pollen tube वाक्य
उदाहरण वाक्य
मोबाइल
- The sperm are transferred from the pollen through the pollen tube.
- During germination, the tube cell elongates into a pollen tube.
- Hydration and activation continue as the pollen tube begins to grow.
- In angiosperms, only a pollen tube enters the micropyle.
- The pollen tube proceeds to release the two sperm in the megagametophyte.
- Pollen germination has three stages; hydration, activation and pollen tube emergence.
- glucan synthase genes expressed in pollen tubes of Nicotiana alata " ..
- It may grow a pollen tube and undergoing mitosis to produce two sperm nuclei.
- In botany and palynology, the surface apertures through which the pollen tube germinates.
- The sperm cells are carried to their destination in the tip of the pollen tube.
- Another report states that pollen tubes do not change growth direction under AC electric fields.
- The growth of the pollen tube is controlled by the vegetative ( or tube ) cytoplasm.
- Inaperaturate pollen grains often have thin walls, which facilitates pollen tube germination at any position.
- Lipids at the surface of the stigma may also stimulate pollen tube growth for compatible pollen.
- From here, a pollen tube seeks out the female gametophyte and if successful, fertilization occurs.
- Tip growth occurs in algae ( e . g ., root hairs and pollen tubes ).
- Once the pollen tube successfully attains an ovule, it delivers the two sperm cells with a burst.
- In chalazogamous plants, the pollen tubes enter the ovule through the chalaza instead of the micropyle opening.
- The sperm nuclei reach the eggs through fertilization tubes, similar to the pollen tube mechanism in plants.
- It is an outgrowth of the placenta, important in nourishing and guiding pollen tubes to the micropyle.
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