Research articles
ScienceAsia 48 (2022):ID 263-269 |doi:
10.2306/scienceasia1513-1874.2022.044
Metabolite accumulation and inhibition of hypocotyl
elongation by blue light induction in Amaranthus tricolor L.
Fang Xiao, Xiao Wang, Shengcai Liu*
ABSTRACT: Red amaranth is an important fresh vegetable with valuable nutritional properties. Blue light is favorable
for the accumulation of many metabolites and inhibits hypocotyl elongation in plants. However, the relation between
metabolite induction and the inhibition of hypocotyl elongation by blue light in red amaranth is unclear. Here, we used
LC-MS/MS-based widely targeted metabolomics to identify key compounds and to compare the metabolite composition
of red amaranth under dark and blue light conditions. A total of 444 metabolites were identified, 37 of which differed
between the two conditions. A pathway enrichment analysis also identified significant differences between the two
conditions. Fifteen lipids, all up-regulated under the blue light, were significantly different. The amino acid content
was lower under the blue light than under the dark condition. We found cyanidin chloride and anthocyanin 3-O-betaD-glucoside which are the two components involved in the anthocyanin pathway. Our results verify the high nutritional
quality of the red amaranth and suggest that blue light influences metabolite synthesis and hypocotyl elongation in the
species.
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* Corresponding author, E-mail: 1215698900@qq.com
Received 11 Sep 2020, Accepted 8 Jul 2021
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