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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Pollen pistil interaction is
Pollen pistil interaction is
In the diagram given below, show the path of a pollen tube from the pollen on the stigma into the embryo sac. Name the components of egg apparatus.
In the diagram given below, show the path of a pollen tube from the pollen on the stigma into the embryo sac. Name the components of egg apparatus.
$A$ : 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.
In the figure given below label the following parts : male gametes, egg cell, polar nuclei, synergid and pollen tube
In the figure given below label the following parts : male gametes, egg cell, polar nuclei, synergid and pollen tube
Describe pollen-pistil interaction
Describe pollen-pistil interaction