{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,4]],"date-time":"2026-08-04T04:46:07Z","timestamp":1785818767620,"version":"3.56.0"},"reference-count":74,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2026,8,1]],"date-time":"2026-08-01T00:00:00Z","timestamp":1785542400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Key Research and Development Program of China","award":["2023YFD1202800"],"award-info":[{"award-number":["2023YFD1202800"]}]},{"name":"Collaborative Innovation Project of the Shennong Laboratory","award":["SN02-2025-01"],"award-info":[{"award-number":["SN02-2025-01"]}]},{"name":"Project of Open Bidding Program of Hainan Province","award":["HKKJ2025JBGS05"],"award-info":[{"award-number":["HKKJ2025JBGS05"]}]},{"name":"Henan Provincial Key Research and Development Program","award":["261111111100"],"award-info":[{"award-number":["261111111100"]}]},{"name":"the Earmarked Fund","award":["CARS-13"],"award-info":[{"award-number":["CARS-13"]}]},{"name":"Henan Province Agriculture Research System","award":["S2012-5"],"award-info":[{"award-number":["S2012-5"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Mol. Sci.","IJMS"],"abstract":"<jats:p>The cultivated peanut (Arachis hypogaea L.) is an important oilseed and economic crop worldwide, with seed protein content being a key target for quality improvement. The Sugars Will Eventually be Exported Transporter (SWEET) gene family encodes sugar transporters that play crucial roles in plant growth and development, stress tolerance, pathogen interactions, and seed filling. In this study, 43 AhSWEET genes were identified in the cultivated peanut genome and classified into four phylogenetic clades. Members within the same clade generally show similar exon-intron structures and conserved motif compositions, suggesting evolutionary conservation within subgroups. Promoter cis-regulatory elements analysis indicated that AhSWEET genes contain multiple elements associated with light response, hormone signaling, stress response, and growth and development, implying their potential involvement in diverse biological processes. Subcellular localization predictions indicated that most AhSWEET proteins are likely localized to the plasma membrane, consistent with their putative roles in transmembrane sugar transport. This was further supported by transient expression analysis of selected AhSWEET-eGFP fusion proteins in Nicotiana benthamiana leaves. Comparative phylogenetic and synteny analyses reveal that AhSWEET5, AhSWEET21, AhSWEET27, and AhSWEET43 are closely related to soybean GmSWEET10a and GmSWEET10b, which are known to regulate seed size and storage-compound accumulation. Transcriptome data and quantitative reverse transcriptase PCR analysis showed that these candidate genes are preferentially expressed in seed-related tissues, particularly the testa and embryo, suggesting possible sugar allocation during peanut seed development. Overall, this study provides a systematic characterization of the AhSWEET gene family and identifies several candidate genes for future functional studies aimed at improving peanut seed quality, including protein accumulation.<\/jats:p>","DOI":"10.3390\/ijms27156924","type":"journal-article","created":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T12:57:56Z","timestamp":1785761876000},"page":"6924","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Genome-Wide Identification of the SWEET Gene Family in Peanut and Prediction of Candidate AhSWEET Genes Associated with Seed Protein Accumulation"],"prefix":"10.3390","volume":"27","author":[{"given":"Lina","family":"He","sequence":"first","affiliation":[{"name":"School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China"},{"name":"Institute of Crop Molecular Breeding, Henan Academy of Agricultural Sciences\/Key Laboratory of Oil Crops in Huang-Huai-Hai Plains, Ministry of Agriculture and Rural Affairs\/Henan Provincial Key Laboratory for Oil Crops Improvement\/National and Provincial Joint Engineering Laboratory for Peanut Genetic Improvement, Zhengzhou 450002, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-8275-6896","authenticated-orcid":false,"given":"Pengyu","family":"Qu","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China"},{"name":"Institute of Crop Molecular Breeding, Henan Academy of Agricultural Sciences\/Key Laboratory of Oil Crops in Huang-Huai-Hai Plains, Ministry of Agriculture and Rural Affairs\/Henan Provincial Key Laboratory for Oil Crops Improvement\/National and Provincial Joint Engineering Laboratory for Peanut Genetic Improvement, Zhengzhou 450002, 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