A novel bud mutation that confers abnormal patterns of lycopene accumulation in sweet orange fruit (Citrus sinensis L. Osbeck)

Journal of Experimental Botany
Qing LiuJianqin Gu

Abstract

A novel, pleiotropic sweet orange (Citrus sinensis L. Osbeck) mutant, 'Hong Anliu', is described. This mutation causes carotenoid accumulation, high sugar, and low acid in the fruits. Gas chromatographic analysis revealed that high sugar and low acid in the fruit were caused by the accumulation of sucrose and the deficiency of citric acid. The dominant carotenoid accumulated in albedo, segment membranes, and juice sacs is lycopene, which can reach levels that are a 1000-fold higher than those in comparable wild-type fruits. This mutation does not affect the carotenoid composition of leaves. Carotenoid concentration and biosynthetic gene expression of albedo, segment membranes, and juice sacs were dramatically altered by the mutation. Lycopene accumulation in the juice sacs was regulated by co-ordinate expression of carotenoid biosynthetic genes. However, in albedo and segment membranes, the expression of downstream carotenogenic genes seems to be feedback induced by lycopene accumulation. This implies that there must be at least two modes regulating lycopene accumulation in 'Hong Anliu' fruit. Taken together, these results suggest that massive amounts of lycopene might be synthesized in the juice sacs and then transported to th...Continue Reading

Citations

Sep 21, 2013·Journal of Chromatographic Science·Hussein G DaoodLajos Helyes
Jul 7, 2011·Journal of the Science of Food and Agriculture·Ying LeiJin-Yin Chen
Jun 22, 2013·Physiologia Plantarum·Yunliu ZengXiuxin Deng
Mar 10, 2015·Molecular Genetics and Genomics : MGG·Xiongjie ZhengZhiyong Pan
Sep 16, 2014·Plant Science : an International Journal of Experimental Plant Biology·Xu WeiFrederick G Gmitter
Feb 2, 2017·Journal of Agricultural and Food Chemistry·Elisa BrasiliFranco M Lajolo

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