The abundance of certain metabolites responds to drought stress in the highly drought tolerant plant Caragana korshinskii
The abundance of certain metabolites responds to drought stress in the highly drought tolerant plant Caragana korshinskii
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DOI：
10.1007/s11738-017-2412-y
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发表时间：
2017-04
影响因子：
2.6
通讯作者：
Jiwei Zhang;Guoxiong Chen;P. Zhao;Qin Zhou;Xin Zhao
中科院分区：
文献类型：
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作者：
Jiwei Zhang;Guoxiong Chen;P. Zhao;Qin Zhou;Xin Zhao
代谢组学为研究生物体对遗传和/或环境变化的系统反应提供了机会。在这里，干旱胁迫的代谢后果在高度耐旱的植物柠条中得到了表征。所采用的飞行时间质谱平台在遭受干旱胁迫或浇水良好的植物的叶、茎、根颈和根的提取物中鉴定出了数百种代谢物。这四个器官中的每一个都含有许多干旱反应的潜在代谢标志物。压力导致四个器官中各种小碳水化合物和可溶性氨基酸的丰度增加；这些化合物可以充当相容的溶质或抗氧化剂。在整个植物中，几种三羧酸循环和糖酵解中间体以及氨基酸谷氨酸和天冬氨酸的含量下降。通路分析表明大多数潜在的代谢标志物涉及能量代谢和氨基酸代谢。这意味着能量代谢和光合作用在 C 的适应过程中受到损害。 korshinskiito 干旱胁迫。鉴于四个器官中与干旱反应相关的代谢物谱不同，得出的结论是每个器官采用不同的策略来应对干旱胁迫。
Metabolomics offers opportunities for studying the systematic response of an organism to a genetic and/or an environmental change. Here, the metabolic consequences of drought stress were characterized in the highly drought tolerant plantCaragana korshinskii.The time-of-flight mass spectrometry platform employed identified several hundred metabolites in extracts of the leaf, stem, root collar, and root of plants which had been either subjected to drought stress or were well-watered. Each of the four organs harbored a number of potential metabolite markers for the drought response. An increased abundance of various small carbohydrates and soluble amino acids in each of the four organs was induced by the stress; these compounds may act as compatible solutes or antioxidants. Across the whole plant, there was a fall in the content of several Krebs cycle and glycolysis intermediates, as well as in that of the amino acids glutamic acid and aspartic acid. Pathway analysis suggested that most of the potential metabolite markers were involved in energy metabolism and amino-acid metabolism. The implication was that energy metabolism and photosynthesis are compromised during the adaptation ofC. korshinskiito drought stress. Given the different spectrum of metabolites associated with the drought response in the four organs, it was concluded that each organ employs a distinct strategy to cope with drought stress.