{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,30]],"date-time":"2026-08-30T05:16:17Z","timestamp":1788066977896,"version":"build-2784847793"},"reference-count":63,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2026,8,28]],"date-time":"2026-08-28T00:00:00Z","timestamp":1787875200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Innovation Team Project of Sichuan Forestry and Grassland Administration","award":["CXTD2026002"],"award-info":[{"award-number":["CXTD2026002"]}]},{"DOI":"10.13039\/501100012166","name":"National Key R & D Program of China","doi-asserted-by":"crossref","award":["2024YFD2200103"],"award-info":[{"award-number":["2024YFD2200103"]}],"id":[{"id":"10.13039\/501100012166","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Genes"],"abstract":"<jats:p>Chalcone synthase (CHS) is a key enzyme in flavonoid biosynthesis, and its activity strongly influences the efficiency of flavonoid production in plants. By controlling the biosynthesis of secondary metabolites, CHS contributes to plant adaptation to diverse environmental stresses. Here, we identified CHS members across the Phoebe zhennan genome and systematically examined their gene structures, phylogenetic relationships, and potential roles in golden-thread wood color formation and drought response. Genome-wide screening resolved 11 putatively functional PzCHSs, which were unevenly distributed across six chromosomes. Physicochemical analyses indicated that most PzCHS proteins were hydrophilic. Phylogenetic reconstruction divided the PzCHS family into three groups, whose members generally shared similar gene structures. One tandem duplication event and five segmental duplication events were detected. Synteny analysis revealed extensive collinearity between the CHS families of P. zhennan, Phoebe bournei and Cinnamomum camphora, consistent with their close evolutionary relationships. Promoter regions of PzCHS genes were enriched for phytohormone-responsive and growth-related cis-elements, suggesting roles in development and hormonal regulation. Transcriptome profiling showed that PzCHS6 was upregulated in the transition zone of wood and under drought stress, suggesting that this gene may be associated with both golden-thread wood color formation and drought response. These results provide a framework for functional dissection of the CHS members and offer candidate genes for golden-thread wood color improvement and drought response breeding.<\/jats:p>","DOI":"10.3390\/genes17091027","type":"journal-article","created":{"date-parts":[[2026,8,28]],"date-time":"2026-08-28T18:33:52Z","timestamp":1787942032000},"page":"1027","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Genome-Wide Identification of the Chalcone Synthase Gene Family in Phoebe zhennan and Its Association with Golden-Thread Wood Color Formation and Drought Response"],"prefix":"10.3390","volume":"17","author":[{"given":"Kui","family":"Yan","sequence":"first","affiliation":[{"name":"Ecological Conservation, Restoration and Resource Utilization in Forest and Wetland Key Laboratory of Sichuan Province, Sichuan Academy of Forestry, Chengdu 610081, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"}]},{"given":"Shuai","family":"He","sequence":"additional","affiliation":[{"name":"Ecological Conservation, Restoration and Resource Utilization in Forest and Wetland Key Laboratory of Sichuan Province, Sichuan Academy of Forestry, Chengdu 610081, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"}]},{"given":"Jian","family":"Peng","sequence":"additional","affiliation":[{"name":"Ecological Conservation, Restoration and Resource Utilization in Forest and Wetland Key Laboratory of Sichuan Province, Sichuan Academy of Forestry, Chengdu 610081, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"}]},{"given":"Jianghong","family":"Qian","sequence":"additional","affiliation":[{"name":"Ecology and Conservation in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province, Sichuan Mt. Emei Forest Ecosystem National Observation and Research Station, College of Forestry, Sichuan Agricultural University, Chengdu 611130, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"data-curation","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"}]},{"given":"Yunjie","family":"Gu","sequence":"additional","affiliation":[{"name":"Ecological Conservation, Restoration and Resource Utilization in Forest and Wetland Key Laboratory of Sichuan Province, Sichuan Academy of Forestry, Chengdu 610081, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"funding-acquisition","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"}]},{"given":"Hongying","family":"Guo","sequence":"additional","affiliation":[{"name":"Ecological Conservation, Restoration and Resource Utilization in Forest and Wetland Key Laboratory of Sichuan Province, Sichuan Academy of Forestry, Chengdu 610081, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"validation","vocabulary":"credit"},{"role":"resources","vocabulary":"credit"}]},{"given":"Suyuan","family":"Zhang","sequence":"additional","affiliation":[{"name":"Ecology and Conservation in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province, Sichuan Mt. Emei Forest Ecosystem National Observation and Research Station, College of Forestry, Sichuan Agricultural University, Chengdu 611130, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"}]},{"given":"Yulin","family":"Wei","sequence":"additional","affiliation":[{"name":"Ecology and Conservation in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province, Sichuan Mt. Emei Forest Ecosystem National Observation and Research Station, College of Forestry, Sichuan Agricultural University, Chengdu 611130, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"validation","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"}]},{"given":"Ruiqi","family":"Wang","sequence":"additional","affiliation":[{"name":"Ecology and Conservation in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province, Sichuan Mt. Emei Forest Ecosystem National Observation and Research Station, College of Forestry, Sichuan Agricultural University, Chengdu 611130, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"}]},{"given":"Yu","family":"Zhou","sequence":"additional","affiliation":[{"name":"Ecology and Conservation in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province, Sichuan Mt. Emei Forest Ecosystem National Observation and Research Station, College of Forestry, Sichuan Agricultural University, Chengdu 611130, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0497-7578","authenticated-orcid":false,"given":"Hanbo","family":"Yang","sequence":"additional","affiliation":[{"name":"Ecology and Conservation in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province, Sichuan Mt. Emei Forest Ecosystem National Observation and Research Station, College of Forestry, Sichuan Agricultural University, Chengdu 611130, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"funding-acquisition","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Wang, Z., Yu, Q., Shen, W., El Mohtar, C.A., Zhao, X., and Gmitter, F.G. (2018). Functional study of CHS gene family members in citrus revealed a novel CHS gene affecting the production of flavonoids. 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