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In addition to this, warming-induced active-layer deepening and increased rooting depth may result in further carbon losses from previously-frozen soil by stimulating microbial communities through fresh carbon inputs inducing positive rhizosphere priming. While models based on temperate data predict significant permafrost carbon loss through rhizosphere priming, data from permafrost soils are lacking. Here, we provide direct evidence of live plant-induced positive rhizosphere priming in permafrost and active-layer soils across diverse soil types from Arctic and Subarctic Canada. By <jats:sup>13<\/jats:sup>CO<jats:sub>2<\/jats:sub> labelling plants in a controlled environment, we show that root activity increases carbon loss from previously frozen soils by 31%. This rhizosphere priming effect persists longer in permafrost than in active-layer soils, suggesting greater vulnerability of permafrost carbon. These findings underscore the urgency of incorporating plant\u2013soil\u2013microbe interactions into models predicting greenhouse gas emissions from thawing permafrost.<\/jats:p>","DOI":"10.1038\/s41467-025-58845-9","type":"journal-article","created":{"date-parts":[[2025,4,15]],"date-time":"2025-04-15T12:49:12Z","timestamp":1744721352000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Positive rhizosphere priming accelerates carbon release from permafrost soils"],"prefix":"10.1038","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5536-6312","authenticated-orcid":false,"given":"Nina L.","family":"Friggens","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8096-1594","authenticated-orcid":false,"given":"Gustaf","family":"Hugelius","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steven V.","family":"Kokelj","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9469-5856","authenticated-orcid":false,"given":"Julian B.","family":"Murton","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0911-8107","authenticated-orcid":false,"given":"Gareth K.","family":"Phoenix","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9183-6617","authenticated-orcid":false,"given":"Iain P.","family":"Hartley","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,4,15]]},"reference":[{"key":"58845_CR1","doi-asserted-by":"publisher","first-page":"6573","DOI":"10.5194\/bg-11-6573-2014","volume":"11","author":"G Hugelius","year":"2014","unstructured":"Hugelius, G. et al. 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Fieldwork was carried out in collaboration with local researchers, ensuring appropriate permissions and engagement with relevant stakeholders. We acknowledge and appreciate the support of the Tr\u2019ond\u00ebk Hw\u00ebch\u2019in First Nation, the Inuvik Hunters and Trappers Committee, the Aklavik Hunters and Trappers Committee, and the Tuktoyaktuk Hunters and Trappers Committee, who approved research activities on Inuvialuit Private Lands. The research team is committed to fostering an inclusive and diverse scientific environment. This study involved contributions from researchers at different career stages and disciplines, promoting collaboration across institutions. All authors contributed to the design, execution, and interpretation of the study, ensuring a fair and equitable distribution of responsibilities.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics"}}],"article-number":"3576"}}