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                  <gco:CharacterString>Wild-collected plants were collected from field sites within the UK and grown in pots with in-growth mesh-covered cores (described in Hoysted et al., 2019; 2021) in atmospheric [CO2] of 440 ppm and 800 ppm. Isotope tracers were supplied to fungi as 33P-orthophosphate and 15N-ammonium chloride and measured in plant materials. 14C was supplied to plants as 14CO2 gas which plants were allowed to fix over an entire photoperiod and the fate of labelled photosynthates traced into fungi within the soil. Methods are described in full in: Hoysted, G.A., Jacob, A.S., Kowal, J., Giesemann, P., Bidartondo, M.I., Duckett, J.G., Gebauer, G., Rimington, W.R., Schornack, S., Pressel, S. and Field, K.J., 2019. Mucoromycotina fine root endophyte fungi form nutritional mutualisms with vascular plants. Plant Physiology, 181(2), pp.565-577. Hoysted, G.A., Kowal, J., Pressel, S., Duckett, J.G., Bidartondo, M.I. and Field, K.J., 2021. Carbon for nutrient exchange between Lycopodiella inundata and Mucoromycotina fine root endophytes is unresponsive to high atmospheric CO 2. Mycorrhiza, 31, pp.431-440.</gco:CharacterString>
               </gmd:statement>
            </gmd:LI_Lineage>
         </gmd:lineage>
      </gmd:DQ_DataQuality>
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</gmd:MD_Metadata>