{"entity": "researcher", "timestamp": "2026-07-14T04:26:14.886Z", "family": "Olofsson", "given": "Johan", "initials": "J", "orcid": "0000-0002-6943-1218", "affiliations": ["Department of Ecology and Environmental Science, Ume\u00e5 University, 90187, Ume\u00e5, Sweden."], "links": {"self": {"href": "https://publications.scilifelab.se/researcher/5e9ecce51d244e0ab066f315aae8548d.json"}, "display": {"href": "https://publications.scilifelab.se/researcher/5e9ecce51d244e0ab066f315aae8548d"}}, "publications": [{"entity": "publication", "iuid": "ce734f9ae7b5490b8f6022b18a7a3fc0", "links": {"self": {"href": "https://publications.scilifelab.se/publication/ce734f9ae7b5490b8f6022b18a7a3fc0.json"}, "display": {"href": "https://publications.scilifelab.se/publication/ce734f9ae7b5490b8f6022b18a7a3fc0"}}, "title": "In situ seasonal patterns of root auxin concentrations and meristem length in an arctic sedge.", "authors": [{"family": "Blume-Werry", "given": "Gesche", "initials": "G", "orcid": "0000-0003-0909-670X", "researcher": {"href": "https://publications.scilifelab.se/researcher/834dc85a0d9f4ab59572deab63e643a3.json"}}, {"family": "Semenchuk", "given": "Philipp", "initials": "P", "orcid": "0000-0002-1949-6427", "researcher": {"href": "https://publications.scilifelab.se/researcher/663ebd034e3f481fa7a569a83dd21e34.json"}}, {"family": "Ljung", "given": "Karin", "initials": "K", "orcid": "0000-0003-2901-189X", "researcher": {"href": "https://publications.scilifelab.se/researcher/f91b1e1f90c24559b915ebcd265804a4.json"}}, {"family": "Milbau", "given": "Ann", "initials": "A", "orcid": "0000-0003-3555-8883", "researcher": {"href": "https://publications.scilifelab.se/researcher/9389bf5441d54064bfaee999117d752c.json"}}, {"family": "Novak", "given": "Ondrej", "initials": "O", "orcid": "0000-0003-3452-0154", "researcher": {"href": "https://publications.scilifelab.se/researcher/8c19165acb9a4ff79dd96af7fccdc5f8.json"}}, {"family": "Olofsson", "given": "Johan", "initials": "J", "orcid": "0000-0002-6943-1218", "researcher": {"href": "https://publications.scilifelab.se/researcher/5e9ecce51d244e0ab066f315aae8548d.json"}}, {"family": "Brunoni", "given": "Federica", "initials": "F", "orcid": "0000-0003-1497-9419", "researcher": {"href": "https://publications.scilifelab.se/researcher/8a28132c7a0e407da31e4d79698679c6.json"}}], "type": "journal article", "published": "2024-05-00", "journal": {"title": "New Phytol.", "issn": "1469-8137", "volume": "242", "issue": "3", "pages": "988-999", "issn-l": "0028-646X"}, "abstract": "Seasonal dynamics of root growth play an important role in large-scale ecosystem processes; they are largely governed by growth regulatory compounds and influenced by environmental conditions. Yet, our knowledge about physiological drivers of root growth is mostly limited to laboratory-based studies on model plant species. We sampled root tips of Eriophorum vaginatum and analyzed their auxin concentrations and meristem lengths biweekly over a growing season in situ in a subarctic peatland, both in surface soil and at the permafrost thawfront. Auxin concentrations were almost five times higher in surface than in thawfront soils and increased over the season, especially at the thawfront. Surprisingly, meristem length showed an opposite pattern and was almost double in thawfront compared with surface soils. Meristem length increased from peak to late season in the surface soils but decreased at the thawfront. Our study of in situ seasonal dynamics in root physiological parameters illustrates the potential for physiological methods to be applied in ecological studies and emphasizes the importance of in situ measurements. The strong effect of root location and the unexpected opposite patterns of meristem length and auxin concentrations likely show that auxin actively governs root growth to ensure a high potential for nutrient uptake at the thawfront.", "doi": "10.1111/nph.19616", "pmid": "38375943", "labels": {"Swedish