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首页> 外文期刊>Frontiers in Plant Science >Flowering Locus C (FLC) Is a Potential Major Regulator of Glucosinolate Content across Developmental Stages of Aethionema arabicum (Brassicaceae)
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Flowering Locus C (FLC) Is a Potential Major Regulator of Glucosinolate Content across Developmental Stages of Aethionema arabicum (Brassicaceae)

机译：<斜视>开花基因座C（FLC）是<斜视> Alethionema Arabicum （Brassicaceae）的发育阶段的葡萄糖酸盐含量的潜在主要调节因子

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The biochemical defense of plants can change during their life-cycle and impact herbivore feeding and plant fitness. The annual species Aethionema arabicum is part of the sister clade to all other Brassicaceae. Hence, it holds a phylogenetically important position for studying crucifer trait evolution. Glucosinolates (GS) are essentially Brassicales-specific metabolites involved in plant defense. Using two Ae. arabicum accessions (TUR and CYP) we identify substantial differences in glucosinolate profiles and quantities between lines, tissues and developmental stages. We find tissue specific side-chain modifications in aliphatic GS: methylthioalkyl in leaves, methylsulfinylalkyl in fruits, and methylsulfonylalkyl in seeds. We also find large differences in absolute glucosinolate content between the two accessions (up to 10-fold in fruits) that suggest a regulatory factor is involved that is not part of the quintessential glucosinolate biosynthetic pathway. Consistent with this hypothesis, we identified a single major multi-trait quantitative trait locus controlling total GS concentration across tissues in a recombinant inbred line population derived from TUR and CYP. With fine-mapping, we narrowed the interval to a 58 kb region containing 15 genes, but lacking any known GS biosynthetic genes. The interval contains homologs of both the sulfate transporter SULTR2;1 and FLOWERING LOCUS C . Both loci have diverse functions controlling plant physiological and developmental processes and thus are potential candidates regulating glucosinolate variation across the life-cycle of Aethionema . Future work will investigate changes in gene expression of the candidates genes, the effects of GS variation on insect herbivores and the trade-offs between defense and reproduction.
机译：植物的生化防御在其生命周期中可以改变，并影响食草动物喂养和植物健身。年度艾司匹米阿拉伯人是姐姐思考的一部分，所有其他芸苔属。因此，它具有用于研究十字花属特征进化的系统血症的重要位置。硫代葡萄糖苷（GS）基本上是植物防御中的特异性特异性代谢物。使用两个ae。 Arabicum Rescessions（TUR和CYP）我们鉴定了葡糖苷植物的差异和线，组织和发育阶段之间的数量。我们在脂族GS中发现组织特异性侧链修饰：叶片中的甲硫基，水果中的甲基磺基烷基，以及种子中的甲基磺酰烷基。我们还发现两种进度（果实中最多10倍）之间的绝对葡糖苷含量的大差异，表明涉及调节因子，这不是典型葡萄糖苷生物合成途径的一部分。与该假设一致，我们鉴定了在来自TUR和CYP的重组近交系群体中跨组织的单个主要多种定量性状基因座。通过细映射，我们将间隔缩小到含有15个基因的58 kB区域，但缺乏任何已知的GS生物合成基因。间隔含有硫酸盐转运蛋白巯2; 1和开花基因座C的同源物。两个基因座都具有不同的功能控制植物生理和发育过程，因此是调节胰岛血液生命周期的葡萄糖酸盐变异的潜在候选者。未来的工作将研究候选基因的基因表达的变化，GS变异对昆虫草食物的影响以及防御与繁殖之间的权衡。

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