Blue light induces leaf color change by modulating carotenoid metabolites in orange-head Chinese cabbage(Brassica rapa L.ssp. pekinensis)  

作　　者：ZHANG Rui-xing ZHANG Ni-nan WANG Ya-xiu Khan ABID MA Shuai BAI Xue ZENG Qi PAN Qi-ming LI Bao-hua ZHANG Lu-gang 

机构地区：[1]State Key Laboratory of Crop Stress Biology for Arid Areas,College of Horticulture,Northwest A&F University,Yangling 712100,P.R.China [2]Department of Horticulture,The University of Haripur,Haripur 22620,Pakistan

出　　处：《Journal of Integrative Agriculture》2023年第11期3296-3311,共16页农业科学学报（英文版）

基　　金：supported by the National Key Research and Development Program of China (2017YFD0101802 and 2016YFD0101701 );the Key Research and Development Program of Yangling Seed Innovative Center, China (Ylzy-sc-04);the Key Research and Development Program of Shaanxi Province, China (2023YBNY-078)。

摘　　要：Carotenoids are involved in the formation of plant leaf color as well as photosystem photoprotection. This study showed that blue light significantly induced up-regulation of the total carotenoid content in the inner leaves of orange-head Chinese cabbage(OHCC). Furthermore, the transcriptomic analysis revealed that blue light treatment induced upregulation of genes in photosynthesis(BrHY5-2, BrCOP1 and BrDET1) and the methylerythritol 4-phosphate pathways(BrGGPS, BrDXS and BrHDR) upstream of the carotenoid metabolic pathway. Carotenoid metabolomic analysis revealed that the accumulation of several orange and red carotenoids(lycopene, zeaxanthin, β-carotene, lutein, and β-cryptoxanthin) after blue light treatment contributed to the deepening of the leaf coloration, suggesting that short-term blue light treatment could be used to boost nutritional quality. The light signal gene BrHY5-2 participated in the blue light-induced transcriptional regulation of carotenoid biosynthesis in OHCC. Overexpression of BrHY5-2 in Arabidopsis significantly increased the total carotenoid content and the sensitivity to blue light. The above findings revealed new insights about blue-light-induced carotenoid synthesis and accumulation in OHCC lines. They suggested a new engineering approach to increase the nutritional value of vegetables.

关 键 词：orange-head Chinese cabbage(OHCC) CAROTENOID nutrition blue LED light secondary metabolite transcriptome 

分 类 号：S634.1[农业科学—蔬菜学]