A novel histone methyltransferase gene Cg SDG40 positively regulates carotenoid biosynthesis during citrus fruit ripening

作     者：Jialing Fu Qingjiang Wu Xia Wang Juan Sun Li Liao Li Li Qiang Xu Jialing Fu;Qingjiang Wu;Xia Wang;Juan Sun;Li Liao;Li Li;Qiang Xu

作者机构：National Key Laboratory for Germplasm Innovation&Utilization of Horticultural CropsCollege of Horticulture&Forestry ScienceHuazhong Agricultural UniversityWuhan 430070China Hubei Hongshan LaboratoryWuhan 430070China Institute of Horticultural SciencesJiangxi Academy of Agricultural SciencesNanchang 330200China Plant Breeding and Genetics SectionSchool of Integrative Plant ScienceCornell UniversityNew York 14853USA Robert W.Holley Center for Agriculture and HealthUSDA-Agricultural Research ServiceCornell UniversityNew York 14853USA 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2024年第23卷第8期

页      面：2633-2648页

核心收录：

学科分类：09[农学] 0902[农学-园艺学] 090201[农学-果树学] 

基　　金：supported by the Major Special Projects and Key R&D Projects in Yunnan Province,China(202102AE090054) the National Natural Science Foundation of China(31925034) the Foundation of Hubei Hongshan Laboratory granted to Dr.Qiang Xu,China(2021hszd016) the Key Project of Hubei Provincial Natural Science Foundation,China(2021CFA017) 

主　　题：pummelo SET domain protein epigenetic regulation PSY1 lycopene fruit quality fruit color 

摘      要：The flesh color of pummelo(Citrus maxima)fruits is highly diverse and largely depends on the level of carotenoids,which are beneficial to human *** is vital to investigate the regulatory network of carotenoid biosynthesis to improve the carotenoid content in ***,the molecular mechanism underlying carotenoid accumulation in pummelo is not fully *** this study,we identified a novel histone methyltransferase gene,CgSDG40,involved in carotenoid regulation by analyzing the flesh transcriptome of typical white-fleshed pummelo,red-fleshed pummelo and extreme-colored F1 hybrids from a segregated pummelo *** of CgSDG40 corresponded to flesh color change and was highly coexpressed with ***,CgSDG40 and CgPSY1 are located physically adjacent to each other on the chromosome in opposite directions,sharing a partially overlapping promoter *** localization analysis indicated that CgSDG40 localizes to the *** of CgSDG40 significantly increased the total carotenoid content in citrus calli relative to that in wild *** addition,expression of CgPSY1 was significantly activated in overexpression lines relative to wild *** together,our findings reveal a novel histone methyltransferase regulator,CgSDG40,involved in the regulation of carotenoid biosynthesis in citrus and provide new strategies for molecular design breeding and genetic improvement of fruit color and nutritional quality.