期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
卷 168, 期 -, 页码 40-49出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotobiol.2017.01.017
关键词
Malus sp.; 'Radiant'; Fruit; Flavonoids; Colouration; Shade
资金
- National Natural Science Foundation of China [31200213]
- Project of Construction of Innovative Teams and Teacher Career Development for Universities and Colleges Under Beijing Municipality [IDHT20150503]
- Beijing Municipal Commission of Education Science and Technology Promotion Plan [PXM2014-014207-000081]
- National High Technology Research and Development Program of China (863 program) [2011AA100204]
- Agricultural Science and Technology Project of Beijing Municipal Commission of Rural Affairs [20150121]
- Beijing Collaborative Innovation Center for Eco-environmental Improvement with Forestry and Fruit Trees [CEFF-PXM2016-014207-000038]
- Opening Project of Beijing Key Laboratory of New Technology in Agricultural Application [KF2016024]
- Scientific Research Improvement Project of Beijing University of Agriculture [GZL2014003]
Fruit pigment accumulation, which represents an important indicator of nutrient quality and appearance value, is often affected by low light under rain, cloud, fog and haze conditions during the veraison period. It is not known whether continuous low light interferes with the production and accumulation of secondary metabolites in veraison fruit. In this paper, we measured pigments and the transcriptional level of genes related to secondary metabolites, i.e., flavonoid biosynthesis in the peel and flesh of Malus crabapple 'Radiant' fruit in response to normal light and shade from 10th July to 30th August. The results showed crosstalk between the flavonoid biosynthetic genes and the involvement of key transcription factors such as McMYB4, McMYB7, McMYB10, and McMYB16 in the regulation of the ratio of anthocyanins and flavanols, which accounted for the different colouration of the fruit peel and flesh under shade conditions. A model is proposed for the regulation of the flavonoid pathway in the peel and flesh of 'Radiant' fruit based on our study results. Moreover, the molecular mechanism for 'Radiant' fruit colouration provides reference information for understanding the light regulatory mechanism involved in the biosynthesis of flavonoids and for designing the next generation of apple breeding. (C) 2017 Elsevier B.V. All rights reserved.
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