{
    "abstract": "Abscisic acid (ABA) seed priming impacts plant growth and stress resistance, yet its precise physiological and molecular mechanisms remain elusive. This study explored the role of ABA-priming in enhancing drought acclimation in sweet sorghum (Sorghum bicolor Moench) using physiological assessments and comparative transcriptomics. Under drought stress, ABA-primed seedlings exhibited increased plant height, larger leaves, and higher leaf water content compared to non-primed plants. While drought negatively affected photosynthesis through the regulation of photosystem I and II, ABA-priming improved photosynthesis and WUE by involving in differential expression of photosystem II genes. ABA-priming promoted the accumulation of cuticular wax and cutin, effectively reducing leaf water loss. Drought triggered endogenous ABA production via ABA inactivation genes (UGT, BGLU), while ABA-priming activated auxin (IAA) biosynthesis via YUCCA, enhancing auxin-mediated responses and gibberellic acid (GA) signalling. The synergistic action of ABA and IAA culminated in enhanced drought tolerance. Additionally, ABA-priming and drought stress regulated NAC transcription factors, with SbNAC21-1 emerging as a pivotal transcriptional activator intricately linked to auxin signalling. Overexpression of SbNAC21-1 in Arabidopsis effectively enhanced drought tolerance. These findings offer valuable insights into the intricate mechanisms underpinning the beneficial effects of ABA-priming, ultimately enhancing plant adaptability to environmental stressors.",
    "authors": [
        {
            "affiliation": "College of Grassland Science, Qingdao Agricultural University, Qingdao, China.\nDepartment of Agriculture and Forestry, Hainan Tropical Ocean University, Sanya, China.",
            "firstname": "Yao",
            "initials": "Y",
            "lastname": "Luhua"
        },
        {
            "affiliation": "College of Agronomy, Qingdao Agricultural University, Qingdao, China.",
            "firstname": "Ni",
            "initials": "N",
            "lastname": "Yu"
        },
        {
            "affiliation": "College of Agronomy and Biotechnology, Southwest University, Chongqing, China.",
            "firstname": "Chen",
            "initials": "C",
            "lastname": "Chunjie"
        },
        {
            "affiliation": "College of Grassland Science, Qingdao Agricultural University, Qingdao, China.\nQingdao Key Laboratory of Specialty Plant Germplasm Innovation and Utilization in Saline Soils of Coastal Beach, Qingdao Agricultural University, Qingdao, China.",
            "firstname": "Xiong",
            "initials": "X",
            "lastname": "Wangdan"
        },
        {
            "affiliation": "College of Agronomy and Biotechnology, Southwest University, Chongqing, China.",
            "firstname": "Gan",
            "initials": "G",
            "lastname": "Qiaoqiao"
        },
        {
            "affiliation": "College of Grassland Science, Qingdao Agricultural University, Qingdao, China.\nQingdao Key Laboratory of Specialty Plant Germplasm Innovation and Utilization in Saline Soils of Coastal Beach, Qingdao Agricultural University, Qingdao, China.",
            "firstname": "Jia",
            "initials": "J",
            "lastname": "Xinfeng"
        },
        {
            "affiliation": "College of Agronomy and Biotechnology, Southwest University, Chongqing, China.",
            "firstname": "Jin",
            "initials": "J",
            "lastname": "Shurong"
        },
        {
            "affiliation": "Qingdao Key Laboratory of Specialty Plant Germplasm Innovation and Utilization in Saline Soils of Coastal Beach, Qingdao Agricultural University, Qingdao, China.",
            "firstname": "Yang",
            "initials": "Y",
            "lastname": "Jianfeng"
        },
        {
            "affiliation": "College of Grassland Science, Qingdao Agricultural University, Qingdao, China.\nQingdao Key Laboratory of Specialty Plant Germplasm Innovation and Utilization in Saline Soils of Coastal Beach, Qingdao Agricultural University, Qingdao, China.",
            "firstname": "Guo",
            "initials": "G",
            "lastname": "Yanjun"
        }
    ],
    "conclusions": null,
    "copyrights": "\u00a9 2025 John Wiley & Sons Ltd.",
    "doi": "10.1111/pce.15575",
    "journal": "Plant, cell & environment",
    "keywords": [
        "ABA\u2010IAA synergy",
        "ABA\u2010priming",
        "SbNAC21\u20101",
        "drought tolerance",
        "sweet sorghum"
    ],
    "methods": null,
    "publication_date": "2025-04-24",
    "pubmed_id": "40269610",
    "results": null,
    "title": "Unlocking the Synergy: ABA Seed Priming Enhances Drought Tolerance in Seedlings of Sweet Sorghum Through ABA-IAA Crosstalk.",
    "xml": "<Element 'PubmedArticle' at 0x788505e4aed0>"
}