The researchers have come up with a whole batch of explanations for what may have killed the plants, which means they really don't know, Cahill says. They wondered if somehow, just by being there, they had managed to kill the plants.
And some apparently just couldn't care less.
Some plants like the Maiden-Hair fern dont like the oils from your fingers, they are very sensitive and the oil can hinder their growth.
Feb. 28, 2001 --
“Within 30 minutes of being touched, 10 per cent of the plant’s genome is altered. Turn on desktop notifications for breaking stories about interest? All it takes to kill some plants is the touch of the human hand, according to their research, published in the February issue of the journal Ecology.
At the very least, the experiment proves one thing, Cahill says.
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Instead, plants appear to have developed intricate stress defence systems to sense their environment and help them detect danger and respond appropriately," says Van Aken.
Its leaves looked better than the control plants, and they were free of insects. "We assumed the data was just going to get thrown out," he says.
“This involves a huge expenditure of energy which is taken away from plant growth.
Melissa Petruzzello is Assistant Editor of Plant and Environmental Science and covers a range of content from plants, algae, and fungi, to renewable energy and environmental engineering. If you live in eastern North America, you likely know to watch out for Tread-softly, also known as noseburn or finger-rot (
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Poison ivy may come to mind, but many common garden plants can also be skin irritants for sensitive people. By contrast, plants in the control group, which had not been touched, were healthy.
"We found some plants with all the leaves eaten," Cahill says. Plants such as agave or yucca have needle-sharp leaves, and getting too close can leave you with a cut or skin abrasion. She has her M.S....Plants don’t enjoy losing their leaves to herbivores and have evolved a number of ingenious strategies to deter leaf predators. "Unlike animals, plants are unable to run away from harmful conditions. The researchers studied six different plant species in 12 different plots in an old hayfield in Pennsylvania's Brandywine Valley.
"The lightest touch from a human, animal, insect, or even plants touching each other in the wind, triggers a huge gene response in the plant," he said.
They didn't want to do anything that would dramatically affect the plant, says Cahill, who has since moved on to the University of Alberta in Edmonton, where he is an assistant professor of biological science.
By contrast, plants in the control group, which had not been touched, were healthy. What they learned was quite shocking, Cahill says.
But oddly enough, some others apparently profit from the human touch.
This is one of my favourite plants in …
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But why wouldn't that have affected all six species?
So what gives here? Unfortunately for humans, several of these chemical defenses can cause painful skin reactions. Much to his surprise, Casper said she had seen the same thing with some of the plants she had been studying. When James Cahill was studying biology at the University of Pennsylvania a few years ago, he was shocked to learn that some of the plants he had been studying out in the field had died.
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