Con artists and traffic wardens: the secret lives of flowers

How do bees maintain a healthy bee lifestyle and how do plants manipulate their pollinators? These questions and many more will be answered this Sunday [May 21] when the University of Bristol Botanic Garden celebrates the fourth international Fascination of Plants Day.

Tom Timberlake, a PhD student in the University’s School of Biological Sciences, will be at Garden to explain how plants manipulate their pollinators in many ways by using scent, taste, appearance or even mind-altering chemicals to persuade pollinators to visit them and spread their pollen far and wide.

Tom said: “A priority for most plants is to ensure they receive pollen from distant plants, not just their own flowers. Foxglove flowers act as traffic wardens, ensuring bees only move from bottom to top. Flowers at the bottom of the plant produce more nectar than those at the top. This ensures that bees arrive to the bottom of the plant where the flowers are female. They deposit pollen brought from other plants before moving upwards towards the less nectar rich male flowers at the top. This one-way traffic prevents pollen moving between flowers on the same plant.”

The flowers of coffee plants contain tiny amounts of caffeine in their nectar which enhances a bee’s memory of that nectar and encourages them to pollinate other coffee flowers. Bee orchids, on the other hand, mimic both the appearance and smell of a female bee. When the male begins to mate, he triggers the release of pollen which is transported onto the next flower.

In addition to talking to the public about the weapons used by flowers, Tom will also be explaining about the importance of a balanced diet for bees. While nectar is the main source of energy for bees, it contains far more than just sugar. Amino acids, ions, fats, antioxidants and anti-microbial compounds are all part of its rich cocktail of ingredients Different plants contain different combinations of these ingredients and some will only be found in specific ones. Visiting a range of different plant species is therefore critical to maintaining a healthy bee lifestyle.

Nicholas Wray, curator of the Botanic Garden, added: “This year’s Fascination of Plants Day will give visitors the opportunity to visit the Garden and meet with and chat to one of the University’s young researchers.  They will also be able to explore the Garden where they will see a wealth of truly fascinating plants.”

The Fascination of Plants Day 2017 at the University of Bristol Botanic Garden will take place on Sunday 21 May from 10 am to 4.30 pm.  Tom Timberlake will be discussing his work in the Denvers Room.

Entry to the Fascination of Plants Day is £5.50 adults; free to University staff and retired staff, Friends of the Botanic Garden, ALL students and children under 18.