Metabolomics Centre": "Service"}, "xrefs": [], "notes": [], "created": "2024-11-26T10:28:02.968Z", "modified": "2025-10-17T13:03:13.205Z"}, {"entity": "publication", "iuid": "d15cf4e4b2eb403d9ed06962d64bd8a6", "links": {"self": {"href": "https://publications.scilifelab.se/publication/d15cf4e4b2eb403d9ed06962d64bd8a6.json"}, "display": {"href": "https://publications.scilifelab.se/publication/d15cf4e4b2eb403d9ed06962d64bd8a6"}}, "title": "Contrasting plant-soil-microbial feedbacks stabilize vegetation types and uncouple topsoil C and N stocks across a subarctic-alpine landscape.", "authors": [{"family": "Casta\u00f1o", "given": "Carles", "initials": "C", "orcid": "0000-0002-2403-7006", "researcher": {"href": "https://publications.scilifelab.se/researcher/b7bfa857714f425886c4484c15eb59a5.json"}}, {"family": "Hallin", "given": "Sara", "initials": "S", "orcid": "0000-0002-9069-9024", "researcher": {"href": "https://publications.scilifelab.se/researcher/6e3491aec8fe4fbf827e2448c898356e.json"}}, {"family": "Egelkraut", "given": "Dagmar", "initials": "D", "orcid": "0000-0002-2644-2144", "researcher": {"href": "https://publications.scilifelab.se/researcher/c360cf5cb53c43e582e95487d8c0a949.json"}}, {"family": "Lindahl", "given": "Bj\u00f6rn D", "initials": "BD", "orcid": "0000-0002-3384-4547", "researcher": {"href": "https://publications.scilifelab.se/researcher/b7a40688d33545a19c3c666940bda255.json"}}, {"family": "Olofsson", "given": "Johan", "initials": "J", "orcid": "0000-0002-6943-1218", "researcher": {"href": "https://publications.scilifelab.se/researcher/5e9ecce51d244e0ab066f315aae8548d.json"}}, {"family": "Clemmensen", "given": "Karina Engelbrecht", "initials": "KE", "orcid": "0000-0002-9627-6428", "researcher": {"href": "https://publications.scilifelab.se/researcher/73a4e19bdfc1431c9dd1c3f1cd58c766.json"}}], "type": "journal article", "published": "2023-06-00", "journal": {"title": "New Phytol.", "issn": "1469-8137", "volume": "238", "issue": "6", "pages": "2621-2633", "issn-l": "0028-646X"}, "abstract": "Global vegetation regimes vary in belowground carbon (C) and nitrogen (N) dynamics. However, disentangling large-scale climatic controls from the effects of intrinsic plant-soil-microbial feedbacks on belowground processes is challenging. In local gradients with similar pedo-climatic conditions, effects of plant-microbial feedbacks may be isolated from large-scale drivers. Across a subarctic-alpine mosaic of historic grazing fields and surrounding heath and birch forest, we evaluated whether vegetation-specific plant-microbial feedbacks involved contrasting N cycling characteristics and C and N stocks in the organic topsoil. We sequenced soil fungi, quantified functional genes within the inorganic N cycle, and measured 15 N natural abundance. In grassland soils, large N stocks and low C : N ratios associated with fungal saprotrophs, archaeal ammonia oxidizers, and bacteria capable of respiratory ammonification, indicating maintained inorganic N cycling a century after abandoned reindeer grazing. Toward forest and heath, increasing abundance of mycorrhizal fungi co-occurred with transition to organic N cycling. However, ectomycorrhizal fungal decomposers correlated with small soil N and C stocks in forest, while root-associated ascomycetes associated with small N but large C stocks in heath, uncoupling C and N storage across vegetation types. We propose that contrasting, positive plant-microbial feedbacks stabilize vegetation trajectories, resulting in diverging soil C : N ratios at the landscape scale.", "doi": "10.1111/nph.18679", "pmid": "36519258", "labels": {"NGI Long read": "Service", "National Genomics Infrastructure": "Service", "NGI Uppsala (Uppsala Genome Center)": "Service", "Bioinformatics Support for Computational Resources": "Service"}, "xrefs": [], "notes": [], "created": "2023-10-10T08:52:43.763Z", "modified": "2024-01-16T13:48:33.308Z"}]}