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首页> 外文期刊>Genetic Resources and Crop Evolution >Survey of glucosinolate variation in leaves of Brassica rapa crops
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Survey of glucosinolate variation in leaves of Brassica rapa crops

机译：甘蓝型油菜叶片中芥子油苷变化的调查

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摘要

The breakdown products of glucosinolates (gsl) are biologically active secondary metabolites involved in plant defense and human nutrition. We identified and quantified 14 different gsl present in the young leaves of 82 different varieties of Brassica rapa, including the following crops: Chinese cabbage, broccoleto, Pak choi and other leafy vegetables, turnip, sarson and rapeseed. We did not find crop specific gsl, but their quantity varied extensively among varieties and crops, except that the Chinese cabbage accessions tended to have similar gsl profile and amount. Gluconapin, glucobrassicanapin (aliphatic), neoglucobrassicin, glucobrassicin (indolic), and gluconaturtiin (aromatic) are the predominant gsl in most of the varieties surveyed. We also found two gsl not commonly found in B. rapa, 2-methyl-2-propenyl and n-butyl. Their identities were confirmed by HPLC-MS. Most of the Chinese cabbages contain lower amount of aliphatic than indolic gsl, whereas broccoleto, turnip and rapeseed all have much higher aliphatic gsl content than indolic gsl content. The predominant aliphatic gsl in most of the varieties contain 4-carbon side-chains. The lack of significant correlation observed between the conversion of 3- to 4-carbon side-chain gsl and the conversion of 4- to 5-carbon side-chain gsl suggests that these two elongation cycles are probably under the control of two independent genes in B. rapa. The absence of glucoraphanin in all accessions indicates that only functional Brgsl-Alk alleles are present in B. rapa.
机译：芥子油苷（gsl）的分解产物是参与植物防御和人类营养的具有生物活性的次生代谢产物。我们鉴定并量化了82个不同品种的甘蓝型油菜幼叶中存在的14种不同gsl，包括以下农作物：大白菜，西兰花，白菜和其他叶菜类蔬菜，萝卜，sarson和油菜籽。我们没有发现特定作物的gsl，但是其数量在品种和农作物中差异很大，除了大白菜种质倾向于具有相似的gsl谱和数量。在大多数调查的品种中，葡糖苷酸，葡糖葡糖胺（脂肪族），新葡糖苷，吲哚糖苷和葡糖苷酸（芳香族）是主要的gsl。我们还发现了在芥菜中不常见的两种gsl，即2-甲基-2-丙烯基和正丁基。通过HPLC-MS证实其身份。大多数大白菜的脂肪族脂含量均低于吲哚糖脂，而硬花甘蓝，芜菁和油菜籽的脂肪脂含量均高于吲哚糖脂。大多数品种中主要的脂族gsl均含有4碳侧链。在3到4碳侧链gsl的转化与4到5碳侧链gsl的转化之间缺乏明显的相关性，这表明这两个延长周期可能受两个独立基因的控制。 B.拉帕在所有种质中均不存在葡甘露聚糖，表明在B. rapa中仅存在功能性Brgsl-Alk等位基因。

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