Molecular Mechanisms of Rare Tree Species Response to Abiotic Stress

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Response to Abiotic Stress and Climate Change".

Deadline for manuscript submissions: 31 July 2024 | Viewed by 1206

Special Issue Editor


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Guest Editor
School of Forestry, Hainan University, Haikou 570228, China
Interests: tree genetics and breeding

Special Issue Information

Dear Colleagues,

Various abiotic stresses, such as drought, salinity, natural and synthetic chemical substances, and wounding, have deep influences on trees. Plants have evolved with a complex adaptation system to react dynamically to environmental conditions, allowing them to adapt to abiotic stresses at the molecular, cellular, and entire plant levels. Rare trees mostly have narrow distribution and adapt to special abiotic stress environments, resulting in important genetic variances and genes response. Additionally, some rare trees provide important metabolites under abiotic stress, such as agarwood. The understanding of the molecular mechanisms of rare trees in response to abiotic stress has greatly increased with the advances in molecular biology technologies. In this Special Issue, we encourage researchers to submit their work as research papers or review articles in the following areas:

  • Transcriptomics, transcription factors, hormone biosynthesis, and signal transduction in response to abiotic stress in rare trees;
  • Gene and essential metabolic pathways involved in the response to abiotic stress and crosstalk between abiotic stresses’ regulation;
  • Role of ncRNAs and miRNA in rare tree development and stress responses and signaling;
  • Genome, genetic variances, molecular characterization of rare trees (population of rare trees) under abiotic stresses.

Dr. Jinhui Chen
Guest Editor

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Keywords

  • molecular mechanisms
  • rare tree species
  • abiotic stress

Published Papers (1 paper)

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Research

17 pages, 3029 KiB  
Article
Wound-Induced Temporal Reprogramming of Gene Expression during Agarwood Formation in Aquilaria sinensis
by Jieru Xu, Ruyue Du, Yue Wang and Jinhui Chen
Plants 2023, 12(16), 2901; https://0-doi-org.brum.beds.ac.uk/10.3390/plants12162901 - 09 Aug 2023
Cited by 1 | Viewed by 947
Abstract
Agarwood is a resinous heartwood of Aquilaria sinensis that is formed in response to mechanical wounding. However, the transcriptional response of A. sinensis to mechanical wounding during the agarwood formation process is still unclear. Here, three five-year-old A. sinensis trees were mechanically damaged [...] Read more.
Agarwood is a resinous heartwood of Aquilaria sinensis that is formed in response to mechanical wounding. However, the transcriptional response of A. sinensis to mechanical wounding during the agarwood formation process is still unclear. Here, three five-year-old A. sinensis trees were mechanically damaged by a chisel, and time-series transcriptomic analysis of xylem tissues in the treated area (TA) was performed at 15 (TA1), 70 (TA2) and 180 days after treatment (TA3). Samples from untreated areas at the corresponding time points (UA1, UA2, UA3, respectively) were collected as controls. A total of 1862 (TA1 vs. UA1), 961 (TA2 vs. UA2), 1370 (TA3 vs. UA3), 3305 (TA2 vs. TA1), 2625 (TA3 vs. TA1), 2899 (TA3 vs. TA2), 782 (UA2 vs. UA1), 4443 (UA3 vs. UA1) and 4031 (UA3 vs. UA2) genes were differentially expressed (DEGs). Functional enrichment analysis showed that DEGs were significantly enriched for secondary metabolic processes, signal transduction and transcriptional regulation processes. Most of the genes involved in lignin biosynthesis were more abundant in the TA groups, which included phenylalanine ammonia-lyase, 4-coumarate CoA ligase, cinnamate 4-hydroxylase, caffeoyl-CoA O-methyltransferase and cinnamoyl-CoA reductase. DEGs involved in sesquiterpene biosynthesis were also identified. Hydroxymethylglutaryl-CoA synthase, 3-hydroxy-3-methylglutaryl-coenzyme A reductase, phosphomevalonate kinase and terpene synthase genes were significantly increased in the TA groups, promoting sesquiterpene biosynthesis in the wounded xylem tissues. The TF-gene transcriptomic networks suggested that MYB DNA-binding, NAM, WRKY, HLH and AP2 TFs co-expressed with genes related to lignin and sesquiterpene synthesis, indicating their critical regulatory roles in the biosynthesis of these compounds. Overall, our study reveals a dynamic transcriptional response of A. sinensis to mechanical wounding, provides a resource for identifying candidate genes for molecular breeding of agarwood quality, and sheds light on the molecular mechanisms of agarwood formation in A. sinensis. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Rare Tree Species Response to Abiotic Stress)
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