{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T09:13:54Z","timestamp":1788426834673,"version":"build-2803163510"},"reference-count":42,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2026,7,6]],"date-time":"2026-07-06T00:00:00Z","timestamp":1783296000000},"content-version":"vor","delay-in-days":5,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T00:00:00Z","timestamp":1782864000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100002850","name":"Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico","doi-asserted-by":"publisher","award":["3160274"],"award-info":[{"award-number":["3160274"]}],"id":[{"id":"10.13039\/501100002850","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002850","name":"Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico","doi-asserted-by":"publisher","award":["1140189"],"award-info":[{"award-number":["1140189"]}],"id":[{"id":"10.13039\/501100002850","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Physiologia Plantarum"],"published-print":{"date-parts":[[2026,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    The increasing frequency and intensity of extreme thermal events in Maritime Antarctica pose new challenges for terrestrial cryptogamic vegetation, in which bryophytes are major components. We analyzed acute heat\u2010shock responses in two Antarctic mosses with contrasting canopy organization and habitat associations: the dense bank\u2010forming\n                    <jats:italic>Chorisodontium aciphyllum<\/jats:italic>\n                    and the more open lawn\u2010forming\n                    <jats:styled-content style=\"fixed-case\">\n                      <jats:italic>Polytrichastrum alpinum<\/jats:italic>\n                    <\/jats:styled-content>\n                    under fully hydrated conditions. Both species showed substantial short\u2010term tissue\u2010level heat resistance when LT\n                    <jats:sub>50<\/jats:sub>\n                    was defined from electrolyte leakage (LT\n                    <jats:sub>50<\/jats:sub>\n                    \u2009&gt;\u200955\u00b0C), whereas Fv\/Fm declined over a lower and nearly identical thermal range centered near 43\u00b0C. Heat shock induced strong antioxidant enzyme responses and coordinated transcriptional changes in heat\u2010stress\u2010 and proteostasis\u2010associated genes, including HSF, HSP70 isoforms, and ubiquitin\u2010related markers. Untargeted metabolomics revealed relative metabolic reorganization in both species, including a shared LT\n                    <jats:sub>50<\/jats:sub>\n                    \u2010associated signature characterized by relative enrichment of carbohydrate\u2010 and aromatic\/phenolic\u2010associated features and relative depletion of lipid\u2010 and terpenoid\u2010related features. Species\u2010related differences were most evident as differences in response amplitude and relative LC\u2013MS feature\u2010family weighting, without evidence of divergent pathway\u2010level activation. Together, these results indicate that Antarctic mosses share core heat\u2010stress modules but orchestrate them divergently through species\u2010dependent redox regulation, membrane\u2010associated stress responses and proteostasis\u2010related regulation, with non\u2010identical enzymatic and metabolomic trajectories under severe thermal challenge.\n                  <\/jats:p>","DOI":"10.1111\/ppl.71015","type":"journal-article","created":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T01:18:28Z","timestamp":1783387108000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Divergent Heat\u2010Shock Stress Responses in\n                    <i>Chorisodontium aciphyllum<\/i>\n                    and\n                    <i>Polytrichastrum alpinum<\/i>\n                    From Maritime Antarctica"],"prefix":"10.1111","volume":"178","author":[{"given":"Carla","family":"Pino","sequence":"first","affiliation":[{"name":"Laboratorio de Fisiolog\u00eda y Biotecnolog\u00eda Vegetal, Departamento de Biolog\u00eda, Facultad de Qu\u00edmica y Biolog\u00eda Universidad de Santiago de Chile  Santiago Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gustavo E.","family":"Z\u00fa\u00f1iga","sequence":"additional","affiliation":[{"name":"Laboratorio de Fisiolog\u00eda y Biotecnolog\u00eda Vegetal, Departamento de Biolog\u00eda, Facultad de Qu\u00edmica y Biolog\u00eda Universidad de Santiago de Chile  Santiago Chile"},{"name":"Centro de Nanociencia y Nanotecnolog\u00eda (CEDENNA) Universidad de Santiago de Chile  Santiago Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rodrigo A.","family":"Contreras","sequence":"additional","affiliation":[{"name":"Laboratorio de Fisiolog\u00eda y Biotecnolog\u00eda Vegetal, Departamento de Biolog\u00eda, Facultad de Qu\u00edmica y Biolog\u00eda Universidad de Santiago de Chile  Santiago 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