Water stress increased the flavonoid content in tannin-free sorghum grains
2021
Pinheiro, Soraia Silva | Cardoso, Leandro de Morais | Anunciação, Pamella Cristine | de Menezes, Cícero Bezerra | Queiroz, Valéria Aparecida Vieira | Martino, Hércia Stampini Duarte | Della Lucia, Ceres Mattos | Pinheiro Sant’Ana, Helena Maria
The effect of water stress on the profile of flavonoids was evaluated in three tannin-containing (SC115, SC60, and SC720) and in three tannin-free (B.Tx635, SA 5330-MARTIN, and SC373) sorghum genotypes. Flavones, flavanones and 3-deoxyanthocyanidins were analyzed by high-performance liquid chromatography with diode array detection. The water stress x genotype interaction increased the sorghum flavones (ranging from 11.3–85.5 μg/g), flavanones (0.14–157.2 μg/g) and 3-deoxyanthocyanidins (5.2–245.3 μg/g) content. The effect of water stress on 3-deoxyanthocyanidins was related to the presence of tannin in sorghum genotypes. Water stress increased the functional potential of sorghum, especially in tannin-free genotypes, by increasing the flavone, flavanone and 3-deoxyanthocyanidin content.
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