Figure 8.

Tuber carotenoid concentrations and gene expression. (a) Carotenoid biosynthetic pathway in plants. PSY1 and 2, phytoene synthase isoforms; PDS, phytoenedesaturase; Z-ISO, ζ -carotene isomerase; ZDS, ζ -carotene desaturase; CRT iso, carotene isomerase; LCY-b1 and b2, lycopene β cyclase isoforms; LCY-e, lycopene ε cyclase; CHY1, and 2, β carotene hydroxylase isoforms, ZEP, zeaxanthin epoxidase; VDE, violaxanthin de-epoxidase; NXS, neoxanthin synthase, LUT1, carotene hydroxylase (Diretto et al., 2006, Zhu et al., 2010). (b) concentrations of five anthocyanins measured by HPLC in tubers from six locations. (c) Expression of seven genes downstream of lycopene. Viola, violaxanthin; Neo, neoxanthin; Anthera, antheraxanthin; Zea, zeaxanthin. The data represents the means ± SE of three biological replicates. Locations with same letter are not significantly different (p < 0.05)

Payyavula et al. BMC Plant Biology 2012 12:39   doi:10.1186/1471-2229-12-39
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