UMRT INRAE 1158 BioEcoAgro, Laboratoire BIOPI, University of Picardie Jules Verne, 80000 Amiens, France.
CRRBM, University of Picardie Jules Verne, 80000 Amiens, France.
Molecules. 2021 Feb 2;26(3):767. doi: 10.3390/molecules26030767.
Lignans, phenolic plant secondary metabolites, are derived from the phenylpropanoid biosynthetic pathway. Although, being investigated for their health benefits in terms of antioxidant, antitumor, anti-inflammatory and antiviral properties, the role of these molecules in plants remains incompletely elucidated; a potential role in stress response mechanisms has been, however, proposed. In this study, a non-targeted metabolomic analysis of the roots, stems, and leaves of wild-type and PLR1-RNAi transgenic flax, devoid of (+) secoisolariciresinol diglucoside ((+) SDG)-the main flaxseed lignan, was performed using H-NMR and LC-MS, in order to obtain further insight into the involvement of lignan in the response of plant to osmotic stress. Results showed that wild-type and lignan-deficient flax plants have different metabolic responses after being exposed to osmotic stress conditions, but they both showed the capacity to induce an adaptive response to osmotic stress. These findings suggest the indirect involvement of lignans in osmotic stress response.
木脂素是苯丙素生物合成途径衍生的酚类植物次生代谢物。尽管木脂素因其具有抗氧化、抗肿瘤、抗炎和抗病毒特性而被广泛研究，但这些分子在植物中的作用仍不完全清楚；然而，有人提出它们在应激反应机制中可能具有作用。在这项研究中，使用 H-NMR 和 LC-MS 对野生型和 PLR1-RNAi 转基因亚麻（缺乏主要的亚麻籽木脂素 (+) 松脂素二葡萄糖苷 ((+) SDG）的根、茎和叶进行了非靶向代谢组学分析，以便更深入地了解木脂素在植物对渗透胁迫的反应中的作用。结果表明，在暴露于渗透胁迫条件下，野生型和木质素缺乏型亚麻植物具有不同的代谢反应，但它们都表现出诱导对渗透胁迫适应的能力。这些发现表明木脂素间接参与了渗透胁迫反应。
