Biosynthesis and accumulation of multi-vitamins in black sweet corn (Zea maysL.) during kernel development

作者：Hu, Xiaodan; Liu, Jianhua; Li, Wu; Wen, Tianxiang; Li, Tong; Guo, Xinbo^*; Liu, Rui Hai^*

来源：Journal of the Science of Food and Agriculture, 2020, 100(14): 5230-5238.

DOI：10.1002/jsfa.10573

• kernel development
• biosynthesis
• vitamin C
• carotenoid
• vitamin E
• folate

BACKGROUND Black sweet corn as an edible fruit has various nutritional qualities. This study discusses changes in the vitamin C and E, folate, and carotenoid content during black sweet corn maturation, and also the effects of preharvest weather conditions and of related genes in multi-vitamin biosynthesis pathways. RESULTS Most vitamin levels improved, especially vitamin C and carotenoid levels, while the folate content dropped rapidly. Transcript levels of most genes in folate biosynthesis showed trends that were similar to the content changes.VTC2andGLDH,which are regulated by light, had high expression levels leading to an increase in ascorbate content during maturation.gamma-Tocotrienol is the main vitamin E component, andHGGT,the key gene controlling the synthesis of tocotrienols, had a much higher expression level than other genes. Lutein and zeaxanthin were the dominant carotenoid components. A rapid reduction in the transcription level of LCY epsilon could result in a lower lutein production rate . CONCLUSION Black sweet corn has a high nutritional value and is rich in vitamins, including zeaxanthin,gamma-tocotrienols, and ascorbic acid. The best harvest time is between 20-25 days after pollination (DAPs) when kernels had a good taste as well as relatively high vitamin levels.

• 单位
  广东省农业科学院