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They are involved in shoot branching inhibition, root system remodeling, mycorrhizal symbiosis, and diverse stress responses in plants. This paper systematically reviews the biosynthesis and metabolism of SLs, the perception and signaling mechanisms, their translocation and long\u2010distance transport in planta, as well as how SLs modulate key traits of forest trees via crosstalk with other hormones, including auxin, cytokinin, abscisic acid, etc. Based on current technical platforms such as tissue resolved liquid chromatography tandem mass spectrometry (LC\u2013MS\/MS), isotope labeling, tissue specific clustered regularly interspaced short palindromic repeats (CRISPR) and inducible expression systems, grafting assays, and semifield long\u2010term monitoring, this study proposes a research and breeding roadmap progressing from molecular validation to medium\u2010 and short\u2010term characterization in model trees and finally to multisite long\u2010term ecological assessment. It also provides recommendations covering risks, benefits, and regulations concerning the use of chemical analogs, gene editing, and grafting strategies in forest cultivation. This review presents a multiscale theoretical framework and testable pathways for translating SLs research from model plants to forestry applications.<\/jats:p>","DOI":"10.1111\/ppl.71064","type":"journal-article","created":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T10:29:45Z","timestamp":1787653785000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Strigolactones: From Fundamental Biology to Applications in Tree Breeding"],"prefix":"10.1111","volume":"178","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-4581-1697","authenticated-orcid":false,"given":"Zhongzheng","family":"Ma","sequence":"first","affiliation":[{"name":"State Key Laboratory of Tree Genetics and Breeding Northeast Forestry University  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-7277-7713","authenticated-orcid":false,"given":"Wanxin","family":"Li","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Tree Genetics and Breeding Northeast Forestry University  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qi","family":"Guo","sequence":"additional","affiliation":[{"name":"Institute of Forestry Science of Heilongjiang Province  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-1940-3250","authenticated-orcid":false,"given":"Dativa Gosbert","family":"Tibesigwa","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Tree Genetics and Breeding Northeast Forestry University  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qingfeng","family":"Meng","sequence":"additional","affiliation":[{"name":"Institute of Forestry Science of Heilongjiang Province  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-6909-4408","authenticated-orcid":false,"given":"Fude","family":"Wang","sequence":"additional","affiliation":[{"name":"Institute of Forestry Science of Heilongjiang Province  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,8,25]]},"reference":[{"key":"e_1_2_14_2_1","doi-asserted-by":"publisher","DOI":"10.1146\/annurev-arplant-043014-114759"},{"key":"e_1_2_14_3_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1218094"},{"key":"e_1_2_14_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/nph.16489"},{"issue":"7","key":"e_1_2_14_5_1","first-page":"1685","article-title":"Apple F\u2010Box Protein MdMAX2 Regulates Plant Photomorphogenesis and Stress Response","volume":"17","author":"An J. 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