Physiological and Molecular Responses in Enhancing the Quality of Non-Timber Forest Tree Species

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Molecular Biology".

Deadline for manuscript submissions: 31 August 2026 | Viewed by 477

Special Issue Editors

Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
Interests: non-timber forest; quality enhancement; leaf; multi-omics; function validation

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Guest Editor
Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
Interests: non-timber forest; secondary metabolism; evaluation of germplasm resources; physiological response

Special Issue Information

Dear Colleagues,

Non-timber forests, representing critical resources that integrate ecological benefits with economic value, play a pivotal role in ensuring food and oil security, promoting rural revitalization, and achieving carbon neutrality goals. The quality of their products (e.g., fruits, seeds, oils, resins, medicinal materials) directly determines the potential for industrial development and market competitiveness. However, the formation of quality traits in economic forests is a complex quantitative process, co-regulated by genetic background, environmental factors, and cultivation practices. A deep understanding of the underlying physiological–biochemical processes and molecular regulatory networks is the theoretical foundation for precise quality improvement.

This Special Issue aims to compile the latest research advances and cutting-edge reviews in the field, focusing on, although not exclusively, the following topics:

  • Physiological mechanisms: The contribution of physiological processes such as nutrient uptake and allocation, photosynthetic carbon metabolism, and water transport and use efficiency to quality formation; the physiological basis of the impact of abiotic stresses (e.g., drought, salinity, extreme temperatures) on quality.
  • Molecular regulatory networks: Cloning and functional characterization of key genes related to quality (regulating the synthesis and accumulation of oils, proteins, carbohydrates, secondary metabolites); application of multi-omics approaches (e.g., transcriptomics, metabolomics) in quality research.
  • Signal transduction and regulation: The crosstalk and integration mechanisms of hormonal signals (e.g., abscisic acid, jasmonic acid, brassinosteroids) and environmental signals in quality formation.
  • Epigenetics and breeding applications: Regulation of quality traits by epigenetic modifications (e.g., DNA methylation); potential and challenges of modern biotechnologies like marker-assisted selection and gene editing in quality breeding of economic forests.

The findings will help elucidate the genetic essence of quality traits in non-timber forests, providing new strategies, genes, and theoretical support for breeding new varieties with high yield, superior quality, and high stress resistance, collectively promoting the sustainable development of the global non-timber forest industry.

Dr. Jing Guo
Dr. Wanwen Yu
Guest Editors

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Keywords

  • non-timber forest products
  • quality formation
  • physiological regulation
  • molecular mechanisms
  • abiotic stress
  • secondary metabolism
  • multi-omics analysis
  • molecular breeding

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Published Papers (1 paper)

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Research

16 pages, 3500 KB  
Article
Ginkgo biloba DFR2 Gene Remodels the Flavonoid Metabolic Network in Transgenic Nicotiana benthamiana
by Xinru Sun, Cheng Ji, Pengfei Yu, Guibin Wang and Jing Guo
Plants 2026, 15(9), 1331; https://doi.org/10.3390/plants15091331 - 27 Apr 2026
Viewed by 203
Abstract
Dihydroflavonol 4-reductase (DFR) plays a pivotal role in regulating flavonoid and anthocyanin biosynthesis, governing the accumulation of plant secondary metabolites. This study aimed to characterize the DFR gene family in Ginkgo biloba and elucidate the function of the predominant gene GbDFR2 in the [...] Read more.
Dihydroflavonol 4-reductase (DFR) plays a pivotal role in regulating flavonoid and anthocyanin biosynthesis, governing the accumulation of plant secondary metabolites. This study aimed to characterize the DFR gene family in Ginkgo biloba and elucidate the function of the predominant gene GbDFR2 in the flavonoid metabolic network. Through transcriptome analysis, three differentially expressed GbDFR genes were identified. Bioinformatic analysis revealed that all three GbDFR proteins are hydrophilic and acidic and belong to the NADB_Rossmann superfamily. RT-qPCR analysis of different tissues of ginkgo revealed that all three GbDFR genes exhibited the highest expression levels in the leaves. An overexpression vector of GbDFR2 was constructed and stably transformed into Nicotiana benthamiana. Metabolomic and qPCR analyses showed that heterologous GbDFR2 expression significantly remodeled the flavonoid profile, upregulating sakuranetin and 3,7-Di-O-methylquercetin while downregulating narcissin and naringenin chalcone. Additionally, it upregulated endogenous NbCHI and NbDFR, and suppressed the transcription factors NbMYL2b and NbERF4a. These findings suggest that GbDFR2 can act as a regulator of flavonol biosynthesis and provide a candidate gene for the metabolic engineering of flavonoids in woody plants. Full article
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