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Position: Home > Articles > A geranylgeranyl pyrophosphate synthase gene, IbGGPS, increases carotenoid contents in transgenic sweetpotato Journal of Integrative Agriculture 2022,21 (9)

A geranylgeranyl pyrophosphate synthase gene, IbGGPS, increases carotenoid contents in transgenic sweetpotato

作者：

Li Rui-jie;Zhai Hong;He Shao-zhen;Zhang Huan;Zhao Ning;Liu Qing-chang

单位：

China Agr Univ, Key Lab Sweetpotato Biol & Biotechnol,Minist Educ, Minist Agr & Rural Affairs,Coll Agron & Biotechno, Beijing Key Lab Crop Genet Improvement,Lab Crop H, Beijing 100193, Peoples R China

关键词：

sweetpotato;Ipomoea batatas (L.) Lam.;IbGGPS;overexpression;carotenoid

摘要：

Geranylgeranyl pyrophosphate synthase (GGPS) plays an important role in the biosynthesis of carotenoids. In a previous study, the IbGGPS gene was isolated from a sweetpotato, Ipomoea batatas (L.) Lam., line Nongdafu 14 with high carotenoid contents, but its role and underlying mechanisms in carotenoid biosynthesis in sweetpotato were not investigated. In the present study, the IbGGPS gene was introduced into a sweetpotato cv. Lizixiang and the contents of beta-carotene, beta-cryptoxanthin, zeaxanthin and lutein were significantly increased in the storage roots of the IbGGPS-overexpressing sweetpotato plants. Further analysis showed that IbGGPS gene overexpression systematically upregulated the genes involved in the glycolytic, 2-C-methyl-D-erythritol-4-phosphate (MEP) and carotenoid pathways, which increased the carotenoid contents in the transgenic plants. These results indicate that the IbGGPS gene has the potential for use in improving the carotenoid contents in sweetpotato and other plants.

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A geranylgeranyl pyrophosphate synthase gene, IbGGPS, increases carotenoid contents in transgenic sweetpotato

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