文献类型： 外文期刊

作者： Liu, Weina ¹ ; Ye, Qiang ¹ ; Jin, Xaioqin ¹ ; Han, Fengqin ¹ ; Huang, Xinzhong ² ; Cai, Shenghua ² ; Yang, Li ¹ ;

作者机构： 1.Zhejiang Normal Univ, Coll Chem & Life Sci, Jinhua 321004, Zhejiang, Peoples R China

2.Fujian Acad Agr Sci, Fruit Res Inst, Fuzhou 350013, Fujian, Peoples R China

关键词： Red-fleshed pummelo (Citrus grandis);Guanxi pummelo (Citrus grandis);Spontaneous mutant;Lycopene accumulation;Gene expression

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

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收录情况： SCI

摘要： Carotenoids are the second-most widespread pigments in nature and play crucial roles in plants, animals and humans. As one of the main fruit crops worldwide, citrus is an important source of carotenoids, and approximately 115 carotenoid compounds occur in citrus fruit. Recently, Red-fleshed pummelo, a spontaneous bud mutant of Guanxi pummelo that accumulate high-level carotenoids in edible portions, was discovered. The fruits, especially the juice sacs of Red-fleshed pummelo are light red in color, which is a feature of great interest to consumers and producers. In this study, the composition, content, characteristics of the lycopene beta-cyclase (beta-LCY) gene, and expression models of genes involved in the lycopene biosynthetic pathway of Red-fleshed and Guanxi pummelo fruit juice sacs were examined. Lycopene and beta-carotene are the main pigments in Red-fleshed pummelo fruits, whereas the contents of these pigments are too low to be detected in Guanxi pummelo fruits. Four of the amino acids deduced from beta-LCY cDNA were found to differ between Red-fleshed and Guanxi pummelo. Lycopene and beta-carotene accumulation in Red-fleshed pummelo fruits were related to variation in the expression of genes related to the lycopene biosynthetic pathway, which mainly associated with the up-regulated expression of upstream genes and down-regulated expression of downstream genes in the lycopene biosynthesis pathway. This is a first reports of the biochemical and molecular investigation about Red-fleshed fruit mutant in pummelo. (C) 2015 Elsevier B.V. All rights reserved.