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Higher exudation rates were associated with lower biomass production. Total carboxylate exudation rates mostly decreased under P-limiting conditions.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Abstract<\/jats:title>\n                <jats:p>Within the rhizosphere, root exudates are believed to play an important role in plant phosphorus (P) acquisition. This could be particularly beneficial in upland rice production where P is often limited. However, knowledge gaps remain on how P deficiency shapes quality and quantity of root exudation in upland rice genotypes. We therefore investigated growth, plant P uptake, and root exudation patterns of two rice genotypes differing in P efficiency in semi-hydroponics at two P levels (low P\u2009=\u20091\u00a0\u00b5M, adequate P\u2009=\u2009100\u00a0\u00b5M). Root exudates were collected hydroponically 28 and 40\u00a0days after germination to analyze total carbon (C), carbohydrates, amino acids, phenolic compounds spectrophotometrically and carboxylates using a targeted LC\u2013MS approach. Despite their reported role in P solubilization, we observed that carboxylate exudation rates per unit root surface area were not increased under P deficiency. In contrast, exudation rates of total C, carbohydrates, amino acids and phenolics were mostly enhanced in response to low P supply. Overall, higher exudation rates were associated with lower biomass production in the P-inefficient genotype Nerica4, whereas the larger root system with lower C investment (per unit root surface area) in root exudates of the P-efficient DJ123 allowed for better plant growth under P deficiency. Our results reveal new insights into genotype-specific resource allocation in rice under P-limiting conditions that warrant follow-up research including more genotypes.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00425-024-04556-2","type":"journal-article","created":{"date-parts":[[2024,10,23]],"date-time":"2024-10-23T15:02:19Z","timestamp":1729695739000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Root exudation patterns of contrasting rice (Oryza sativa L.) lines in response to P limitation"],"prefix":"10.1007","volume":"260","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-8106-9477","authenticated-orcid":false,"given":"Henning","family":"Schwalm","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0606-9407","authenticated-orcid":false,"given":"Christiana","family":"Staudinger","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9537-0121","authenticated-orcid":false,"given":"Mohammad-Reza","family":"Hajirezaei","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eva","family":"Mundschenk","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alireza","family":"Golestanifard","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1825-2308","authenticated-orcid":false,"given":"Maire","family":"Holz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3505-9398","authenticated-orcid":false,"given":"Matthias","family":"Wissuwa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3213-2588","authenticated-orcid":false,"given":"Eva","family":"Oburger","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,10,23]]},"reference":[{"key":"4556_CR1","doi-asserted-by":"publisher","first-page":"875","DOI":"10.1038\/NPROT.2007.102","volume":"2","author":"EA Ainsworth","year":"2007","unstructured":"Ainsworth EA, Gillespie KM (2007) Estimation of total phenolic content and other oxidation substrates in plant tissues using Folin-Ciocalteu reagent. 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