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Home » UF/IFAS is sending plants to space
STELLAR RESEARCH ... Comments

UF/IFAS is sending plants to space

UF/IFAS researchers to launch new plants-in-space mission

PUBLISHED ON February 8, 2017

Researchers want to know more about how gene expression helps plants to adapt themselves to outer space. (Olli Henze, Flickr/Creative Commons)

GAINESVILLE, Fla. — People put on sweaters when they’re cold. Plants on the other hand, have to essentially knit one on the fly. Plants “knit” with their genes, and when University of Florida Institute of Food and Agricultural Sciences researchers launch their Feb. 14 space experiment, they want to know more about how gene expression helps plants to adapt themselves to outer space.

To knit that new sweater, a plant will need to find a new pattern for an environment to which it has never been exposed, said UF/IFAS horticultural sciences research professor Anna-Lisa Paul. This is what a plant faces when it grows in space. It’s a novel environment, outside the evolutionary experience of any plant, so the plant needs to experiment with new patterns.

The space launch from the Kennedy Space Center is the latest in a series of experiments performed by Paul and UF/IFAS horticultural sciences professor Robert Ferl as they seek to understand how to grow plants in space.

Plants on the SpaceX CRS-10 mission will end up at the International Space Station.

“Scientists have been studying plants in space for decades, and although recent advances have made us better gardeners, plants still know that they are growing in a world without gravity, and they work to adjust their physiology to this environment,” Paul said.

In this experiment, Paul and Ferl are delving deeper into the way plants respond to spaceflight by looking at a special feature of their genetic material. The genetic material of a plant or animal — referred to as the “genome” — has extra features other than just the DNA base pairs.

For the APEX04 spaceflight experiment, scientists will grow experimental plants aboard the ISS, harvest in orbit and then return the plant samples to Earth. Once returned to UF/IFAS lab, scientists will sequence the genomes to see how changes in DNA-methylation — a mechanism used by cells to control gene expression — contribute to the spaceflight response.

“We can follow the steps in that process by examining how the patterns of gene expression change between the plants grown in space, and those grown on the ground,” Paul said.

“Learning how a plant copes with the challenge of spaceflight contributes to our understanding of how plants might respond to new and challenging environments here on Earth as well,” Paul said. “And of course, the more complete our understanding of spaceflight responses, the more success we will have in future missions, as we take plants with us off our planet.”

—Brad Buck
UF|IFAS

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