Hormones Help Cotton Plants Pull Potassium
Researchers found ethylene and jasmonate together switch on potassium uptake in cotton when soil potassium runs low.
Updated on Nov. 5, 2026 in Botany
Ethylene and jasmonate hormones work together to activate machinery that draws potassium into cotton plants when soil potassium is scarce. Spraying cotton leaves with both hormones raised yields in potassium-poor field soil.
Why it matters
Potassium is essential for plant growth, and the findings reveal how plants adjust nutrient uptake when soil supplies run short. The discovery points to ways of improving crop yields on nutrient-poor land.
Field tests in soil with under 60 milligrams of available potassium per kilogram showed an 11.6% gain in seed cotton yield after combined hormone sprays compared with unsprayed plants. The extraction does not indicate whether these results have been replicated in other soil types or crops.
The players
China Agricultural University
A major Chinese public research university in Beijing known for its agricultural science programs.
Zhaohu Li
A professor at China Agricultural University who led the research team on the hormone study.
Xiaoli Tian
A professor at China Agricultural University who co-led the research team on the hormone study.
The details
A team led by Professors Zhaohu Li and Xiaoli Tian at China Agricultural University mapped how two proteins linked to the jasmonate and ethylene pathways attach to DNA beside a control protein's gene and switch on the potassium transporter gene. When potassium is plentiful, two proteins hold these pathway proteins back, and the researchers reported the full study in the journal Science Bulletin.
Timeline
The study was published in Science Bulletin, with no specific publication date given in the source material.
The Big Picture
The work builds on decades of plant nutrition research at China Agricultural University, which has long focused on how crops handle nutrient shortages in Chinese soils. It advances that line of inquiry by tying hormone signaling directly to potassium transporter activity in cotton.
Farmers working on potassium-poor land could eventually benefit from crop strategies that tune hormone signaling to improve nutrient uptake. The research remains at the field-test stage, so commercial application is not yet established.
The takeaway
Plants adjust how hard they pull in nutrients based on what the soil offers, and hormone signals can drive that adjustment. Understanding these signals could help growers manage potassium more efficiently on depleted fields.
Further reading
Explore more plant science coverage in our Botany section.
Source note: This article includes information reported by Earth.
