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results)</h2></header><section class="c-scholworks"><div class="c-scholworks__main-column"><ul class="c-scholworks__tag-list"><li class="c-scholworks__tag-article">Article</li><li class="c-scholworks__tag-peer">Peer Reviewed</li></ul><div><h3 class="c-scholworks__heading"><a href="/uc/item/56k7r0x5"><div class="c-clientmarkup">Arbuscular mycorrhiza convey significant plant carbon to a diverse hyphosphere microbial food web and mineral‐associated organic matter</div></a></h3></div><div class="c-authorlist"><ul class="c-authorlist__list"><li class="c-authorlist__begin"><a href="/search/?q=author%3AKakouridis%2C%20Anne">Kakouridis, Anne</a>; </li><li><a href="/search/?q=author%3AYuan%2C%20Mengting">Yuan, Mengting</a>; </li><li><a href="/search/?q=author%3ANuccio%2C%20Erin%20E">Nuccio, Erin E</a>; </li><li><a href="/search/?q=author%3AHagen%2C%20John%20A">Hagen, John A</a>; </li><li><a href="/search/?q=author%3AFossum%2C%20Christina%20A">Fossum, Christina A</a>; </li><li><a href="/search/?q=author%3AMoore%2C%20Madeline%20L">Moore, Madeline L</a>; </li><li><a href="/search/?q=author%3AEstera%E2%80%90Molina%2C%20Katerina%20Y">Estera‐Molina, Katerina Y</a>; </li><li><a href="/search/?q=author%3ANico%2C%20Peter%20S">Nico, Peter S</a>; </li><li><a href="/search/?q=author%3AWeber%2C%20Peter%20K">Weber, Peter K</a>; </li><li><a href="/search/?q=author%3APett%E2%80%90Ridge%2C%20Jennifer">Pett‐Ridge, Jennifer</a>; </li><li class="c-authorlist__end"><a href="/search/?q=author%3AFirestone%2C%20Mary%20K">Firestone, Mary K</a> </li></ul></div><div class="c-scholworks__publication"><a href="/uc/ucb_postprints">UC Berkeley Previously Published Works</a> (2024)</div><div class="c-scholworks__abstract"><div class="c-clientmarkup">Arbuscular mycorrhizal fungi (AMF) transport substantial plant carbon (C) that serves as a substrate for soil organisms, a precursor of soil organic matter (SOM), and a driver of soil microbial dynamics. Using two-chamber microcosms where an air gap isolated AMF from roots, we <sup>13</sup>CO<sub>2</sub>-labeled Avena barbata for 6 wk and measured the C Rhizophagus intraradices transferred to SOM and hyphosphere microorganisms. NanoSIMS imaging revealed hyphae and roots had similar <sup>13</sup>C enrichment. SOM density fractionation, <sup>13</sup>C NMR, and IRMS showed AMF transferred 0.77 mg C g<sup>-1</sup> of soil (increasing total C by 2% relative to non-mycorrhizal controls); 33% was found in occluded or mineral-associated pools. In the AMF hyphosphere, there was no overall change in community diversity but 36 bacterial ASVs significantly changed in relative abundance. With stable isotope probing (SIP)-enabled shotgun sequencing, we found taxa from the Solibacterales, Sphingobacteriales, Myxococcales, and Nitrososphaerales (ammonium oxidizing archaea) were highly enriched in AMF-imported <sup>13</sup>C (> 20 atom%). Mapping sequences from <sup>13</sup>C-SIP metagenomes to total ASVs showed at least 92 bacteria and archaea were significantly <sup>13</sup>C-enriched. Our results illustrate the quantitative and ecological impact of hyphal C transport on the formation of potentially protective SOM pools and microbial roles in the AMF hyphosphere soil food web.</div></div><div class="c-scholworks__media"><ul class="c-medialist"></ul></div></div><div class="c-scholworks__ancillary"><a class="c-scholworks__thumbnail" href="/uc/item/56k7r0x5"><img src="/cms-assets/cb0a1d76655586e4fc6e6c32792122d869e03cabb9e0765820bdff95b81a767f" alt="Cover page: Arbuscular mycorrhiza convey significant plant carbon to a diverse hyphosphere microbial food web and mineral‐associated organic matter"/></a><a href="https://creativecommons.org/licenses/by/4.0/" class="c-scholworks__license"><img class="c-lazyimage" data-src="/images/cc-by-small.svg" alt="Creative Commons 'BY' version 4.0 license"/></a></div></section></section></main></form></div><div><div class="c-toplink"><a href="javascript:window.scrollTo(0, 0)">Top</a></div><footer class="c-footer"><nav class="c-footer__nav"><ul><li><a href="/">Home</a></li><li><a href="/aboutEschol">About eScholarship</a></li><li><a href="/campuses">Campus Sites</a></li><li><a href="/ucoapolicies">UC Open Access Policy</a></li><li><a href="/publishing">eScholarship Publishing</a></li><li><a href="https://www.cdlib.org/about/accessibility.html">Accessibility</a></li><li><a href="/privacypolicy">Privacy Statement</a></li><li><a href="/policies">Site Policies</a></li><li><a href="/terms">Terms of Use</a></li><li><a href="/login"><strong>Admin Login</strong></a></li><li><a href="https://help.escholarship.org"><strong>Help</strong></a></li></ul></nav><div class="c-footer__logo"><a href="/"><img class="c-lazyimage" data-src="/images/logo_footer-eschol.svg" alt="eScholarship, University of California"/></a></div><div class="c-footer__copyright">Powered by the<br/><a href="http://www.cdlib.org">California Digital Library</a><br/>Copyright © 2017<br/>The Regents of the University of California</div></footer></div></div></div></div> <script src="/js/vendors~app-bundle-2aefc956e545366a5d4e.js"></script> <script src="/js/app-bundle-4477d7630fb8c6f70662.js"></script> </body> </html>