The effects of nitrogen application on the growth, photosynthesis, and antioxidant activity of Amaranthus viridis.

IF 2.1 4区 生物学 Q2 PLANT SCIENCES Photosynthetica Pub Date : 2022-08-16 eCollection Date: 2022-01-01 DOI:10.32615/ps.2022.034
C-C Chen, M-Y Huang, K-H Lin, M-T Hsueh
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Abstract

Amaranthus viridis is a functional food due to its antioxidant activity. The aim of this study was to investigate the responses of photosynthesis, growth, and antioxidant properties in A. viridis to nitrogen (N) applications. A. viridis plants were cultivated under low N (LN), medium N (MN), and high N (HN), and harvested at the reproductive phase. The dry mass and plant height of A. viridis plants increased with elevated N, and the dry mass of HN was saturated. Net photosynthetic rate, stomatal conductance, and water-use efficiency in the leaves at HN were strengthened. Meanwhile, under HN, chlorophylls (Chl), their precursors, and degradation intermediates in the leaves were highly accumulated, and the minor route of Chl degradation pathway was induced dramatically. However, 2,2-diphenyl-1-picrylhydrazyl radical-scavenging, ferrous iron-chelating, and reducing power in the extracts were reduced under HN. Conclusively, an appropriate N application balanced the yield and antioxidant properties of A. viridis.

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施氮对绿苋菜生长、光合作用及抗氧化活性的影响。
苋菜具有抗氧化活性,是一种功能性食品。本研究旨在研究绿草的光合作用、生长和抗氧化特性对氮素(N)施用的响应。在低氮(LN)、中氮(MN)和高氮(HN)条件下栽培绿草,并在繁殖期收获。绿豆植株干质量和株高随着N的增加而增加,HN的干质量达到饱和状态。叶片净光合速率、气孔导度和水分利用效率提高。同时,在高温胁迫下,叶绿素及其前体和降解中间体在叶片中大量积累,Chl降解途径的次要途径被显著诱导。但对2,2-二苯基-1-苦味酰肼自由基的清除能力、铁螯合能力和还原能力在HN作用下均有所降低。综上所述,适当的施氮量平衡了绿草的产量和抗氧化性能。
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来源期刊
Photosynthetica
Photosynthetica 生物-植物科学
CiteScore
5.60
自引率
7.40%
发文量
55
审稿时长
3.8 months
期刊介绍: Photosynthetica publishes original scientific papers and brief communications, reviews on specialized topics, book reviews and announcements and reports covering wide range of photosynthesis research or research including photosynthetic parameters of both experimental and theoretical nature and dealing with physiology, biophysics, biochemistry, molecular biology on one side and leaf optics, stress physiology and ecology of photosynthesis on the other side. The language of journal is English (British or American). Papers should not be published or under consideration for publication elsewhere.
期刊最新文献
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