Scientists have discovered a surprising fact about pink flowers: They react to cold more strongly than other types of flowers.
The findings, published today in the journal Science, show how pink blossoms respond to changes to their environment, from cold to humidity.
“We have been working for years to understand why some flowers respond to cold and some do not,” said researcher Laura Bocchetti, a plant scientist at UC Davis.
“This study provides a clue to explain why some of them can be so attractive, and why others are so cold-sensitive.”
A few species of flower, including tulip, have been known to be cold-sensitive.
The new study was done with two species of marigolds that are very similar, the most famous being Marigold azure.
The researchers first tested whether pink flowers responded to different types of cold, and they found that the marigod’s responses were stronger when the temperature dropped.
The team then looked at the effect of changing humidity, and the results were more surprising: Marigolds with a high degree of humidity tended to respond more strongly to changes from low humidity to high humidity.
They also had a greater effect on how the flower would respond to a temperature change that was lower than its previous low.
When the researchers looked at how cold- sensitive the flower was, they found some flowers that responded better to low humidity and others that responded less well.
These differences in response led the researchers to hypothesize that the higher the humidity, the more sensitive the pink flowers were to cold.
“There are lots of flowers that are sensitive to temperature changes,” said Bocheli.
“For example, marigood azure is very sensitive to the sun’s warmth.
So that’s what we’re trying to figure out is, what does it mean to be sensitive to these different types?”
The researchers used a new technique to determine the chemical makeup of marigs.
Marigood roses are a group of flowering plants that grow along a branch of the Marigandel tree, a type of flowering plant that produces more than 300 different flowers.
Researchers have been looking for different kinds of plants with different chemical makeup that respond to different kinds and amounts of sunlight.
The scientists looked at all of the different chemicals present in these plants, and then tested them for how they react to different conditions.
The study was part of a larger project that looked at this plant’s chemical makeup and how it interacts with its environment.
The chemical makeup in marigods depends on a variety of factors, including the plant’s age, where the plant was collected, what it was grown in and whether it had been exposed to different environmental conditions, Bocheri said.
The work is part of an ongoing study of the chemical composition of maragolds in the Mariglobal plant family, which includes marigots, marigs, maricots and marigotas.
“It’s been a long journey and we’re just getting started,” Boccheri said of the research.