193 citations,
February 2015 in “Nature Communications” Fungi-produced compounds can change plant root growth.
2 citations,
July 2023 in “Agronomy” Melatonin helps wheat plants resist drought by improving their root and root hair growth.
Plant roots respond to fungus smells by possibly using certain proteins and a plant hormone to change root growth, but more research is needed.
44 citations,
August 2008 in “Plant journal” D'orenone stops root hair growth by disrupting auxin transport, but adding auxin can reverse this.
Melatonin improves tomato root growth and plant health at certain levels by affecting genes and hormones but can damage roots at high levels.