Flavonoid scutellarin positively regulates root length through NUTCRACKER

doi:10.1016/j.pld.2020.08.001

Abstract

Abstract: Exploring approaches to regulate meristem is of special importance and broad interest. In this study, we found that the flavonoid scutellarin, which has a 6-hydroxyl and a 7-glucoside, increased root length through the transcription factor NUTCRACKER (NUC). This root lengthening disappeared in NUC-knockout and reappeared in NUC-rescue plants. Scutellarin induced NUC expression and promoted the division of cortex/endodermal initials. In contrast, naringenin, which has same chemical backbone but without 6-hydroxyl and with 7-hydroxyl group, showed the opposite or no effects. Our results demonstrate that scutellarin promotes root length through NUC-mediated regulatory pathways and reveal that flavonoids with and without the 6-hydroxyl and 7-glucoside have positive and negative effects on meristem size, respectively.

Key words: Root length, Meristem size, Flavonoid, Scutellarin, Naringenin, NUTCRACKER

Xing Huang, Weiqi Li, Xudong Zhang. Flavonoid scutellarin positively regulates root length through NUTCRACKER[J]. Plant Diversity, 2021, 43(03): 248-254.

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