At Iowa State University, Seed Physiology Ph.D. student Amina Moro is advancing research that could reshape how farmers balance productivity with environmental sustainability. Her work explores how corn responds to nearby perennial groundcover, an emerging system designed to protect soil year-round, offering new insights into how crops perceive and react to competition even before it begins.
Published in the Journal of Agronomy as Spatial Proximity to Perennial Groundcover Triggers Shade Avoidance Responses in Corn, Amina’s work focuses on how corn responds to nearby perennial groundcover (PGC), a system gaining attention for its ability to protect soil year-round.
“Perennial groundcover systems are very promising because they keep the soil covered year-round, improving soil health, reducing erosion, and enhancing sustainability,” Amina explains. “But farmers are hesitant to adopt them because of concerns about competition with corn, especially early in the season.”
Her research challenges a common assumption, that competition between plants begins only when they compete for water or nutrients. Instead, she found that competition may start much earlier, through light signals that plants use to detect nearby neighbors.
At the center of Amina’s study is a concept called shade avoidance response (SAR). In simple terms, plants can “sense” when other plants are nearby even before they are physically shaded.
“When corn detects changes in light quality, it interprets it as a sign that competition is approaching,” Amina says. “It responds by growing taller and reallocating energy toward vertical growth.”
Source : iastate.edu