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小麦不同光环境下的多胺代谢。

Polyamine Metabolism under Different Light Regimes in Wheat.

机构信息

Eötvös Loránd Research Network, Centre for Agricultural Research, 2462 Martonvásár, Hungary.

出版信息

Int J Mol Sci. 2021 Oct 29;22(21):11717. doi: 10.3390/ijms222111717.

DOI:10.3390/ijms222111717
PMID:34769148
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8583935/
Abstract

Although the relationship between polyamines and photosynthesis has been investigated at several levels, the main aim of this experiment was to test light-intensity-dependent influence of polyamine metabolism with or without exogenous polyamines. First, the effect of the duration of the daily illumination, then the effects of different light intensities (50, 250, and 500 μmol m s) on the polyamine metabolism at metabolite and gene expression levels were investigated. In the second experiment, polyamine treatments, namely putrescine, spermidine and spermine, were also applied. The different light quantities induced different changes in the polyamine metabolism. In the leaves, light distinctly induced the putrescine level and reduced the 1,3-diaminopropane content. Leaves and roots responded differently to the polyamine treatments. Polyamines improved photosynthesis under lower light conditions. Exogenous polyamine treatments influenced the polyamine metabolism differently under individual light regimes. The fine-tuning of the synthesis, back-conversion and terminal catabolism could be responsible for the observed different polyamine metabolism-modulating strategies, leading to successful adaptation to different light conditions.

摘要

虽然多胺与光合作用的关系已在多个层面进行了研究，但本实验的主要目的是测试多胺代谢在有或没有外源多胺的情况下对光强的依赖性影响。首先，研究了每日光照时间的长短对代谢物和基因表达水平上多胺代谢的影响，然后研究了不同光强（50、250 和 500 μmol m s）的影响。在第二个实验中，还进行了多胺处理，即腐胺、亚精胺和精胺。不同的光量诱导了多胺代谢的不同变化。在叶片中，光明显诱导腐胺水平升高，并降低 1,3-二氨基丙烷含量。叶片和根对多胺处理的反应不同。多胺在较低光照条件下改善光合作用。外源多胺处理在不同光照条件下对多胺代谢的影响不同。合成、反向转化和末端分解的精细调节可能是导致观察到的不同多胺代谢调节策略的原因，从而成功适应不同的光照条件。

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