Moderate shading elicits succinic acid accumulation aligning with simultaneous expression of genes involved in TCA cycle and photosynthetic pathway in a medicinal plant Pinellia ternata
Copyright © 2025 Elsevier Masson SAS. All rights reserved.
| Publié dans: | Plant physiology and biochemistry : PPB. - 1991. - 224(2025) vom: 08. Apr., Seite 109911 |
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| Auteur principal: | |
| Autres auteurs: | , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2025
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| Accès à la collection: | Plant physiology and biochemistry : PPB |
| Sujets: | Journal Article HY5-Mediated regulation Photosynthetic plasticity Pinellia ternata Shade acclimation Succinic acid biosynthesis |
| Résumé: | Copyright © 2025 Elsevier Masson SAS. All rights reserved. Photosynthesis plays a critical role in plant growth and development, with light intensity being a primary factor in optimizing photosynthetic efficiency and the biosynthesis of secondary metabolites. Succinic acid, an active ingredient in the medicinal plant Pinellia ternata with analgesic effects, exhibits light-dependent accumulation patterns, potentially regulated by the HY5 transcription factor through photosynthetic-TCA cycle crosstalk. Comparative analyses of photosynthetic capacity, succinic acid content, and gene expression under full light (100 %FL) and shaded conditions (55 %FL) revealed that 55 %FL enhanced chlorophyll content by 873.74 μg g-2 and photosynthetic rates by 33 %, accompanied by HY5-mediated upregulation of light-harvesting genes. Improved leaf area and mesophyll structure under shading facilitated light absorption and CO2 diffusion, whereas 100 %FL suppressed photosynthetic genes and electron transport, reducing succinic acid content by 27 %. Transcriptomic profiling identified light intensity-dependent metabolic shifts, with HY5-associated downregulation of TCA cycle genes (SDH1-1/SDH2-1) correlating negatively with succinic acid accumulation. These findings demonstrate that moderate shading promotes growth and bioactive compound synthesis in P. ternata through HY5-coordinated optimization of photosynthetic and respiratory pathways. This study highlights the potential of leveraging HY5-driven light signaling in agricultural practices to enhance medicinal plant quality, offering precision strategies for cultivation optimization through targeted light regulation |
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| Description: | Date Revised 16.04.2025 published: Print-Electronic Citation Status Publisher |
| ISSN: | 1873-2690 |
| DOI: | 10.1016/j.plaphy.2025.109911 |