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High nitrogen inhibits biomass and saponins accumulation in a medicinal plant Panax notoginseng

Nitrogen (N) is an important macronutrient and is comprehensively involved in the synthesis of secondary metabolites. However, the interaction between N supply and crop yield and the accumulation of effective constituents in an N-sensitive medicinal plant Panax notoginseng (Burkill) F. H. Chen is no...

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Autores principales: Cun, Zhu, Wu, Hong-Min, Zhang, Jin-Yan, Shuang, Sheng-Pu, Hong, Jie, An, Tong-Xin, Chen, Jun-Wen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9951802/
https://www.ncbi.nlm.nih.gov/pubmed/36846464
http://dx.doi.org/10.7717/peerj.14933
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author Cun, Zhu
Wu, Hong-Min
Zhang, Jin-Yan
Shuang, Sheng-Pu
Hong, Jie
An, Tong-Xin
Chen, Jun-Wen
author_facet Cun, Zhu
Wu, Hong-Min
Zhang, Jin-Yan
Shuang, Sheng-Pu
Hong, Jie
An, Tong-Xin
Chen, Jun-Wen
author_sort Cun, Zhu
collection PubMed
description Nitrogen (N) is an important macronutrient and is comprehensively involved in the synthesis of secondary metabolites. However, the interaction between N supply and crop yield and the accumulation of effective constituents in an N-sensitive medicinal plant Panax notoginseng (Burkill) F. H. Chen is not completely known. Morphological traits, N use and allocation, photosynthetic capacity and saponins accumulation were evaluated in two- and three-year-old P. notoginseng grown under different N regimes. The number and length of fibrous root, total root length and root volume were reduced with the increase of N supply. The accumulation of leaf and stem biomass (above-ground) were enhanced with increasing N supply, and LN-grown plants had the lowest root biomass. Above-ground biomass was closely correlated with N content, and the relationship between root biomass and N content was negatives in P. notoginseng (r = −0.92). N use efficiency-related parameters, NUE (N use efficiency, etc.), N(C) (N content in carboxylation system component) and P(n) (the net photosynthetic rate) were reduced in HN-grown P. notoginseng. SLN (specific leaf N), Chl (chlorophyll), N(L) (N content in light capture component) increased with an increase in N application. Interestingly, root biomass was positively correlated with NUE, yield and P(n). Above-ground biomass was close negatively correlated with photosynthetic N use efficiency (PNUE). Saponins content was positively correlated with NUE and P(n). Additionally, HN improved the root yield of per plant compared with LN, but reduced the accumulation of saponins, and the lowest yield of saponins per unit area (35.71 kg·hm(−2)) was recorded in HN-grown plants. HN-grown medicinal plants could inhibit the accumulation of root biomass by reducing N use and photosynthetic capacity, and HN-induced decrease in the accumulation of saponins (C-containing metabolites) might be closely related to the decline in N efficiency and photosynthetic capacity. Overall, N excess reduces the yield of root and C-containing secondary metabolites (active ingredient) in N-sensitive medicinal species such as P. notoginseng.
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spelling pubmed-99518022023-02-25 High nitrogen inhibits biomass and saponins accumulation in a medicinal plant Panax notoginseng Cun, Zhu Wu, Hong-Min Zhang, Jin-Yan Shuang, Sheng-Pu Hong, Jie An, Tong-Xin Chen, Jun-Wen PeerJ Agricultural Science Nitrogen (N) is an important macronutrient and is comprehensively involved in the synthesis of secondary metabolites. However, the interaction between N supply and crop yield and the accumulation of effective constituents in an N-sensitive medicinal plant Panax notoginseng (Burkill) F. H. Chen is not completely known. Morphological traits, N use and allocation, photosynthetic capacity and saponins accumulation were evaluated in two- and three-year-old P. notoginseng grown under different N regimes. The number and length of fibrous root, total root length and root volume were reduced with the increase of N supply. The accumulation of leaf and stem biomass (above-ground) were enhanced with increasing N supply, and LN-grown plants had the lowest root biomass. Above-ground biomass was closely correlated with N content, and the relationship between root biomass and N content was negatives in P. notoginseng (r = −0.92). N use efficiency-related parameters, NUE (N use efficiency, etc.), N(C) (N content in carboxylation system component) and P(n) (the net photosynthetic rate) were reduced in HN-grown P. notoginseng. SLN (specific leaf N), Chl (chlorophyll), N(L) (N content in light capture component) increased with an increase in N application. Interestingly, root biomass was positively correlated with NUE, yield and P(n). Above-ground biomass was close negatively correlated with photosynthetic N use efficiency (PNUE). Saponins content was positively correlated with NUE and P(n). Additionally, HN improved the root yield of per plant compared with LN, but reduced the accumulation of saponins, and the lowest yield of saponins per unit area (35.71 kg·hm(−2)) was recorded in HN-grown plants. HN-grown medicinal plants could inhibit the accumulation of root biomass by reducing N use and photosynthetic capacity, and HN-induced decrease in the accumulation of saponins (C-containing metabolites) might be closely related to the decline in N efficiency and photosynthetic capacity. Overall, N excess reduces the yield of root and C-containing secondary metabolites (active ingredient) in N-sensitive medicinal species such as P. notoginseng. PeerJ Inc. 2023-02-21 /pmc/articles/PMC9951802/ /pubmed/36846464 http://dx.doi.org/10.7717/peerj.14933 Text en © 2023 Cun et al. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Agricultural Science
Cun, Zhu
Wu, Hong-Min
Zhang, Jin-Yan
Shuang, Sheng-Pu
Hong, Jie
An, Tong-Xin
Chen, Jun-Wen
High nitrogen inhibits biomass and saponins accumulation in a medicinal plant Panax notoginseng
title High nitrogen inhibits biomass and saponins accumulation in a medicinal plant Panax notoginseng
title_full High nitrogen inhibits biomass and saponins accumulation in a medicinal plant Panax notoginseng
title_fullStr High nitrogen inhibits biomass and saponins accumulation in a medicinal plant Panax notoginseng
title_full_unstemmed High nitrogen inhibits biomass and saponins accumulation in a medicinal plant Panax notoginseng
title_short High nitrogen inhibits biomass and saponins accumulation in a medicinal plant Panax notoginseng
title_sort high nitrogen inhibits biomass and saponins accumulation in a medicinal plant panax notoginseng
topic Agricultural Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9951802/
https://www.ncbi.nlm.nih.gov/pubmed/36846464
http://dx.doi.org/10.7717/peerj.14933
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