{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T15:05:56Z","timestamp":1789398356329,"version":"build-2803163510"},"reference-count":52,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T00:00:00Z","timestamp":1789344000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T00:00:00Z","timestamp":1789344000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Plant Biol J"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    <jats:list list-type=\"bullet\">\n                      <jats:list-item>\n                        <jats:p>\n                          Increasing temperatures impair photosynthetic apparatus by damaging photosystem II (PSII) efficiency. We evaluated the relevance of two thermal indices (Tcrit and T50) as indicators of the PSII resistance to thermal stress of\n                          <jats:italic>Quercus ilex<\/jats:italic>\n                          ,\n                          <jats:italic>Acer campestre<\/jats:italic>\n                          and\n                          <jats:italic>Fraxinus ornus<\/jats:italic>\n                          in the urban area of Rome.\n                        <\/jats:p>\n                      <\/jats:list-item>\n                      <jats:list-item>\n                        <jats:p>Tcrit (critical temperature) and T50, that is the temperature at which the maximum PSII efficiency (Fv\/Fm) decreased by 15% and 50%, were estimated by modelling Fv\/Fm response curves of leaves exposed to the temperature range of 25\u201360\u2009\u00b0C. To evaluate the functional relevance, Tcrit and T50 data were integrated with leaf functional traits using a multivariate analysis approach.<\/jats:p>\n                      <\/jats:list-item>\n                      <jats:list-item>\n                        <jats:p>\n                          <jats:italic>Q. ilex<\/jats:italic>\n                          exhibited a lower Tcrit than\n                          <jats:italic>A. campestre<\/jats:italic>\n                          and\n                          <jats:italic>F. ornus<\/jats:italic>\n                          . T50 was similar between species. In\n                          <jats:italic>Q. ilex<\/jats:italic>\n                          , early Fv\/Fm decline was consistent with an early photoprotective downregulation rather than reduced heat resistance, with PSII activity persisting even at extreme temperatures.\n                          <jats:italic>A. campestre<\/jats:italic>\n                          and\n                          <jats:italic>F. ornus<\/jats:italic>\n                          maintained high Fv\/Fm up to Tcrit rapidly collapsing beyond this threshold. The contribution of physiological and morphological traits to thermal resistance was both metric\u2010dependent and species\u2010specific. Morphological and physiological traits were primarily tied to Tcrit and T50, respectively. In\n                          <jats:italic>Q. ilex<\/jats:italic>\n                          , morphological traits explained a greater variance in both thermal indices, while physiological traits dominated in\n                          <jats:italic>A. campestre<\/jats:italic>\n                          , and a shared physiological\u2013morphological contribution prevailed in\n                          <jats:italic>F. ornus.<\/jats:italic>\n                        <\/jats:p>\n                      <\/jats:list-item>\n                      <jats:list-item>\n                        <jats:p>Thermal resistance arose from the coordinated interplay between structure and function, reflecting distinct species\u2010specific ecological strategies.<\/jats:p>\n                      <\/jats:list-item>\n                    <\/jats:list>\n                  <\/jats:p>","DOI":"10.1111\/plb.70289","type":"journal-article","created":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T14:25:53Z","timestamp":1789395953000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Divergent structure\u2013function coordination shapes leaf thermal tolerance in Mediterranean tree species"],"prefix":"10.1111","author":[{"given":"L.","family":"Friulla","sequence":"first","affiliation":[{"name":"Department of Environmental Biology Sapienza University of Rome  Rome Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5219-8731","authenticated-orcid":false,"given":"L. 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