The process of flower fertilization is a complex one that requires a perfect union between a single pollen tube and a single ovule, which contains sperm. According to recent studies the exact method how the flowers are able to reproduce with such expert precision.
The researchers reported that when a gamete fusion event occurs, is the moment when the two sperm cells from a pollen tube unite with the two female gametes in the ovule so that all other pollen tubes are repelled, and directed toward other ovules for the fertilization of flower.
When this fusion process is successful then this mechanism is triggered to tell the other pollen tubes to go away, it is said by Mark Johnson, who is a molecular geneticist at Brown University and an author of the study, reported that useful information in the journal Current Biology.
Dr. Johnson said, still the reason of the causes of redirecting is not clear, most probably there is some kind of molecule is triggered that repels the other pollen tubes.
The repelling feature for a flowering plant helps the flowers to attain maximum reproductive success as in case of Arabidopsis the ovules should not go to waste in flowers.
This is the reason why flowering plants have been more successful in colonizing the earth than other plants.