Liverwort Stalks Pump Water Against Gravity
Researchers found the outer surface of the female common liverwort stalk moves water upward to eggs at its top.
Updated on Nov. 7, 2026 in Botany
Common liverwort females hold their eggs up on a short stalk away from damp ground, and the outside of that stalk carries water upward, against gravity, to the eggs. Researchers reported the findings in the journal Nature Plants.
Why it matters
The flow depends on several kinds of tiny structures placed in precise positions relative to each other, showing how a simple plant organ can solve a physical problem. Understanding how the stalk develops may clarify how plants evolved structures that move water through their bodies.
Researchers used three-dimensional X-ray imaging to map the tiny structures on the stalk and their positions relative to one another. The extraction does not report measured flow rates or heights for water movement.
The players
Chinese Academy of Sciences
A major national research institution in China whose researchers, including lead author Bo Xu, conducted the study.
The details
Researchers mapped the structures on the female stalk and found that several kinds of tiny structures, placed in precise positions, drive the upward flow. One protein, MpLAS, controls how these surface structures develop, while a second protein, MpGRAS10, helps build the stalk and boosts two genes, MpKAOL1 and MpKAOL2, that are involved in making gibberellin-related compounds.
Timeline
The study was published in Nature Plants; the extraction gives no publication date.
The Big Picture
The female stalk evolved only once in this liverwort group, and several later lineages lost it, suggesting the structure was not a repeated solution. The stalk appeared before the surface structures that carry water, indicating an evolutionary order in which the lifting structure preceded the plumbing that makes it work.
The findings could inform how scientists think about moving water in plants, which matters for crop design and plant biology. The extraction does not state a timeline for any practical application.
The takeaway
Common liverwort shows that a plant can lift water against gravity using a stalk surface shaped by precisely placed structures. Researchers continue to map how these structures develop and how they evolved.
Further reading
Explore more plant biology stories in our Botany section.
Source note: This article includes information reported by Earth.
