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Chromosome-Scale Genome and Comparative Transcriptomic Analysis Reveal Transcriptional Regulators of beta-Carotene Biosynthesis in Mango

文献类型: 外文期刊

作者: Ma, Xiaowei 1 ; Luo, Xiang 2 ; Wei, Yongzan 1 ; Bai, Tuanhui 3 ; Shi, Jiangli 3 ; Zheng, Bing 1 ; Xu, Wentian 1 ; Li, Li 1 ; Wang, Songbiao 1 ; Zhang, Jisen 4 ; Wu, Hongxia 1 ;

作者机构: 1.Chinese Acad Trop Agr Sci, South Subtrop Crops Res Inst, Key Lab Postharvest Physiol & Technol Trop Hort P, Zhanjiang, Peoples R China

2.Henan Univ, State Key Lab Crop Stress Adapt & Improvement, Kaifeng, Peoples R China

3.Henan Agr Univ, Coll Hort, Zhengzhou, Peoples R China

4.Fujian Agr & Forestry Univ, Ctr Genom & Biotechnol, Fuzhou, Peoples R China

关键词: mango; genome; beta-Carotene; transcriptional regulation 2; fruit ripening

期刊名称:FRONTIERS IN PLANT SCIENCE ( 影响因子:6.627; 五年影响因子:7.255 )

ISSN: 1664-462X

年卷期: 2021 年 12 卷

页码:

收录情况: SCI

摘要: Mango (2n = 2x = 40) is an important tropical/subtropical evergreen fruit tree grown worldwide and yields nutritionally rich and high-value fruits. Here, a high-quality mango genome (396Mb, contig N50 = 1.03Mb) was assembled using the cultivar "Irwin" from Florida, USA. A total of 97.19% of the sequences were anchored to 20 chromosomes, including 36,756 protein-coding genes. We compared the beta-carotene content, in two different cultivars ("Irwin" and "Baixiangya") and growth periods. The variation in beta-carotene content mainly affected fruit flesh color. Additionally, transcriptome analysis identified genes related to beta-carotene biosynthesis. MiPSY1 was proved to be a key gene regulating beta-carotene biosynthesis. Weighted gene co-expression network analysis, dual luciferase, and yeast one-hybrid assays confirmed that transcription factors (TFs) MibZIP66 and MibHLH45 activate MiPSY1 transcription by directly binding to the CACGTG motif of the MiPSY1 promoter. However, the two TFs showed no significant synergistic effect on promoter activity. The results of the current study provide a genomic platform for studying the molecular basis of the flesh color of mango fruit.

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