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首页> 外文期刊>Plant Physiology and Biochemistry >Mobilization of storage materials during light-induced germination of tomato (Solanum lycopersicum) seeds
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Mobilization of storage materials during light-induced germination of tomato (Solanum lycopersicum) seeds

机译：番茄种子（Solanum lycopersicum）种子光诱导萌发过程中的储藏材料动员

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The aim of this study was to analyze the metabolism of storage materials in germinating tomato (Solanum lycopersicum) seeds and to determine whether it is regulated by light via phytochromes. Wild type, single and multiple phytochrome A, B1 and B2 mutants were investigated. Imbibed seeds were briefly irradiated with far-red or far-red followed by red light, and germinated in darkness. Triacylglycerols and starch were quantified using biochemical assays in germinating seeds and seedlings during the first 5 days of growth. To investigate the process of fat-carbohydrate transformation, the activity of the glyoxylate cycle was assessed. Our results confirm the role of phytochrome in the control of tomato seed germination. Phytochromes A and B2 were shown to play specific roles, acting antagonistically in far-red light. While the breakdown of triacylglycerols proceeded independently of light, phytochrome control was visible in the next stages of the lipid-carbohydrate transformation. The key enzymes of the glyoxylate cycle, isocitrate lyase and malate synthase, were regulated by phytochrome(s). This was reflected in a greater increase of starch content during seedling growth in response to additional red light treatment. This study is the first attempt to build a comprehensive image of storage material metabolism regulation by light in germinating dicotyledonous seeds. (C) 2016 Elsevier Masson SAS. All rights reserved.
机译：这项研究的目的是分析发芽的番茄种子（番茄种子）中储存材料的代谢，并确定其是否受光通过植物色素的调节。研究了野生型，单个和多个植物色素A，B1和B2突变体。吸收的种子用远红或远红短暂照射，然后发出红光，然后在黑暗中发芽。在生长的前5天，使用生化分析对发芽的种子和幼苗中的三酰甘油和淀粉进行定量。为了研究脂肪-碳水化合物转化的过程，评估了乙醛酸循环的活性。我们的结果证实了植物色素在控制番茄种子发芽中的作用。已证明植物色素A和B2发挥特定作用，在远红光下具有拮抗作用。尽管三酰基甘油的分解独立于光而进行，但在脂质-碳水化合物转化的下一阶段中可见到植物色素的控制。乙醛酸循环的关键酶，异柠檬酸裂合酶和苹果酸合酶，受植物色素的调节。这反映为响应额外的红光处理，幼苗生长期间淀粉含量的更大增加。这项研究是首次尝试通过光在萌发的双子叶植物种子中建立存储物质代谢调控的综合图像。 （C）2016 Elsevier Masson SAS。版权所有。

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