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Information on how plants sense and adapt to Pi is required to enhance phosphorus\u2010use efficiency (PUE) and thereby promote agricultural sustainability.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>Here, we show that strigolactones (SLs) regulate rice\u00a0root developmental and metabolic adaptations to low Pi, by promoting efficient Pi uptake and translocation from roots to shoots.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>Low Pi stress triggers the synthesis of SLs, which dissociate the Pi central signalling module of SPX domain\u2010containing protein (SPX4) and PHOSPHATE STARVATION RESPONSE protein (PHR2), leading to the release of PHR2 into the nucleus and activating the expression of Pi\u2010starvation\u2010induced genes including Pi transporters. The SL synthetic analogue GR24 enhances the interaction between the SL receptor DWARF 14 (D14) and a RING\u2010finger ubiquitin E3 ligase (SDEL1). The <jats:italic>sdel<\/jats:italic> mutants have a reduced response to Pi starvation relative to wild\u2010type plants, leading to insensitive root adaptation to Pi. Also, SLs induce the degradation of SPX4 via forming the D14\u2010SDEL1\u2010SPX4 complex.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>Our findings reveal a novel mechanism underlying crosstalk between the SL and Pi signalling networks in response to Pi fluctuations, which will enable breeding of high\u2010PUE crop plants.<\/jats:p><\/jats:list-item>\n<\/jats:list><\/jats:p>","DOI":"10.1111\/nph.18963","type":"journal-article","created":{"date-parts":[[2023,5,17]],"date-time":"2023-05-17T07:50:25Z","timestamp":1684309825000},"page":"673-686","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":41,"title":["The <scp>D14\u2010SDEL1\u2010SPX4<\/scp> cascade integrates the strigolactone and phosphate signalling networks in rice"],"prefix":"10.1111","volume":"239","author":[{"given":"Pengyuan","family":"Gu","sequence":"first","affiliation":[{"name":"State Key Laboratory of Crop Genetics &amp; Germplasm Enhancement and 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Henan Agricultural University  450002 Zhengzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ripeng","family":"Hu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Crop Genetics &amp; Germplasm Enhancement and Utilization Nanjing Agricultural University  210095 Nanjing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daojian","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Crop Genetics &amp; Germplasm Enhancement and Utilization Nanjing Agricultural University  210095 Nanjing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guoxinan","family":"Zong","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Crop Genetics &amp; Germplasm Enhancement and Utilization Nanjing Agricultural University  210095 Nanjing 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