root-development
Root development encompasses the biological processes governing the formation, elongation, and branching of plant root systems from embryogenesis through maturity. Understanding these processes is fundamental to plant science because roots anchor plants, absorb water and nutrients, and interact with soil microbiomes—all of which directly influence plant health and productivity. Research into root development informs efforts to engineer crops with deeper or more efficient root architectures, improving drought tolerance and nutrient uptake in agricultural systems.
PubMed · 2026-04-01
A review reveals that the plant hormone gibberellin plays a surprisingly complex, context-dependent role in how plant roots form partnerships with beneficial soil fungi and bacteria — not just in making plants taller.
Gibberellin suppresses early symbiotic signaling by breaking down DELLA proteins, which are required to initiate partnerships with both mycorrhizal fungi and nitrogen-fixing bacteria.
Despite inhibiting early infection, gibberellin positively regulates the later formation and function of root nodules — demonstrating a stage-dependent, dual role within the same biological process.
DELLA proteins act as a central hub in the 'common symbiotic signaling pathway,' meaning a single molecular switch influences a plant's ability to form both fungal and bacterial partnerships simultaneously.