According to a study conducted in Israel, some flowering plants can sense when a bee is near them and produce extra nectar in anticipation of the meeting! Professor Lilach Hadany, a researcher at Tel Aviv University, conducted experiments exposing Evening primroses to 5 different sound options: Silence, computer generated noises at 3 different frequencies and the sound of a honey bee at 4 inches away from the plant. With the first 4 options, there was no change in the flower’s nectar. However, within 3 minutes of playing the recorded bee sounds to the Evening primrose the sugar concentration in the nectar increased from between 12% and 17% to 20%. The study has been reproduced indoors and out and in different seasons.
Further research, using a laser virbrometer, found that the flowers vibrate to match the sounds of the bee recordings. Marine Veits, co-author of the study, points out that, “This specific flower is bowl-shaped, so acoustically speaking, it makes sense that this kind of structure would vibrate and increase the vibration within itself.”