Μετάφραση και ανάλυση λέξεων από την τεχνητή νοημοσύνη ChatGPT
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Τι (ποιος) είναι pollen$62115$ - ορισμός
.jpg?width=200 "Mechanism to prevent self pollination and allowing compatible pollen to grow a pollen tube for fertilization to take place")
![European honey bee]] carrying pollen in a [[pollen basket]] back to the hive](https://commons.wikimedia.org/wiki/Special:FilePath/Apis mellifera flying.jpg?width=200 "European honey bee]] carrying pollen in a [[pollen basket]] back to the hive")
![Pollen microspores of ''[[Lycopersicon esculentum]]'' at coenocytic tetrad stage of development observed through oil immersion microscope; the chromosomes of what will become four pollen grains can be seen.](https://commons.wikimedia.org/wiki/Special:FilePath/Coenocytic Tetrad.gif?width=200 "Pollen microspores of ''[[Lycopersicon esculentum]]'' at coenocytic tetrad stage of development observed through oil immersion microscope; the chromosomes of what will become four pollen grains can be seen.")
![''[[Diadasia]]'' bee straddles flower [[carpels]] while visiting yellow ''[[Opuntia engelmannii]]'' [[cactus]]](https://commons.wikimedia.org/wiki/Special:FilePath/Diadasia Bee Straddles Cactus Flower Carpels close-up.jpg?width=200 "''[[Diadasia]]'' bee straddles flower [[carpels]] while visiting yellow ''[[Opuntia engelmannii]]'' [[cactus]]")
![rockrose]].](https://commons.wikimedia.org/wiki/Special:FilePath/Episyrphus balteatus - head close-up (aka).jpg?width=200 "rockrose]].")
![Tulip [[anther]] with many grains of pollen](https://commons.wikimedia.org/wiki/Special:FilePath/Tulip Stamen Tip.jpg?width=200 "Tulip [[anther]] with many grains of pollen")
![Triporate pollen of ''[[Oenothera speciosa]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Oenothera speciosa pollen 200x.jpg?width=200 "Triporate pollen of ''[[Oenothera speciosa]]''")
![Pollen of ''[[Lilium auratum]]'' showing single sulcus (monosulcate)](https://commons.wikimedia.org/wiki/Special:FilePath/Lilium auratum - pollen.jpg?width=200 "Pollen of ''[[Lilium auratum]]'' showing single sulcus (monosulcate)")
![''[[Arabis]]'' pollen has three colpi and prominent surface structure.](https://commons.wikimedia.org/wiki/Special:FilePath/Arabis voch1-4.jpg?width=200 "''[[Arabis]]'' pollen has three colpi and prominent surface structure.")
![Pollen of [[Lilium bulbiferum]] on an insect's hair under microscope](https://commons.wikimedia.org/wiki/Special:FilePath/Fire lily pollens on an insect's hair.jpg?width=200 "Pollen of [[Lilium bulbiferum]] on an insect's hair under microscope")
Βικιπαίδεια
A pollen tube is a tubular structure produced by the male gametophyte of seed plants when it germinates. Pollen tube elongation is an integral stage in the plant life cycle. The pollen tube acts as a conduit to transport the male gamete cells from the pollen grain—either from the stigma (in flowering plants) to the ovules at the base of the pistil or directly through ovule tissue in some gymnosperms. In maize, this single cell can grow longer than 12 inches (30 cm) to traverse the length of the pistil.
Pollen tubes were first discovered by Giovanni Battista Amici in the 19th century.
They are used as a model for understanding plant cell behavior. Research is ongoing to comprehend how the pollen tube responds to extracellular guidance signals to achieve fertilization.
