Biochemical Pathway of Benzyl Nitrile Derived from L-Phenylalanine in Tea (Camellia sinensis) and Its Formation in Response to Postharvest Stresses

Liao Yinyin; Zeng Lanting; Tan Haibo; Cheng Sihua; Dong Fang; Yang Ziyin

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Biochemical Pathway of Benzyl Nitrile Derived from L-Phenylalanine in Tea (Camellia sinensis) and Its Formation in Response to Postharvest Stresses

机译：衍生自茶（Camellia Sinensis）的L-苯丙氨酸的苄基丁腈的生化途径及其响应于去除率应力的形成

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Volatiles affect tea (Camellia sinensis) aroma quality and have roles in tea plant defense against stresses. Some volatiles defend against stresses through their toxicity, which might affect tea safety. Benzyl nitrile is a defense-related toxic volatile compound that accumulates in tea under stresses, but its formation mechanism in tea remains unknown. In this study, L-[H-2(8)]phenylalanine feeding experiments and enzyme reactions showed that benzyl nitrile was generated from L-phenylalanine via phenylacetaldoxime in tea. CsCYP79D73 showed activity for converting L-phenylalanine into phenylacetaldoxime, while CsCYP71AT96s showed activity for converting phenylacetaldoxime into benzyl nitrile. Continuous wounding in the oolong tea process significantly enhanced the CsCYP79D73 expression level and phenylacetaldoxime and benzyl nitrile contents. Benzyl nitrile accumulation under continuous wounding stress was attributed to an increase in jasmonic acid, which activated CsCYP79D73 expression. This represents the first elucidation of the formation mechanism of benzyl nitrile in tea.

机译：挥发影响茶（茶树）的香气质量，在对抗应激茶树的防御作用。一些挥发物抵御通过其毒性的压力，这可能会影响茶叶的安全性。苯腈是与防务相关的有毒挥发性化合物，在逆境条件下的茶，但茶及其形成机制积聚仍是未知。在这项研究中，L-H-2（8）]苯丙氨酸喂养实验和酶反应表明通过在茶phenylacetaldoxime从L-苯丙氨酸生成的苄腈。 CsCYP79D73显示活性为L-苯丙氨酸转化为phenylacetaldoxime，而CsCYP71AT96s显示活性转换成phenylacetaldoxime苄腈。在乌龙茶过程连续伤人显著增强CsCYP79D73表达水平和phenylacetaldoxime和苄腈的内容。连续伤人应力下苄腈累积归因于增加茉莉酸，其活化CsCYP79D73表达。这代表苄腈的茶叶中的形成机构的第一澄清。

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来源
《Journal of Agricultural and Food Chemistry》 |2020年第5期|共8页
作者
Liao Yinyin; Zeng Lanting; Tan Haibo; Cheng Sihua; Dong Fang; Yang Ziyin;
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作者单位

Chinese Acad Sci South China Bot Garden Guangdong Prov Key Lab Appl Bot Guangzhou 510650 Peoples R China;

Chinese Acad Sci South China Bot Garden Guangdong Prov Key Lab Appl Bot Guangzhou 510650 Peoples R China;

Chinese Acad Sci South China Bot Garden Guangdong Prov Key Lab Appl Bot Guangzhou 510650 Peoples R China;

Chinese Acad Sci South China Bot Garden Guangdong Prov Key Lab Appl Bot Guangzhou 510650 Peoples R China;

Guangdong Food &

Drug Vocat Coll Guangzhou 510520 Peoples R China;

Chinese Acad Sci South China Bot Garden Guangdong Prov Key Lab Appl Bot Guangzhou 510650 Peoples R China;

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正文语种 eng
中图分类营养卫生、食品卫生;农业科学;
关键词
aroma; benzyl nitrile; Camellia sinensis; phenylacetaldoxime; tea; volatile;

机译：香气;苄基腈;山茶花;苯丙酮肟;茶;挥发性;

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专利

1. Biochemical Pathway of Benzyl Nitrile Derived from L-Phenylalanine in Tea (Camellia sinensis) and Its Formation in Response to Postharvest Stresses [J] . Liao Yinyin, Zeng Lanting, Tan Haibo, Journal of Agricultural and Food Chemistry . 2020,第5期

机译：衍生自茶（Camellia Sinensis）的L-苯丙氨酸的苄基丁腈的生化途径及其响应于去除率应力的形成
2. An alternative pathway for the formation of aromatic aroma compounds derived from L-phenylalanine via phenylpyruvic acid in tea (Camellia sinensis (L.) O. Kuntze) leaves [J] . Wang Xiaoqin, Zeng Lanting, Liao Yinyin, Food Chemistry . 2019,第JANa1期

机译：通过茶中的苯丙酮酸形成L-苯丙氨酸衍生的芳香族香气化合物的另一途径。（Camellia sinensis（L.）O.Kuntze）
3. Study of the biochemical formation pathway of aroma compound 1-phenylethanol in tea (Camellia sinensis (L.) O. Kuntze) flowers and other plants [J] . Zhou Ying, Peng Qiyuan, Zeng Lanting, Food Chemistry . 2018,第AUGa30期

机译：茶（Camellia sinensis（L.）O. Kuntze）花卉及其他植物中香气化合物1-苯乙醇的生化形成途径研究
4. Organogenesis Responses of Tea (Camellia sinensis (L.) O. Kuntze) var. assamica and sinensis [C] . Hani Widhianata, Taryono International Conference on Bioinformatics, Biotechnology, and Biomedical Engineering . 2019

机译：茶的子组织应答（山茶花Sinensis（L.）O. Kuntze）var。 assamica和sinensis.
5. The differential pro-oxidant effects of the tea (Camellia sinensis) catechin, (-)-epigallocatechin-3-gallate (EGCG), in the context of oral cancer. [D] . Tao, Ling. 2015

机译：在口腔癌的情况下，茶（茶树）儿茶素，（-）-表没食子儿茶素-3-没食子酸酯（EGCG）的差异促氧化作用。
6. Influence of Chloroplast Defects on Formation of Jasmonic Acid and Characteristic Aroma Compounds in Tea (Camellia sinensis) Leaves Exposed to Postharvest Stresses [O] . Jianlong Li, Lanting Zeng, Yinyin Liao, 2019

机译：叶绿体缺陷对采后胁迫下茶树茉莉酸形成及香气特征化合物的影响
7. Biochemical Pathway of Benzyl Nitrile Derived from lPhenylalanine in Tea (Camellia sinensis) and Its Formation in Response to Postharvest Stresses [O] . -1

机译：衍生自茶叶（Camellia Sinensis）的苄基丁腈的生化途径及其响应于去除率应力的形成

Biochemical Pathway of Benzyl Nitrile Derived from L-Phenylalanine in Tea (Camellia sinensis) and Its Formation in Response to Postharvest Stresses

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