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BoaBZR1.1 mediates brassinosteroid-induced carotenoid biosynthesis in Chinese kale

文献类型: 外文期刊

作者: Zhang, Chenlu 1 ; Liang, Qiannan 1 ; Wang, Yilin 1 ; Liang, Sha 1 ; Huang, Zhi 1 ; Li, Huanxiu 1 ; Escalona, Victor Hugo 2 ; Yao, Xingwei 3 ; Cheng, Wenjuan 3 ; Chen, Zhifeng 5 ; Zhang, Fen 1 ; Wang, Qiaomei 6 ; Tang, Yi 1 ; Sun, Bo 1 ;

作者机构: 1.Sichuan Agr Univ, Coll Hort, Chengdu 611130, Peoples R China

2.Univ Chile, Fac Agr Sci, Santiago 8820000, Metropolitan Re, Chile

3.Tianjin Acad Agr Sci, State Key Lab Vegetable Biobreeding, Tianjin 300192, Peoples R China

4.Tianjin Acad Agr Sci, Tianjin 300192, Peoples R China

5.Zunyi Normal Univ, Coll Biol & Agr Technol, Zunyi 563000, Peoples R China

6.Zhejiang Univ, Dept Hort, Hangzhou 310058, Peoples R China

期刊名称:HORTICULTURE RESEARCH ( 影响因子:7.6; 五年影响因子:8.2 )

ISSN: 2662-6810

年卷期: 2024 年 11 卷 6 期

页码:

收录情况: SCI

摘要: Brassinazole resistant 1 (BZR1), a brassinosteroid (BR) signaling component, plays a pivotal role in regulating numerous specific developmental processes. Our study demonstrated that exogenous treatment with 2,4-epibrassinolide (EBR) significantly enhanced the accumulation of carotenoids and chlorophylls in Chinese kale (Brassica oleracea var. alboglabra). The underlying mechanism was deciphered through yeast one-hybrid (Y1H) and dual-luciferase (LUC) assays, whereby BoaBZR1.1 directly interacts with the promoters of BoaCRTISO and BoaPSY2, activating their expression. This effect was further validated through overexpression of BoaBZR1.1 in Chinese kale calli and plants, both of which exhibited increased carotenoid accumulation. Additionally, qPCR analysis unveiled upregulation of carotenoid and chlorophyll biosynthetic genes in the T1 generation of BoaBZR1.1-overexpressing plants. These findings underscored the significance of BoaBZR1.1-mediated BR signaling in regulating carotenoid accumulation in Chinese kale and suggested the potential for enhancing the nutritional quality of Chinese kale through genetic engineering of BoaBZR1.1.

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