FaMYB11 promotes the accumulation of volatile esters by regulating FaLOX5 during strawberry (Fragaria × ananassa) ripening

Hongyan Lu, Zisheng Luo, Dong Li, Yunhong Jiang, Li Li

Research output: Contribution to journalArticlepeer-review

Abstract

Aroma is a vital characteristic that determines the quality and commercial value of fruit. Fatty acids (FAs) are key precursors for fruit aroma volatiles. In Arabidopsis thaliana, TT2/MYB123 inhibited the seed embryo FA biosynthesis. We analyzed the function and regulation of the MYB123 homolog (Fragaria × ananassa [Fa] MYB11) for FA metabolism, especially lipoxygenase (LOX) pathway. FaLOX5 was correlated with volatile esters formation. FaMYB11 was a functional homologue of the AtTT2/AtMYB123 and a nucleus-localized ripening-related R2R3 MYB transcription factor (TF). FaMYB11 overexpression advanced ripening initiation, volatiles accumulation, whereas its silencing delayed these events. Volatile-related genes in LOX pathway were significantly upregulated in FaMYB11 overexpression fruit and downregulated in its silencing fruit. We also demonstrated that FaMYB11 could physically bind to and trans-activate FaLOX5 promoter. In conclusion, we proposed that FaMYB11 could promoted the volatile accumulation partly through the transcriptional regulation of FaLOX5 during strawberry ripening.
Original languageEnglish
Article number111560
Number of pages12
JournalPostharvest Biology and Technology
Volume178
Early online date17 Apr 2021
DOIs
Publication statusE-pub ahead of print - 17 Apr 2021

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