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A sunflower's dense yellow petals (technically an "inflorescence," or collection of many flowers) are a familiar sight, but it hides something from the human eye: an ultraviolet (UV) bullseye pattern, invisible to humans, But most insects, including bees
These bullseye patterns have long been known to make flowers more attractive to pollinators by increasing their visibility
"Unexpectedly, we noticed that the flowers of sunflowers grown in dry climates had larger UV bullseyes and found that these flowers were more efficient at retaining water
In 2016 and 2019, Dr.
The researchers found that a single gene, called hammyb111, was responsible for the diversity of UV patterns in flowers
"The UV patterns of flowers thus appear to play at least a dual role in adaptation; in addition to their well-known role in promoting pollination, they also regulate flower water loss," said senior author Roland R.
Sunflowers are grown for a variety of purposes, including the production of sunflower oil, an industry worth about $20 billion by 2020
The researchers also want to better understand how HaMYB111 regulates the size of the UV bullseye, and to study in more detail how these patterns affect plant physiology and how exactly flavonol compounds affect water loss
Journal Reference :
Marco Todesco, Natalia Bercovich, Amy Kim, Ivana Imerovski, Gregory L Owens, Óscar Dorado Ruiz, Srinidhi V Holalu, Lufiani L Madilao, Mojtaba Jahani, Jean-Sébastien Légaré, Benjamin K Blackman, Loren H Rieseberg .
