{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T00:04:07Z","timestamp":1790640247164,"version":"4.1.0"},"reference-count":96,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2025,9,1]],"date-time":"2025-09-01T00:00:00Z","timestamp":1756684800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Global Change Biology"],"published-print":{"date-parts":[[2025,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Plants play a key role in mediating soil response to global change, and breeding or engineering crops to increase soil organic carbon (SOC) storage is a potential route to land\u2010based carbon dioxide removal in agricultural systems. However, due to limited observational datasets plus shifting paradigms of SOC stabilization, it is unclear which plant traits are most important for enhancing different types of soil organic matter. Existing long\u2010term common gardens of genetically diverse plant populations may provide an opportunity to evaluate biological controls on SOC, separate from environmental or management variability. Here we report on soil and root chemical data collected for 24 genotypes within a 13\u2010year\u2010old common garden in northwestern Oregon planted with a large natural variant population of\n                    <jats:styled-content style=\"fixed-case\">\n                      <jats:italic>Populus trichocarpa<\/jats:italic>\n                    <\/jats:styled-content>\n                    . Fractionating surface soil (0\u201315\u2009cm) revealed substantial variation in stocks of mineral\u2010associated organic matter (MAOM; 18\u201367\u2009t C\/ha) and particulate organic matter (POM; 2\u201322\u2009t C\/ha). Tree genotype explained 24% and 26% of the MAOM and POM stock variability, respectively, after controlling for background variability. We found minimal association between SOC concentration and either aboveground tree productivity or root biomass recalcitrance (C\/N ratios and lignin content). In contrast, root elemental content appeared influential for MAOM\u2010C concentration, which showed a strong positive association with root aluminum (Al) and a strong negative association with root boron (B) and magnesium (Mg). Furthermore, root concentrations of these elements were highly heritable (57%\u201378%) and not simply a reflection of background variation in soil elemental concentrations. We estimate that surface SOC stocks under these 24 genotypes have diverged at rates of up to 1.2\u20134.3\u2009t\u2009C\/ha\/year. These results suggest that long\u2010term genetic diversity trials have value for elucidating biological controls on soil organic matter dynamics, and that traits associated with root elemental content may be a useful target for enhancing biosequestration.\n                  <\/jats:p>","DOI":"10.1111\/gcb.70450","type":"journal-article","created":{"date-parts":[[2025,9,1]],"date-time":"2025-09-01T12:00:03Z","timestamp":1756728003000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Which Plant Traits Increase Soil Carbon Sequestration? 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