{"type": "FeatureCollection", "features": [{"id": "10.5061/dryad.brv15dv7m", "type": "Feature", "geometry": null, "properties": {"license": "unspecified", "updated": "2026-09-21T16:19:47Z", "type": "Dataset", "title": "Dark septate endophytes and arbuscular mycorrhizal fungi (Paris-morphotype) affect the stable isotope composition of 'classically' non-mycorrhizal plants", "description": "The vast majority of terrestrial plants exchange nutrients with fungal  partners forming different mycorrhizal types. The minority of plants  considered as non-mycorrhizal, however, are not necessarily free of any  fungi, but are frequently colonized by elusive fungal endophytes, such as  dark septate endophytes (DSE) or fine root endophytes (FRE). While a  functional role of FRE in improvement of nutrient gain was recently  elucidated, the function of DSE is still in discussion and was here  addressed for 36 plant species belonging to the families Equisetaceae,  Cypereaceae and Caryophyllaceae. Molecular and microscopic staining  approaches were conducted to verify the presence of DSE in the  investigated species. Stable isotope natural abundances of the elements  carbon, nitrogen, hydrogen and oxygen and total nitrogen concentrations  were analyzed for the respective species of the target plant families and  accompanying mycorrhizal and non-mycorrhizal (Brassicaceae) plant species.  Staining approaches confirmed the presence of DSE in all investigated  species within the families Equisetaceae, Cyperaceae and Caryophyllaceae.  A co-colonization with Paris-type arbuscular mycorrhiza (AM) was  occasionally found by staining and molecular approaches in species of the  Equisetaceae. Species of the Equisetaceae, Cyperaceae and Caryophyllaceae  were significantly 15N-enriched in comparison to accompanying plants. In  addition, a significant 13C and 2H enrichment and increased total nitrogen  concentrations were found for representatives of the Equisetaceae. The  15N-enrichment found here for representatives of Equisetaceae, Cyperaceae  and Caryophyllaceae provides evidence for a functional role of the  ubiquitous DSE fungi. DSE fungi obviously provide access to 15N-enriched  soil organic compounds probably in exchange for organic carbon compounds  from plant photosynthesis. As indicated by additional 13C- and  2H-enrichments, representatives of the Equisetaceae apparently gain  simultaneously organic carbon compounds from their AM fungi of the  Paris-morphotype. Thus, species of the Equisetaceae have to be considered  as partially, or in case of the achlorophyllous fertile Equisetum arvense,  as fully mycoheterotrophic at least in some stages of their life cycle. So  far mostly underappreciated fungi classified as DSE are suggested to  occupy an ecologically relevant role similar to mycorrhizae and the  occurrence of simultaneous functions of DSE and AM fungi in Equisetaceae  is proposed.", "keywords": ["2. Zero hunger", "mycoheterotrophy", "Caryophyllaceae", "Cyperaceae", "15. Life on land", "dark septate endophytes (<i>DSE</i>)", "Mycorrhiza", "equisetaceae"], "contacts": [{"organization": "Giesemann, Philipp, Eichenberg, David, St\u00f6ckel, Marcus, Seifert, Lukas, Gomes, Sofia, Merckx, Vincent, Gebauer, Gerhard,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.brv15dv7m"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.brv15dv7m", "name": "item", "description": "10.5061/dryad.brv15dv7m", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.brv15dv7m"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-08-28T00:00:00Z"}}, {"id": "10.5061/dryad.h1123/1", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:19:49Z", "type": "Dataset", "title": "Stable isotope abundance and nitrogen concentration data of adult orchids, orchid seedlings and autotrophic references.", "description": "Single and mean \u03b415N, \u03b413C, \u03b42H values, enrichment factors \u03b515N, \u03b513C, \u03b52H and total nitrogen concentration data of adult green leaves of 7 Orchidaceae species, fully mycoheterotrophic protocorms of 5 Orchidaceae species and 15 autotrophic reference plant species (n = 105).", "keywords": ["NE Bavaria", "Epipactis palustris", "Orchis militaris", "carbon (C)", "orchid seedlings", "hydrogen (H)", "stable isotopes", "orchid mycorrhiza", "Dactylorhiza majalis", "Ophrys insectifera", "mycoheterotrophy", "Platanthera bifolia", "Gymnadenia conopsea", "Neottia ovata", "Germany", "rhizoctonia", "fungi"], "contacts": [{"organization": "Schweiger, Julienne Marie-Isabelle, Bidartondo, Martin I., Gebauer, Gerhard,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.h1123/1"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.h1123/1", "name": "item", "description": "10.5061/dryad.h1123/1", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.h1123/1"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-01-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=mycoheterotrophy&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=mycoheterotrophy&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=mycoheterotrophy&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=mycoheterotrophy&offset=2", "hreflang": "en-US"}], "numberMatched": 2, "numberReturned": 2, "distributedFeatures": [], "timeStamp": "2026-09-21T18:59:00.012628Z"}