Cysteine enhances the content of betalains and polyphenols in fresh-cut red beet

被引：26

作者：

Preczenhak, Ana Paula ^{[1
]}

Orsi, Bruna ^{[1
]}

Lima, Giuseppina P. Pereira ^{[2
]}

Tezotto-Uliana, Jaqueline, V ^{[1
]}

Minatel, Igor Otavio ^{[2
]}

Kluge, Ricardo Alfredo ^{[1
]}

机构：

[1] Univ Sao Paulo, Dept Biol Sci, Escola Super Agr Luiz de Queiroz, Padua Dias 11, BR-13418900 Piracicaba, SP, Brazil

[2] Sao Paulo State Univ, Inst Biosci, Dept Chem & Biochem, BR-18618000 Botucatu, SP, Brazil

来源：

FOOD CHEMISTRY | 2019年 / 286卷

基金：

巴西圣保罗研究基金会;

关键词：

Polyphenols; Polyphenol oxidase; Antioxidant activity; Phenylpropanoid pathway; Betalains; ANTIOXIDANT PROPERTIES; BETANIN; COLOR; ACID; PH;

D O I：

10.1016/j.foodchem.2019.02.040

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

This study investigated the effectiveness of cysteine in conservation of bioactive compounds and the antioxidant capacity of minimally processed red beet. After red beet minimal processing increasing cysteine concentrations were applied, corresponding to control, 2 mM, 4 mM, 8mM and 16 mM. Assay was performed over 15 d to evaluate the polyphenols, betalains, antioxidant capacity and enzymatic activity of polyphenol oxidase (PPO) and phenylalanine ammonia lyase (PAL). Cysteine enhanced the gallic acid, caffeic acid, chlorogenic acid, kaempferol and betalain contents until 6 d of storage. Subsequently, dosages of cysteine above 4mM maintained gallic acid, kaempferol and betalains contents. Cysteine appears to influence the phenylpropanoid pathway, favoring the accumulation of polyphenols and betalains. In red beet, cysteine did not inhibit PPO activity but enhanced PAL activity. Betalains contribute more than phenolics to the antioxidant capacity, and their relationship with cysteine has not been thoroughly elucidated to date.

引用

页码：600 / 607

页数：8

共 35 条

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