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植物研究 ›› 2026, Vol. 46 ›› Issue (5): 838-850.doi: 10.7525/j.issn.1673-5102.2026.05.006

• 研究论文 • 上一篇    下一篇

紫斑牡丹PrGSTF12基因克隆、表达分析及功能验证

陈思彤, 罗莎, 张倩洳, 李佳浍, 陶晨, 史倩倩()   

  1. 西北农林科技大学风景园林艺术学院,杨凌 712100
  • 收稿日期:2026-04-14 出版日期:2026-08-28 发布日期:2026-10-10
  • 通讯作者: 史倩倩 E-mail:shiqianqian2005@163.com
  • 作者简介:陈思彤(2005—),女,本科在读,主要从事园林植物观赏性状相关研究。
  • 基金资助:
    国家自然科学基金面上项目(32371953)

Cloning, Expression Analysis and Functional Verification of the PrGSTF12 Gene from Paeonia rockii

Sitong CHEN, Sha LUO, Qianru ZHANG, Jiahui LI, Chen TAO, Qianqian SHI()   

  1. College of Landscape Architecture and Art,Northwest A & F University,Yangling 712100
  • Received:2026-04-14 Online:2026-08-28 Published:2026-10-10
  • Contact: Qianqian SHI E-mail:shiqianqian2005@163.com

摘要:

谷胱甘肽转移酶(glutathione S-transferases,GST)基因在植物花青苷积累过程中发挥重要作用。为明确GSTs在紫斑牡丹(Paeonia rockii)花瓣基部色斑的花青苷转运与积累中的作用,本研究以紫斑牡丹为试验材料,测定不同发育时期花瓣的花色值及类黄酮组分和含量。结果表明:芍药素和矢车菊素是影响花瓣基部色斑形成的主要色素成分。在此基础上,从紫斑牡丹花瓣转录组数据中筛选并克隆得到差异表达基因PrGSTF12,并对其进行亚细胞定位、表达分析及病毒诱导的基因沉默(VIGS)试验。进化树分析表明,PrGSTF12基因与已报道的参与花青苷转运的GSTs亲缘关系密切。亚细胞定位结果表明,PrGSTF12定位于液泡膜,提示其在该部位发挥作用。实时荧光定量分析表明,PrGSTF12基因在花瓣基部色斑部位的表达量显著高于无斑部位,且其表达水平与花瓣局部花青苷积累程度呈正相关。VIGS试验结果表明,沉默PrGSTF12后,紫斑牡丹花瓣基部色斑明显褪色,花青苷含量显著降低,同时花青苷合成相关结构基因PrCHS、PrCHI、PrF3H、PrF3'H、PrDFR和PrANS的表达量均显著下调。综上所述,PrGSTF12在紫斑牡丹花瓣基部色斑的花青苷转运与积累过程中发挥重要作用,并参与色斑形成的调控。

关键词: 紫斑牡丹, 色斑, PrGSTF12基因, 基因克隆, 功能验证

Abstract:

Glutathione S-transferase(GST) genes play a crucial role in plant anthocyanin accumulation. To clarify the roles of GSTs in anthocyanin transport and accumulation in the petal blotches of Paeonia rockii, color indices, flavonoid components and contents were determined in petals at different developmental stages. The results indicated that peonidin and cyanidin were the major pigments responsible for the formation of petal blotches. Subsequently, a differentially expressed GST gene, PrGSTF12, was identified and cloned from the petal transcriptome of P. rockii. Subcellular localization, expression analysis, and virus-induced gene silencing(VIGS) were performed to investigate its biological function. Phylogenetic analysis revealed that PrGSTF12 had a close genetic relationship with known GSTs involved in anthocyanin transport. Subcellular localization assays indicated that PrGSTF12 was targeted to the tonoplast, suggesting its function in this cellular compartment. Quantitative real-time PCR analysis showed that the expression level of PrGSTF12 was significantly higher in the basal blotch site than that in the non-blotch site of petals, and its expression level was positively correlated with local anthocyanin accumulation. The VIGS assay demonstrated that silencing PrGSTF12 resulted in noticeable fading of the petal basal blotches, accompanied by a significant reduction in anthocyanin content. Meanwhile, the expression levels of anthocyanin synthesis-related genes, including PrCHS, PrCHI, PrF3H, PrF3'H, PrDFR and PrANS, were markedly decreased. In summary, these results demonstrate that PrGSTF12 plays important roles in anthocyanin transport and accumulation in the petal basal blotches of P. rockii and contributes to basal blotch formation.

Key words: Paeonia rockii, petal blotch, PrGSTF12 gene, gene cloning, functional verification

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