phosphorus-efficiency
Phosphorus efficiency refers to a plant's ability to acquire, utilize, and redistribute phosphorus—an essential nutrient required for DNA synthesis, energy transfer via ATP, and membrane integrity—under conditions of limited soil availability. Because phosphorus is often a scarce or poorly accessible resource in many agricultural soils, understanding the molecular and physiological mechanisms that enable plants to thrive with less of it is a central challenge in plant science. Research in this area aims to identify genetic traits and root adaptations that could reduce dependence on phosphate fertilizers while sustaining crop productivity.
open_in_new WikipediaPubMed · 2026-04-13
Scientists discovered how two genetic switches in maize control the plant's ability to find and absorb phosphorus spread unevenly through soil, linking these switches to both root growth behavior and the communities of microbes living around the roots.
Mutation of ZmPHR2 severely impaired shoot development, photosynthetic efficiency, and whole-plant phosphorus distribution, while ZmPHR1 mutation mainly affected root shape and branching patterns.
Loss of either transcription factor completely abolished the ability of maize roots to preferentially grow into phosphorus-rich soil patches, a key survival strategy in patchy soils.
Both mutations disrupted the composition and network structure of bacterial and fungal communities in the root zone, linking plant genetics directly to soil microbiome assembly.
