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| Functional Analysis of the PpMYB113 Gene in Anthocyanin Synthesis and Accumulation in Peach (Prunus persica) |
| ZHOU Shu-Ting1,2, LI Mao-Fu1,3,4, WANG Hua1,3,4, SUN Pei1,3,4, KANG Yan-Hui1,3,4, SUN Xiang-Yi1,3,4, WU Jun-Kai2, ZHANG Li-Bin2,*, JIN Wan-Mei1,3,4,* |
1 Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China;
2 College of Horticultural Science and Technology, Hebei Normal University of Science and Technology, Qinhuangdao 066600;
3 Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (North China), Ministry of Agriculture and Rural Affairs, Beijing 100093, China;
4 Beijing Engineering Research Center for Deciduous Fruit Trees, Beijing 100093, China |
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Abstract MYB transcription factors play a crucial role in the accumulation of anthocyanins in peach (Prunus persica) fruit. A deeper understanding of MYB transcription factors is beneficial for elucidating the molecular regulatory mechanism of secondary metabolic networks in peach, providing a theoretical basis for genetic improvement, and developing new varieties rich in anthocyanins. In this study, in order to investigate the role of PpMYB113 in the accumulation of anthocyanins in peach flowers and fruits, the PpMYB113 gene (GenBank No. XM_007216468.2) was cloned using red flesh peach as the experimental material. The bioinformatics and expression pattern analysis was performed, and the function of PpMYB113 gene was studied through transient transformation in tobacco (Nicotiana benthamiana) and peach flesh. The results showed that the open reading frame of PpMYB113 gene was 720 bp, encoding 239 amino acids. The phylogenetic tree analysis indicated that the PpMYB113 protein sequence had the closest phylogenetic relationship with the MYB transcription factors of the S6 subfamily in Arabidopsis thaliana. The expression of PpMYB113 gene was analyzed in petals, branches, leaves, bark, fruit skin, and fruit flesh of peach by using semi-quantitative RT-PCR and RT-qPCR. The results indicated that PpMYB113 gene was highly expressed in petals, fruit skin, and fruit flesh, while it was not expressed in branches, leaves, and bark. At the same time, PpMYB113 was overexpressed in tobacco leaves and white fruit flesh using the transient transformation system. The overexpressed tobacco leaves and white fruit flesh showed red color phenotype and the anthocyanin contants were significant increase. In the overexpressed tobacco leaves and white fruit flesh areas, the expression of PpMYB113 was significantly higher than that of the control, and the expression of ANS (anthocyanidin synthase) and UFGT (UDP glucose: flavonoid-3-O-glucosyltransferase) genes were significantly up-regulated. Based on these findings, it was concluded that PpMYB113 plays a positive promoting role in the accumulation of anthocyanins in peach. These results provide a foundation for further investigation into the molecular regulatory mechanism of MYB transcription factors in the accumulation of anthocyanin in red flesh peach.
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Received: 01 April 2024
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Corresponding Authors:
* zhanglibin9364@163.com; jwm0809@163.com
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