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Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (11): 2846-2860.doi: 10.16420/j.issn.0513-353x.2024-0889

• Genetic & Breeding·Germplasm Resources·Molecular Biology • Previous Articles     Next Articles

Screening and Validation of Interacting Proteins of the Grape Ovule Development Transcription Factor VvDDF2

LIU Miaomiao, YAO Jin, ZOU Fuyan, CHU Yanyan, and WANG Xiping*()   

  1. State Key Laboratory for Crop Stress Resistance and High-Efficiency ProductionKey Laboratory of Northwest Horticultural Crop Biology and Germplasm Creation,Ministry of Agriculture and Rural Affairs,College of Horticulture,Northwest A & F University,Yangling, Shaanxi 712100, China
  • Received:2025-03-22 Revised:2025-07-02 Online:2025-11-26 Published:2025-11-26
  • Contact: and WANG Xiping

Abstract:

In order to investigate the regulatory mechanism of the grape transcription factor VvDDF2 in ovule development and seedless traits formation,the yeast two-hybrid bait vector pGBKT7-VvDDF2 was constructed. It was verified that VvDDF2 had transcriptional self-activation activity and the active region was located at the C terminal. Using yeast two-hybrid system(Y2H),14 candidate interacting proteins of VvDDF2 were screened from the yeast cDNA yeast library related to the development of grape ovule,including lipase,amine oxidase,exocyst complex component,large ribosomal subunit protein and other enzymes and proteins,which are mainly involved in cell division,growth,and morphogenesis,embryonic development,plant hormone signal transduction and fertility regulation,as well as biosynthesis and metabolic reactions of various substances,and play an important biological function in the process of plant seed development. The interaction between VvDDF2 and VvEXO70A1 was further verified by yeast two-hybrid system(Y2H),bimolecular fluorescence complementation(BiFC)and luciferase reporter system(Split-Luc). RT-qPCR analysis showed that the expression level of VvEXO70A1 during the development of grape ovule were significantly different between seeded and seedless grapes. In summary,VvDDF2 and VvEXO70A1 may form a complex through protein interaction to synergistically regulate the development process of grape ovule.

Key words: grape, seedless mechanism, ovule development, VvDDF2, protein interaction, VvEXO70A1