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Transcriptional and metabolic profiles of Lolium perenne L. genotypes in response to a PEG-induced water stress

机译:黑麦草基因型对PEG诱导的水分胁迫的转录和代谢谱

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摘要

Metabolic profiling was carried out in the forage grass Lolium perenne L. (perennial ryegrass) to uncover mechanisms involved in the plants response to water stress. When leaf and root materials from two genotypes, with a contrasting water stress response, were analysed by GC–MS, a clear difference in the metabolic profiles of the leaf tissue under water stress was observed. Differences were principally due to a reduction in fatty acid levels in the more susceptible Cashel genotype and an increase in sugars and compatible solutes in the more tolerant PI 462336 genotype. Sugars with a significant increase included: raffinose, trehalose, glucose, fructose and maltose. Increasing the ability of perennial ryegrass to accumulate these sugars in response to a water deficit may lead to more tolerant varieties. The metabolomics approach was combined with a transcriptomics approach in the water stress tolerant genotype PI 462336, which has identified perennial ryegrass genes regulated under water stress.© 2009 The Authors. Journal compilation © 2009 Blackwell Publishing Ltd
机译:在饲草草黑麦草(多年生黑麦草)中进行了代谢分析,以揭示植物对水分胁迫的响应机制。当通过GC-MS分析来自两种基因型的叶片和根部材料(具有相反的水分胁迫响应)时,在水分胁迫下观察到叶片组织的代谢谱存在明显差异。差异的主要原因是,较易感的Cashel基因型中的脂肪酸含量降低,以及较耐受的PI 462336基因型中的糖和相容性溶质增加。显着增加的糖包括:棉子糖,海藻糖,葡萄糖,果糖和麦芽糖。多年生黑麦草因缺水而积累这些糖的能力增强,可能会导致更多的耐性品种。耐水胁迫基因型PI 462336的代谢组学方法与转录组学方法相结合,该基因型已鉴定出受水分胁迫调节的多年生黑麦草基因。©2009作者。期刊编辑©2009 Blackwell Publishing Ltd

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