Genetic and Genomic Perspective to Understand Drought Response in Forest Trees

A special issue of Forests (ISSN 1999-4907). This special issue belongs to the section "Genetics and Molecular Biology".

Deadline for manuscript submissions: closed (25 August 2023) | Viewed by 2870

Special Issue Editor


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Guest Editor
1. Canada Research Chair for Forest Genomics, Institute for Systems and Integrative Biology, Université Laval, Quebec City, QC, Canada
2. Forest Research Center, Département des Sciences du Bois et de la Forêt, Université Laval, Quebec City, QC, Canada
Interests: population genomics; plant ecophysiology; genetics and genomics; forest resilience; conifers; tree-ring phenotypes

Special Issue Information

Dear Colleagues,

The increase in frequency and intensity of drought stress induced by climate change represents a serious risk to forest health and ecosystem services. Intraspecific genetic variation is expected to play an important role in (1) determining the adaptive capacity of tree populations in the face of rapid climate change, (2) enabling the integration of drought-related traits into tree breeding and (3) supporting assisted climate-based seed transfer. Knowledge of local adaptation, genetic diversity, and genetic control of drought-related traits is crucial to better predict the vulnerability and resilience of tree populations to future climatic conditions. Increasingly, genomic approaches are being used to study such adaptations of wild populations or populations from common garden field trials.

With this Special Issue of the journal Forests, special attention will be given to the genetic influence of drought response and resilience of tree species. Common garden studies, gene expression/transcriptome studies, as well as studies using quantitative trait locus (QTL), genome scan, and genotype association approaches will be considered for publication.

Dr. Claire Depardieu
Guest Editor

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Published Papers (1 paper)

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Research

15 pages, 3380 KiB  
Article
Transcriptome Analysis of Pecan (Carya illinoinensis) Differentially Expressed Genes in Response to Drought Stress
by Kaikai Zhu, Lu Wei, Wenjuan Ma, Xiaoli Hu, Juan Zhao, Pengpeng Tan, Hui Liu, Gang Feng, Pinghua Fan and Fangren Peng
Forests 2023, 14(3), 608; https://doi.org/10.3390/f14030608 - 18 Mar 2023
Cited by 1 | Viewed by 2525
Abstract
Pecan (Carya illinoinensis) is an economically important nut tree that is greatly affected by drought, limiting its production and distribution. Although the complete genome of the pecan was published several years ago, the molecular basis of the pecan’s response to drought [...] Read more.
Pecan (Carya illinoinensis) is an economically important nut tree that is greatly affected by drought, limiting its production and distribution. Although the complete genome of the pecan was published several years ago, the molecular basis of the pecan’s response to drought remains unclear. In this study, we analyzed the high-throughput transcriptome data for pecans under 3, 6, 9, 12, and 15 days of drought stress compared with the controls. A total of 12,893 differentially expressed genes (DEGs) were identified under drought stress, with 11,684 of them showing significant changes after 15 d of drought treatment. Among these, 4448 genes were up-regulated while 7226 were down-regulated. The trend analysis revealed that DEGs could be classified into 20 clusters. Surprisingly, the majority of genes (6148) showed a gradual down-regulation, and 3683 genes showed a gradual up-regulation in response to drought. Gene ontology enrichment analysis showed that the DEGs were mainly enriched in biological processes. The KEGG pathway enrichment results indicated that the DEGs were mainly enriched in several pathways, including metabolic pathways, the biosynthesis of secondary metabolites, and plant hormone signal transduction processes. Among the DEGs, 457 protein kinase and 734 transcription factor genes were shown to be drought-responsive and may play key roles in the response to drought, and the expression patterns of selected candidate genes were further validated using quantitative real-time PCR. Collectively, these findings highlighted the multiple processes in pecans under drought stress and provided valuable insights into the further investigation of the functions of drought stress-responsive genes and the molecular basis of the pecan drought stress response. Full article
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