Tricin levels and expression of flavonoid biosynthetic genes in developing grains of purple and brown pericarp rice

PeerJ
Alexander PoulevFaith C Belanger

Abstract

The methylated flavone tricin has been associated with numerous health benefits, including reductions in intestinal and colon cancers in animal models. Tricin is found in a wide range of plant species and in many different tissues. However, whole cereal grains, such as rice, barley, oats, and wheat, are the only food sources of tricin, which is located in the bran portion of the grain. Variation in tricin levels was found in bran from rice genotypes with light brown, brown, red, and purple pericarp color, with the purple pericarp genotypes having the highest levels of tricin. Here, we analyzed tricin and tricin derivative levels in developing pericarp and embryo samples of a purple pericarp genotype, IAC600, that had high tricin and tricin derivative levels in the bran, and a light brown pericarp genotype, Cocodrie, that had no detectable tricin or tricin derivatives in the bran. Tricin and tricin derivatives were detected in both the pericarp and embryo of IAC600 but only in the embryo of Cocodrie. The purple pericarp rice had higher total levels of free tricin plus tricin derivatives than the light brown pericarp rice. When expressed on a per grain basis, most of the tricin component of IAC600 was in the pericarp. In contrast...Continue Reading

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Citations

Apr 2, 2020·Frontiers in Genetics·Edwige Gaby Nkouaya MbanjoNese Sreenivasulu

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Datasets Mentioned

BETA
PRJNA490738

Methods Mentioned

BETA
RNA-Seq
RNAseq
PCR
transgenic

Software Mentioned

Cutadapt
Seq
GraphPad
Dionex
Xcalibur
CLC Genomics Workbench
Prism
FastQC
SciFinder
SII

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