{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,26]],"date-time":"2026-06-26T08:49:56Z","timestamp":1782463796208,"version":"3.54.5"},"reference-count":40,"publisher":"PeerJ","license":[{"start":{"date-parts":[[2026,6,26]],"date-time":"2026-06-26T00:00:00Z","timestamp":1782432000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Major Science and Technology Projects in Fujian Province","award":["2022NZ033021"],"award-info":[{"award-number":["2022NZ033021"]}]},{"name":"Fuzhou-Xiamen-Quanzhou National Independent Innovation Demonstration Zone Collaborative Innovation Platform Project","award":["2024-P-005"],"award-info":[{"award-number":["2024-P-005"]}]},{"name":"Science and Technology Project of Fuzhou City","award":["2024-SG-013"],"award-info":[{"award-number":["2024-SG-013"]}]},{"DOI":"10.13039\/501100009696","name":"Minjiang University","doi-asserted-by":"crossref","award":["MJY22037, MFK24039"],"award-info":[{"award-number":["MJY22037, MFK24039"]}],"id":[{"id":"10.13039\/501100009696","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>\n                    With the ongoing global climate change, high temperatures severely compromise the cultivation of large seaweeds.\n                    <jats:italic>Saccharina japonica<\/jats:italic>\n                    , one of the most economically important alga species, is a cold-temperate seaweed particularly sensitive to heat stress. However, the regulatory mechanisms underlying the response of\n                    <jats:italic>S. japonica<\/jats:italic>\n                    to heat stress remain unclear. Heat shock proteins (HSPs) play a crucial role in protecting plants against various abiotic stresses. Although individual members of the HSP70 family have been analyzed in previous studies, a comprehensive analysis of the\n                    <jats:italic>HSP70<\/jats:italic>\n                    gene family in\n                    <jats:italic>S. japonica<\/jats:italic>\n                    has not yet been conducted. In this study, we identified fourteen putative\n                    <jats:italic>HSP70<\/jats:italic>\n                    genes in\n                    <jats:italic>S. japonica<\/jats:italic>\n                    , of which four belong to the HSP110 subfamily and ten to the DnaK subfamily. Furthermore, we characterized the expression patterns of the\n                    <jats:italic>SjHSP70<\/jats:italic>\n                    genes. Among them, ten\n                    <jats:italic>HSP70s<\/jats:italic>\n                    were up-regulated under heat stress. Subcellular localization analysis further revealed that SjHSP70-03, SjHSP70-06, and SjHSP70-13 were mainly localized in the nucleus\/cytoplasm, whereas SjHSP70-11 was also detected in the nucleus and cytoplasm but predominantly in an undetermined compartment. These findings provide valuable insights that will facilitate future studies on the function of HSP70s in\n                    <jats:italic>S. japonica.<\/jats:italic>\n                  <\/jats:p>","DOI":"10.7717\/peerj.21451","type":"journal-article","created":{"date-parts":[[2026,6,26]],"date-time":"2026-06-26T08:32:32Z","timestamp":1782462752000},"page":"e21451","source":"Crossref","is-referenced-by-count":0,"title":["Genome-wide analysis of\n                    <i>HSP70<\/i>\n                    gene superfamily in kelp (\n                    <i>Saccharina japonica<\/i>\n                    ): identification, characterization, and heat stress-responsive expression profiles"],"prefix":"10.7717","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1091-0991","authenticated-orcid":true,"given":"Zhongyuan","family":"Lin","sequence":"first","affiliation":[{"name":"Fujian Provincial Universities Engineering Research Center of Marine Biology and Drugs, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Marine Biotechnology Center, Fuzhou Institute of Oceanography, Fuzhou, China"},{"name":"Fuzhou Technological Innovation Center of Seawater Planting Industry, Minjiang University, Fuzhou, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wentai","family":"Mao","sequence":"additional","affiliation":[{"name":"Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Marine Biotechnology Center, Fuzhou Institute of Oceanography, Fuzhou, China"},{"name":"College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yijuan","family":"Han","sequence":"additional","affiliation":[{"name":"Fujian Provincial Universities Engineering Research Center of Marine Biology and Drugs, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Marine Biotechnology Center, Fuzhou Institute of Oceanography, Fuzhou, China"},{"name":"Fuzhou Technological Innovation Center of Seawater Planting Industry, Minjiang University, Fuzhou, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huibin","family":"Xu","sequence":"additional","affiliation":[{"name":"Fujian Provincial Universities Engineering Research Center of Marine Biology and Drugs, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Fujian 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Oceanography, Minjiang University, Fuzhou, China"},{"name":"Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Marine Biotechnology Center, Fuzhou Institute of Oceanography, Fuzhou, China"},{"name":"Fuzhou Technological Innovation Center of Seawater Planting Industry, Minjiang University, Fuzhou, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongmei","family":"Lin","sequence":"additional","affiliation":[{"name":"Fujian Provincial Universities Engineering Research Center of Marine Biology and Drugs, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Marine Biotechnology Center, Fuzhou Institute of Oceanography, Fuzhou, China"},{"name":"Fuzhou Technological Innovation Center of Seawater Planting Industry, Minjiang University, Fuzhou, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yongji","family":"Huang","sequence":"additional","affiliation":[{"name":"Fujian Provincial Universities Engineering Research Center of Marine Biology and Drugs, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Marine Biotechnology Center, Fuzhou Institute of Oceanography, Fuzhou, China"},{"name":"Fuzhou Technological Innovation Center of Seawater Planting Industry, Minjiang University, Fuzhou, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenshan","family":"Wang","sequence":"additional","affiliation":[{"name":"Fujian Provincial Universities Engineering Research Center of Marine Biology and Drugs, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, College of Geography and Oceanography, Minjiang University, Fuzhou, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenwei","family":"Lin","sequence":"additional","affiliation":[{"name":"College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianjun","family":"Lu","sequence":"additional","affiliation":[{"name":"Fujian Provincial Universities Engineering Research Center of Marine Biology and Drugs, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, College of Geography and Oceanography, Minjiang University, Fuzhou, China"},{"name":"Marine Biotechnology 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