Follow for more talkers

Otherworldly scenes show plants breathing in close-up detail

Knowing how plants sense carbon dioxide to signal their "mouths" - stomata - to open and close in response to changing carbon dioxide levels could allow scientists to produce crops robust enough for a changing environment.

Avatar photo

Published

on
A highly magnified view of a single stoma on the leaf of a boat lily (Tradescantia spathacea). (Douglas Clark/NSF via SWNS)

By Dean Murray via SWNS

It looks like a scene from a horror movie, but eerie research shows plants breathing in close-up detail.

A new study reveals biologists are gaining new insight into the intricate process, with big implications for how to feed the world in the future.

Researchers at the University of California San Diego, funded by the U.S. National Science Foundation (NSF), along with collaborators in Estonia and Finland, have found an elusive molecular pathway that plants use to direct their "breathing" of carbon dioxide.

Knowing how plants sense carbon dioxide to signal their "mouths" - stomata - to open and close in response to changing carbon dioxide levels could allow scientists to produce crops robust enough for a changing environment.

A highly magnified view of a single stoma on the leaf of a boat lily (Tradescantia spathacea). (Douglas Clark/NSF via SWNS)
« of 4 »

Jared Dashoff, National Science Foundation spokesperson, said "The researchers hope that harnessing this mechanism could lead to future engineering of plant water use efficiency and carbon intake, critical as atmospheric carbon dioxide concentration continues to increase.

"In fact, the researchers have filed a patent and are examining ways to translate their findings into tools for crop breeders and farmers."

The process, described in research published in Science Advances, becomes clearer on the microscopic level.

On the underside of leaves and elsewhere, depending on the plant, are tiny openings called stomata — thousands of them per leaf with variations by plant species.

Dashoff said: "Like little castle gates, pairs of cells on the sides of the stomatal pore — known as guard cells — open their central pore to take in the carbon dioxide.

"However, when stomata are open, the inside of the plant is exposed to the elements and water from the plant is lost into the surrounding air, which can dry out the plant.

"Plants, therefore, must balance the intake of carbon dioxide with water vapor loss by controlling how long the stomata remain open."

Research leader Julian Schroeder, Torrey Mesa Research Institute chair in plant science at UC San Diego, said: "The response to changes is critical for plant growth and regulates how efficient the plant can be in using water, which is important as we see increased drought and rising temperatures."

As the climate changes, both atmospheric carbon dioxide concentration and temperature increase, affecting the balance between carbon dioxide entry and water vapor loss through the stomata.

If plants, especially crops like wheat, rice and corn, can't strike a new balance, they risk drying out, farmers risk losing valuable output, and more people across the world risk going hungry.

Even with advances in agriculture, an NSF-funded study in published in 2021 found that global agricultural productivity over the past 60 years is still 21% lower than it could have been without climate change.

Dashoff said: "Scientists have long understood stomata and the balance between carbon dioxide intake and water loss. What they haven't known, until now, is how plants sense carbon dioxide to signal stomata to open and close in response to changing carbon dioxide levels.

"Knowing this will now enable researchers to edit those signals — so plants can strike the right balance between taking in carbon dioxide versus losing water — and allow scientists and plant breeders to produce crops robust enough for the environment of the future."

Richard Cyr, an NSF program director who studied plant cell biology prior to joining the agency, adds: "Determining how plants control their stomata under changing CO2 levels creates a different kind of opening — one to new avenues of research and possibilities for addressing societal challenges."

Stories and infographics by ‘Talker Research’ are available to download & ready to use. Stories and videos by ‘Talker News’ are managed by SWNS. To license content for editorial or commercial use and to see the full scope of SWNS content, please email [email protected] or submit an inquiry via our contact form.

Top Talkers