Molecular regulation and domestication of parthenocarpy in cucumber.

• Tác giả: Yicong Guo, Hongyu Huang, Weiliang Kong, Hujian Li, Wenbo Li, Yuhe Li, Tao Lin, Lijun Lv, Nan Ma, Jing Nie, Yuzi Shi, Xiaolei Sui, Chuanqing Sun, Sheng Wu, Lingjun Xu, Zhen Yang, Lidong Zhang, Qian Zhang, Zhonghua Zhang
• Ngôn ngữ: eng
• Ký hiệu phân loại: 155.282 Diagnostic graphology
• Thông tin xuất bản: England : Nature plants , 2025
• Bộ sưu tập: NCBI
• ID: 217269

Tóm tắt

Parthenocarpy is a pivotal trait that enhances the yield and quality of fruit crops by enabling the development of seedless fruits. Here we unveil a molecular framework for the regulation and domestication of parthenocarpy in cucumber (Cucumis sativus L.). We previously discovered a natural non-parthenocarpic mutant and demonstrated that the AP2-like transcription factor NON-PARTHENOCARPIC FRUIT 1 (NPF1) is a central regulator of parthenocarpy through activating YUC4 expression and promoting auxin biosynthesis in ovules. A Phe-to-Ser substitution at amino acid residue 7 results in a stable form of NPF1 that is localized in the nucleus. An A-to-G polymorphism (SNP-383) within an NPF1-binding site in the YUC4 promoter significantly enhances the activation of NPF1 towards YUC4, leading to an increased rate of parthenocarpy. Additionally, NPF1 influences bitterness by reducing cucurbitacin C biosynthesis through the suppression of Bt expression. Our results suggest a two-step evolutionary model for parthenocarpy and fruit bitterness during cucumber domestication.