Pollen tube travels intracellularly and chemotactically.