Metabolomic and transcriptomic analyses provide insights into temperature and light regulated anthocyanin accumulation in flesh of ‘Furongli’ plum (Prunus salicina Lindl.)

TL;DRAbstract

Anthocyanins are health-promoting pigments that contribute to the quality of fruits. Anthocyanin biosynthesis is affected by light and temperature. However, there is no information available on the effects of light and temperature on anthocyanin accumulation in plum flesh. In this study, we investigated the effects of temperature and light on anthocyanin accumulation in postharvest ‘Furongli’ plum ( Prunus salicina Lindl.) flesh and found that 20◦C promoted anthocyanin accumulation with or without light. However, no significant anthocyanin accumulation was detected in the flesh of plums treated with 30 ◦C/light. RNA-Seq analysis showed that the transcript levels of anthocyanin accumulation-related genes in the flesh were upregulated by 20◦C/light and 20◦C/dark treatments. Moreover, several genes involved in sucrose metabolism as well as plant hormone biosynthesis and signal transduction were transcriptionally correlated with anthocyanin accumulation. NAA treatment confirmed that auxin

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