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Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (11): 2835-2845.doi: 10.16420/j.issn.0513-353x.2025-0250

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

Identification of PpTRM Gene Family Members and Screening the Interacting PpTRMs with the Fruit Shape Regulator PpOFP1 in Peach

SU Yanyan, WANG Yutong, JING Yanfu, XU Yaoguang, YU Yang, and XIE Hua*()   

  1. Beijing Key Laboratory of Agricultural Genetic Resources and BiotechnologyBeijing Key Laboratory of Crop Molecular Design and Intelligent Breeding,Institute of Biotechnology,Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
  • Received:2025-04-20 Revised:2025-10-24 Online:2025-11-26 Published:2025-11-26
  • Contact: and XIE Hua

Abstract:

Flat peach,with its unique flat fruit shape,provide an ideal material for analyzing the mechanism of fruit shape regulation. Previous studies have confirmed that PpOFP1 is a key regulator of flat fruit formation in peach;however,its molecular regulatory network remains unclear. Studies have shown that TRMs(TONNEAU1 Recruiting Motif proteins)interact with OFP family proteins though a conserved M8 domain,and this interaction plays a pivotal role in regulating tomato fruit shape. In this study,a total of 12 TRM family members were identified in peach,and phylogenetic analysis revealed their classification into four evolutionary clades. The analysis of protein conserved motifs revealed that 8 of these members contain the conserved M8 domain,which is essential for TRM-OFP interaction. In this

study,we also found that PpTRM5,PpTRM17,PpTRM18,and PpTRM26 were confirmed to interact with PpOFP1 through yeast two-hybrid assay,luciferase complementation assay,and bimolecular fluorescence complementation analysis,and this interaction occurs in the cytoplasm and cell membrane. Transcriptome analysis indicated that PpTRM17was highly expressed during the first rapid growth phase of both flat and round peach fruits,which was consistent with the high expression of PpOFP1 in flat peaches during this period,revealing that the two might jointly regulate the formation of flat fruit shape in flat peaches.

Key words: peach, fruit shape, PpTRM gene family, protein interaction