ADVERTISEMENT
ADVERTISEMENT
photo of green, tube-like Spirogloea muscicola
photo of green, tube-like Spirogloea muscicola

Genes from Bacteria Likely Aided Plants’ Move to Land

An analysis suggests that DNA cribbed from soil microbes enabled plants’ ancestors to colonize a terrestrial environment.

Shawna Williams
Shawna Williams

Shawna joined The Scientist in 2017 and is now a senior editor and news director. She holds a bachelor's degree in biochemistry from Colorado College and a graduate certificate and science communication from the University of California, Santa Cruz.

View full profile.


Learn about our editorial policies.

ABOVE: Spirogloea muscicola algae
BARBARA AND MICHAEL MELKONIAN

The evolution of life on land is commonly depicted as a fish that grows rudimentary limbs and crawls onto a beach. But the true terrestrial pioneers were bacteria and fungi—and some of these microbes lent a helping hand to an ancestor of plants and some algae, researchers reported yesterday (November 14) in CellThe finding provides support for the controversial idea that bacteria can transfer genes not just amongst themselves, but also to more complex species. 

“That horizontal gene transfer may have contributed to the colonization of land is pretty exciting,” Pamela Soltis, a plant evolutionary biologist at the University of Florida in Gainesville who was not involved in the work, tells Science

In the study, researchers led by Michael Melkonian of the University of Duisburg-Essen in Germany and Gane Ka-Shu Wong of the University of Alberta in Canada...

Expanding their search, the researchers also found the shared genes in soil bacteria, but in no other lifeforms. They suggest that the genes hopped from soil microbes into a common ancestor of plants and the two Zygnematophyceae species. The genes are involved in processes that presumably helped the ancestor—and now, modern plants and some algae—cope with droughts and other conditions they encounter on land. “I am very convinced that the two gene families described in the paper were acquired from bacteria,” Jinling Huang, a plant biologist at East Carolina University in North Carolina who was not involved in the study, tells Science.

Melkonian tells The New York Times that it’s clear plants built on the innovations of other organisms to colonize land. “The surface of the planet was green [with life] hundreds of millions of years before the first land plants,” he says.

Shawna Williams is an associate editor at The Scientist. Email her at swilliams@the-scientist.com or follow her on Twitter @coloradan.

Interested in reading more?

photo of green, tube-like Spirogloea muscicola

The Scientist ARCHIVES

Become a Member of

Receive full access to more than 35 years of archives, as well as TS Digest, digital editions of The Scientist, feature stories, and much more!
Already a member?
ADVERTISEMENT