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光照驱动和温度调节：春大麦光合作用相关的酚类化合物谱的变化。

Light Drives and Temperature Modulates: Variation of Phenolic Compounds Profile in Relation to Photosynthesis in Spring Barley.

机构信息

Department of Physics, Faculty of Science, University of Ostrava, 710 00 Ostrava, Czech Republic.

Department of Experimental Plant Biology, Faculty of Science, Charles University, 128 00 Prague, Czech Republic.

出版信息

Int J Mol Sci. 2023 Jan 26;24(3):2427. doi: 10.3390/ijms24032427.

DOI:10.3390/ijms24032427
PMID:36768753
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9916737/
Abstract

Accumulation and metabolic profile of phenolic compounds (PheCs; serving as UV-screening pigments and antioxidants) as well as carbon fixation rate (A) and plant growth are sensitive to irradiance and temperature. Since these factors are naturally co-acting in the environment, it is worthy to study the combined effects of these environmental factors to assess their possible physiological consequences. We investigated how low and high irradiance in combination with different temperatures modify the metabolic profile of PheCs and expression of genes involved in the antioxidative enzyme and PheCs biosynthesis, in relation to photosynthetic activity and availability of non-structural carbohydrates (NSC) in spring barley seedlings. High irradiance positively affected A, NSC, PheCs content, and antioxidant activity (AOX). High temperature led to decreased A, NSC, and increased dark respiration, whilst low temperature was accompanied by reduction of UV-A shielding but increase of PheCs content and AOX. Besides that, irradiance and temperature caused changes in the metabolic profile of PheCs, particularly alteration in homoorientin/isovitexin derivatives ratio, possibly related to demands on AOX-based protection. Moreover, we also observed changes in the ratio of sinapoyl-/feruloyl- acylated flavonoids, the function of which is not yet known. The data also strongly suggested that the NSC content may support the PheCs production.

摘要

酚类化合物（PheCs；作为紫外线屏蔽色素和抗氧化剂）的积累和代谢特征，以及碳固定率（A）和植物生长对光照和温度都很敏感。由于这些因素在环境中自然协同作用，因此研究这些环境因素的综合影响来评估它们可能的生理后果是值得的。我们研究了低光照和高光照与不同温度相结合如何改变春大麦幼苗中 PheCs 的代谢特征以及与光合作用和非结构性碳水化合物（NSC）可用性相关的抗氧化酶和 PheCs 生物合成基因的表达。高光照正向影响 A、NSC、PheCs 含量和抗氧化活性（AOX）。高温导致 A、NSC 减少，暗呼吸增加，而低温伴随着 UV-A 屏蔽减少，但 PheCs 含量和 AOX 增加。此外，光照和温度引起了 PheCs 代谢特征的变化，特别是 homoorientin/isovitexin 衍生物比例的改变，这可能与 AOX 保护的需求有关。此外，我们还观察到了 sinapoyl-/feruloyl-酰化类黄酮的比例变化，其功能尚不清楚。这些数据还强烈表明，NSC 含量可能支持 PheCs 的产生。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b551/9916737/2acd5810d7a9/ijms-24-02427-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b551/9916737/f12ad549a4b6/ijms-24-02427-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b551/9916737/deb38ae783b8/ijms-24-02427-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b551/9916737/61f815edc036/ijms-24-02427-g003.jpg
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