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Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (9): 2377-2386.doi: 10.16420/j.issn.0513-353x.2024-0842

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

Cloning and Preliminary Functional Exploration of the Transposon-Derived Gene RcHTD in Rose

LI Maofu1,2,3, YANG Yuan1,2,4, WANG Hua1,2,3, SUN Pei1,2,3, KANG Yanhui1,2,3, SUN Xiangyi1,2,3, LUO Jie1,2,3, LIU Xin1,2,3, JIN Min1,2,3, JIN Wanmei1,2,3,*()   

  1. 1 Institute of Forestry and PomologyBeijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China
    2 Key Laboratory of Biology and Genetic Improvement of Horticultural Crops(North China)Ministry of Agriculture, Beijing 100093, China
    3 Beijing Engineering Research Center of Functional Floriculture, Beijing 100093, China
    4 Beijing Engineering Research Center for Deciduous Fruit Trees, Beijing 100093, China
  • Received:2025-01-05 Revised:2025-04-07 Online:2025-09-25 Published:2025-09-24
  • Contact: JIN Wanmei

Abstract:

To investigate the regulatory role of Harbinger transposon-derived genes in anthocyanin synthesis in rose,the petals of the rose variety(Rosa chinensis‘Slater’s Crimson China’)were used as experimental material. In preliminary experiments,Rosa1 was employed as bait to screen a petal cDNA library,resulting in the identification of an interacting gene. This study successfully cloned the gene and characterized it as a transposon-derived gene,named RcHTD,which has an open reading frame of 1 560 bp and encodes 519 amino acids. Multiple sequence alignment analysis revealed that RcHTD encompasses a DDE transposon subfamily domain. Phylogenetic tree analysis indicated that RcHTD clustered closely with the genes AT5G12010,AT4G29780,AtALP1 and AtHHP1,which encode Harbinger-type transposases. Expression profilingof RcHTD in different developmental stages and tissues of Rosa chinensis‘Slater’s Crimson China’petals showed that RcHTD is expressed in all stages and tissues. Subcellular localization studies confirmed that the RcHTD protein is localized in the cell nucleus. Yeast two-hybrid experiments indicated that RcHTD physically interacts with RcMYB114. EMSA experiments further confirmed that RcHTD specifically binds to the RcMYB114 promoter,indicating its role in regulating anthocyanin synthesis,thereby consequently influencing the coloration of rose red petal.

Key words: Rosa chinensis, transposon-derived genes, RcHTD, gene function