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J. Mol. Sci.","IJMS"],"abstract":"<jats:p>Soil salinization has become a major global abiotic threat restricting sustainable viticulture, especially in coastal and inland saline\u2013alkali zones. Unlike cereal crops mainly suffering from sodium toxicity, grapevine (Vitis vinifera L.) is a typical chloride-sensitive woody perennial, subjected to superimposed damages of osmotic stress, ionic imbalance and secondary oxidative injury under saline conditions which severely suppress vegetative growth and degrade berry quality. This review systematically summarizes the multi-layered physiological adaptive mechanisms of grapevine against salt stress, including ion homeostasis maintained by salt overly sensitive (SOS), Na+\/H+ exchanger (NHX) and chloride channel (CLC) transporter families, active accumulation of osmoprotectants, synergistic enzymatic and non-enzymatic antioxidant systems, and phytohormone crosstalk networks formed by endogenous phytohormones (abscisic acid, ABA; jasmonic acid, JA; salicylic acid, SA; brassinosteroid, BR) and small signaling molecules. We further elaborate comprehensive molecular regulatory cascades governing salt tolerance, covering core functional genes for ion transport, master transcription factor families WRKY, MYB, APETALA2\/Ethylene Response Factor (AP2\/ERF), NAC, basic helix\u2013loop\u2013helix (bHLH) and emerging epigenetic regulatory layers mediated by deoxyribonucleic acid (DNA) methylation, microRNAs (miRNAs), long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs). In addition, we integrate four categories of field mitigation strategies for saline vineyards: germplasm improvement via salt-tolerant rootstock grafting, rhizosphere soil basal amendment, exogenous biostimulant regulation, and precision agronomic optimization. Current experimental systems do not fully recapitulate complex field combined-stress conditions, as most studies rely on laboratory single-salt stress simulation. Meanwhile, multi-omics, Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR) gene editing and high-throughput phenotyping tools provide promising approaches to deepen our understanding of grape salt tolerance. This review constructs a comprehensive theoretical framework linking physiological responses, molecular regulatory networks and practical field technologies, offering systematic theoretical references and technical guidance for salt-tolerant germplasm innovation and environmentally sustainable viticulture on saline soils.<\/jats:p>","DOI":"10.3390\/ijms27156692","type":"journal-article","created":{"date-parts":[[2026,7,27]],"date-time":"2026-07-27T11:54:26Z","timestamp":1785153266000},"page":"6692","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Responses, Physiological and Molecular Mechanisms, and Mitigation Strategies of Grapevine Under Salt Stress"],"prefix":"10.3390","volume":"27","author":[{"given":"Ting","family":"Zheng","sequence":"first","affiliation":[{"name":"Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongying","family":"Li","sequence":"additional","affiliation":[{"name":"Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lingzhu","family":"Wei","sequence":"additional","affiliation":[{"name":"Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiang","family":"Xiang","sequence":"additional","affiliation":[{"name":"Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianhui","family":"Cheng","sequence":"additional","affiliation":[{"name":"Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,7,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"538","DOI":"10.1016\/j.molp.2025.12.009","article-title":"Plant salt-tolerance mechanisms: Classic signaling pathways, emerging frontiers, and future perspectives","volume":"19","author":"Ma","year":"2025","journal-title":"Mol. 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