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jrathb-12 mediates JrMYB113 and JrMYB27 to control the anthocyanin levels in different types of red walnut

Journal of Integrative Agriculture 2024年第8期23卷 2649-2661页

作者： Haifeng Xu Guifang Wang Xinying Ji Kun Xiang Tao Wang Meiyong Zhang Guangning Shen Rui Zhang Junpei Zhang Xin Chen Key Laboratory of Huanghuai Protected Horticulture Engineering/National Germplasm Repository of Walnut and Chestnut Shandong Institute of PomologyTai’an 271000China Research Institute of Forestry Chinese Academy of ForestryBeijing 100091China College of Horticulture and Forestry Tarim UniversityAlaer 843300China

Red walnut has broad market prospects because it is richer in anthocyanins than ordinary ***,the mechanism driving anthocyanin biosynthesis in red walnut is still *** studied two types of red walnut,called red walnut 1(R1),with a red pericarp and seed coat,and red walnut 2(R2),with a red seed coat only.R1 mostly contained cyanidin-3-O-galactoside,while R2 contained a various amounts of cyanidin-3-Ogalactoside,cyanidin-3-O-arabinoside,and *** LDOX-2(LOC109007163)and LDOX-3(LOC109010746)genes,which encode leucoanthocyanidin dioxygenase/anthocyanidin synthase(LDOX/ANS),were preliminarily indicated as the crucial genes for anthocyanin biosynthesis in R1 and R2,*** MYB differential genes analysis showed that MYB27 and MYB113 are specifically expressed in the red parts of R1 and R2,respectively,and they are regarded as candidate regulatory *** expression in Arabidopsis and transient injection in walnut showed that both MYB27 and MYB113 were located in the nucleus and promoted anthocyanin accumulation,while MYB27 promoted the expression of LDOX-2,and MYB113 promoted the expression of LDOX-3and *** one-hybrid and electrophoretic mobility shift assays showed that MYB27 could only bind to the LDOX-2 promoter,while MYB113 could bind to the promoters of both LDOX-3 and *** addition,we also identified an HD-Zip transcription factor,ATHB-12,which is specifically expressed in the *** silencing the expression of ATHB-12,the R2 pericarp turned red,and MYB113 expression *** experiments showed that ATHB-12 could specifically interact with MYB113 and bind to its *** suggests that MYB27controls R1 coloration by regulating LDOX-2,while MYB113 controls R2 coloration by regulating LDOX-3 and UAGT-3,but ATHB-12 can specifically bind to and inhibit the MYB113 of the R2 pericarp so that it becomes *** study reveals the anthocyanin biosynthetic mechanisms in two differ

关键词： jrathb-12 JrMYB113 JrMYB27 red walnut anthocyanin biosynthesis

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