Lycopene cyclases determine high alpha-/beta-carotene ratio and increased carotenoids in bananas ripening at high temperatures
文献类型： 外文期刊
作者： Fu, Xiumin 1 ; Cheng, Sihua 1 ; Feng, Chao 1 ; Kang, Ming 1 ; Huang, Bingzhi 4 ; Jiang, Yueming 1 ; Duan, Xuewu 1 ; Grier 1 ;
作者机构： 1.Chinese Acad Sci, South China Bot Garden, Key Lab South China Agr Plant Mol Anal & Genet Im, Xingke Rd 723, Guangzhou 510650, Guangdong, Peoples R China
2.Chinese Acad Sci, South China Bot Garden, Guangdong Prov Key Lab Appl Bot, Xingke Rd 723, Guangzhou 510650, Guangdong, Peoples R China
3.Univ Chinese Acad Sci, Coll Adv Agr Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
4.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Guangzhou 510640, Guangdong, Peoples R China
5.Univ Nottingham, Sch Biosci, Plant & Crop Sci Div, Sutton Bonington Campus, Loughborough LE12 5RD, Leics, England
6.Zhejiang Univ, Zhejiang Prov Key Lab Hort Plant Integrat Biol, Coll Agr & Biotechnol, Zijingang Campus, Hangzhou 310058, Zhejiang, Peoples R China
关键词： Banana pulp; Carotenoid; High alpha-/beta-carotene ratio; Light stimulation; Lycopene cyclase; Temperature-dependent
期刊名称：FOOD CHEMISTRY （ 影响因子：7.514； 五年影响因子：7.516 ）
ISSN： 0308-8146
年卷期： 2019 年 283 卷
页码：
收录情况： SCI
摘要： Bananas are a recommended food source to alleviate vitamin A deficiency because they contain a high ratio of provitamin A precursors. The objective of this study was to investigate carotenoid accumulation pattern in banana fruits during postharvest ripening and the mechanisms regulating this process. Ripe banana pulp had an unusually high alpha-/beta-carotene ratio (1.05), and the carotenoid contents increased (p <= 0.05) under light and high temperature. We analyzed the sequences, transcript levels, and functions of genes involved in carotenoid synthesis. The high ratio of alpha-/beta-carotene in ripe banana fruit was explained by the high flux to the a-carotene biosynthetic pathway, as reflected by high transcript levels of LCYE, and the weak flux to the beta-carotene branch of the biosynthetic pathway due to inactive MaLCYB1.2. High temperature during ripening up-regulated the transcript levels of genes involved in the alpha- and beta-carotene biosynthesis pathways and the activities of their encoded enzymes.
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