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. 2015 Dec 29;67(5):1505–1517. doi: 10.1093/jxb/erv546

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© The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 1. — Proposed ﬂavonol biosynthesis and modiﬁcation pathway in A. thaliana.

The compounds detected in A. thaliana are given. White arrows indicate proposed but unidentiﬁed reactions. The metabolite flavonol 3-O-gentiobioside 7-O-rhamnoside (F3GG7R), which is in the focus of this paper, is shown in the white box. CHI, chalcone isomerase; CHS, chalcone synthase; DFR, dihydroflavonol reductase; F3AraT, ﬂavonol 3-O-arabinosyltransferase; F3H, flavanone 3-hydroxylase; F3RhaT, ﬂavonol 3-O-rhamnosyltransferase; F3′H, flavonoid 3′-hydroxylase; F7GlcT, ﬂavonol 7-O-glucosyltransferase; F7RhaT, ﬂavonol 7-O-rhamnosyltransferase; Fd3GGlcT, flavonoid 3-O-glucoside glucosyltransferase; Fd3GlcT, ﬂavonoid 3-O-glucosyltransferase; FLS, flavonol synthase; LDOX, leucoanthocyanidin reductase (anthocyan synthase); OMT1, O-methyltransferase1. Modified according to Saito et al. (2013) and Stracke et al. (2010), and incorporating data from Yonekura-Sakakibara et al. (2014).