Scientists have found evidence that honey plants have the ability to hear bees flying around them, which motivates them to produce sweeter nectar. The role of "ears" is played by flowers.
Based on observations of the Drummond evening primrose (Oenothera drummondii), scientists have found that a few minutes of bee buzz is enough for the concentration of sugar in the nectar to increase by 20%. This ability, in their opinion, maximizes the ability of plants to spread pollen.
Several experiments were carried out with 650 evening primrose flowers, in which the level of nectar produced was measured in silence and with sounds of buzzing at three different frequencies for three minutes.
The results confirmed the scientists' assumptions: in conditions of silence, there was no effect, but when playing a recording of humming bees and low-frequency sounds that closely coincide with the recording, the quantity and quality of nectar increased.
In the next experiment, flower petals were removed from some plants, which also led to zero results. The conclusion of scientists: flowers perform the function of "ears", catching the bee's buzz, which is so important for the plant.