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首页> 美国卫生研究院文献>Biomolecules >Combining Physiological and Metabolomic Analysis to Unravel the Regulations of Coronatine Alleviating Water Stress in Tobacco (Nicotiana tabacum L.)
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Combining Physiological and Metabolomic Analysis to Unravel the Regulations of Coronatine Alleviating Water Stress in Tobacco (Nicotiana tabacum L.)

机译：结合生理和代谢组学分析来阐明日冕碱缓解烟草水分胁迫的法规

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摘要

Drought is a major abiotic stress that restricts plants growth, development, and yield. Coronatine (COR), a mimic of JA-Ile, functions in plant tolerance to multiple stresses. In our study, we examined the effects of COR in tobacco under polyethylene glycol (PEG) stress. COR treatment improved plant growth under stress as measured by fresh weight (FW) and dry weight (DW). The enzyme activity assay indicated that, under osmotic stress conditions, the activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) were enhanced by COR treatment. Histochemical analyses via nitrotetrazolium blue chloride (NBT) and 3,3′-diaminobenzidine (DAB) staining showed that COR reduced reactive oxygen species (ROS) accumulation during osmotic stress. Metabolite profiles revealed that COR triggered significant metabolic changes in tobacco leaves under osmotic stress, and many essential metabolites, such as sugar and sugar derivatives, organic acids, and nitrogen-containing compounds, which might play active roles in osmotic-stressed tobacco plants, were markedly accumulated in the COR-treated tobacco. The work presented here provides a comprehensive understanding of the COR-mediated physiological, biochemical, and metabolic adjustments that minimize the adverse impact of osmotic stress on tobacco.
机译：干旱是限制植物生长，发育和产量的主要非生物胁迫。 Coronatine（COR）是JA-Ile的模拟物，在植物对多种胁迫的耐受性中发挥作用。在我们的研究中，我们研究了聚乙二醇（PEG）胁迫下COR对烟草的影响。以鲜重（FW）和干重（DW）衡量，COR处理改善了植物在胁迫下的生长。酶活性测定表明，在渗透胁迫条件下，COR处理可提高超氧化物歧化酶（SOD），过氧化氢酶（CAT），抗坏血酸过氧化物酶（APX）和谷胱甘肽还原酶（GR）的活性。通过氯化硝基四氮唑蓝（NBT）和3,3'-二氨基联苯胺（DAB）染色的组织化学分析表明，COR减少了渗透胁迫期间的活性氧（ROS）积累。代谢物特征表明，COR在渗透胁迫下触发了烟叶的显着代谢变化，并且许多重要的代谢物（如糖和糖衍生物，有机酸和含氮化合物）可能在渗透胁迫的烟草植物中发挥积极作用。在经过COR处理的烟草中明显积累。此处介绍的工作提供了对COR介导的生理，生化和代谢调节的全面理解，可最大程度地减少渗透压对烟草的不利影响。

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