CsXDH1 gene promotes caffeine catabolism induced by continuous strong light in tea plant
作者机构：College of Food ScienceSouthwest UniversityChongqing 400715China Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and ChongqingSouthwest UniversityChongqing 400715China Integrative Science Center of Germplasm CreationSouthwest UniversityChongqing 401329China Tea Research InstituteSouthwest UniversityChongqing 400715China
出 版 物：《Horticulture Research》 (园艺研究（英文）)
年 卷 期：2023年第10卷第6期
页 面：263-275页
核心收录：
学科分类：0710[理学-生物学] 09[农学] 090203[农学-茶学] 0902[农学-园艺学]
基 金：This work was supported by the Chongqing Technology Innovation and Application Demonstration Project(cstc2021jscxgksbX0016) the Germplasm Creation Research Program of Southwest University
主 题：metabolism stimulation caffeine
摘 要：Tea plant(Camellia sinensis)is an important cash crop with extensive adaptability in the ***,complex environmental factors force a large variation of tea quality-related *** is essential for the formation of bitter and fresh flavors in tea,and is the main compound of tea that improves human *** strong light stimulation was observed to cause caffeine reduction in tea leaves,but the mechanism is not *** this study,the response of tea plant to light intensity was analysed mainly by multi-omics association,antisense oligodeoxynucleotide(asODN)silencing technique,and in vitro enzyme activity *** results revealed multiple strategies for light intensity adaptation in tea plant,among which the regulation of chloroplasts,photosynthesis,porphyrin metabolism,and resistance to oxidative stress were *** catabolism was enhanced in continuous strong light,which may be a light-adapted strategy due to strict regulation by xanthine dehydrogenase(XDH).asODN silencing and enzymatic activity assays confirmed that CsXDH1 is a protein induced by light intensity to catalyze the substrate ***1 asODN silencing resulted in significant up-regulation of both caffeine and theobromine in in vitro enzyme activity assay,but not in ***1 may act as a coordinator in light intensity adaptation,thus disrupting this balance of caffeine catabolism.
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