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Advances in Tea Tree Genetics and Breeding: 2nd Edition
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Advances in Tea Tree Genetics and Breeding: 2nd Edition

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: 31 January 2025 | Viewed by 2519

Special Issue Editors

Prof. Dr. Mingzhe Yao

E-Mail Website
Guest Editor
Tea Research Institute Chinese Academy of Agricultural Sciences (TRICAAS), Hangzhou 310008, China
Interests: screening and utilization of elite tea germplasm; gene identification for tea quality; breeding of tea plant (Camellia sinensis)
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Kang Wei

E-Mail Website
Guest Editor
Tea Research Institute Chinese Academy of Agricultural Sciences (TRICAAS), Hangzhou 310008, China
Interests: breeding technology development and exploration of secondary mechanism in tea plants
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With the publication of high-quality reference sequences of tea plants and re-sequencing data from various tea accessions, significant advances in tea plant research have been observed in recent years; these developments include secondary metabolism to genetic mechanism exploration, the identification of certain bioactive compounds, and the location of novel genes related to key traits, all of which have extended our understanding of tea genetics and breeding. Among them, changes in the phenotype of special tea varieties, such as their flavonoids, amino acids, caffeine, appearance, and response to environmental factors, have attracted the attention of both customers and scientists. These changing phenotypes are closely associated with key genes that remain largely unknown. Exploring these genes and understanding their underlying mechanisms will enhance tea breeding in the future.

This Special Issue of the International Journal of Molecular Sciences will address the exploration of new genes and their potential molecular mechanisms, such as changes in tea quality, fertility, agronomy traits, and stress responses. Research papers related to tea propagation and new technologies in tea breeding, in addition to relative review papers, are welcome.

Prof. Dr. Mingzhe Yao
Prof. Dr. Kang Wei
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • tea plant (Camellia sinensis)
  • molecular mechanism
  • secondary metabolites
  • stress response
  • quality-related component
  • genes identification
  • QTL mapping
  • molecular functional markers

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Published Papers (2 papers)

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Research

20 pages, 8133 KiB  
Article
Light Regulated CoWRKY15 Acts on CoSQS Promoter to Promote Squalene Synthesis in Camellia oleifera Seeds
by Aori Li, Qinhui Du, Yanling Zeng, Rui Yang, Luyao Ge, Ziyan Zhu, Chenyan Li and Xiaofeng Tan
Int. J. Mol. Sci. 2024, 25(20), 11134; https://doi.org/10.3390/ijms252011134 - 17 Oct 2024
Viewed by 661
Abstract
Squalene synthase (SQS) is the most direct key enzyme regulating squalene synthesis. To better understand the regulatory mechanisms of squalene biosynthesis, a 1423-bp long promoter region of the CoSQS gene was isolated from Camellia oleifera. Plant CARE and PLACE analysis affirmed the [...] Read more.
Squalene synthase (SQS) is the most direct key enzyme regulating squalene synthesis. To better understand the regulatory mechanisms of squalene biosynthesis, a 1423-bp long promoter region of the CoSQS gene was isolated from Camellia oleifera. Plant CARE and PLACE analysis affirmed the existence of the core promoter elements such as TATA and CAAT boxes and transcription factor binding sites like W-box and MYB in the isolated sequence. Exogenous factors regulating the CoSQS promoter were obtained by using Yeast one-hybrid screening, and the key transcription factor CoWRKY15 was found. AOS (Antibody Optimization System) analysis showed that CoWRKY15 had the highest interactions with a confidence level of 0.9026. Bioinformatics analysis showed that CoWRKY15 belonged to class 2 of the WRKY gene family. The results of subcellular localization showed that CoWRKY15 functioned in the nucleus. The results of CoWRKY15 promoter analysis showed that 8 out of 14 cis-elements with annotatable functions were related to the light response. The region of the CoSQS promoter that interacts with CoWRKY15 is −186 bp~−536 bp. The histochemical assay and squalene content suggested that the CoSQS promoter could drive the expression of GUS gene and specific promotion of CoSQS expression. It was found that CoWRKY15 could act on the −186 bp~−536 bp CoSQS promoter to regulate the expression of CoSQS and the content of squalene in C. oleifera seed kernels. Full article
(This article belongs to the Special Issue Advances in Tea Tree Genetics and Breeding: 2nd Edition)
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17 pages, 3988 KiB  
Article
Transcriptome and Biochemical Analyses of a Chlorophyll-Deficient Bud Mutant of Tea Plant (Camellia sinensis)
by Yuanyuan Li, Chenyu Zhang, Chunlei Ma, Liang Chen and Mingzhe Yao
Int. J. Mol. Sci. 2023, 24(20), 15070; https://doi.org/10.3390/ijms242015070 - 11 Oct 2023
Cited by 3 | Viewed by 1591
Abstract
Tea leaf-color mutants have attracted increasing attention due to their accumulation of quality-related biochemical components. However, there is limited understanding of the molecular mechanisms behind leaf-color bud mutation in tea plants. In this study, a chlorina tea shoot (HY) and a green tea [...] Read more.
Tea leaf-color mutants have attracted increasing attention due to their accumulation of quality-related biochemical components. However, there is limited understanding of the molecular mechanisms behind leaf-color bud mutation in tea plants. In this study, a chlorina tea shoot (HY) and a green tea shoot (LY) from the same tea plant were investigated using transcriptome and biochemical analyses. The results showed that the chlorophyll a, chlorophyll b, and total chlorophyll contents in the HY were significantly lower than the LY’s, which might have been caused by the activation of several genes related to chlorophyll degradation, such as SGR and CLH. The down-regulation of the CHS, DFR, and ANS involved in flavonoid biosynthesis might result in the reduction in catechins, and the up-regulated GDHA and GS2 might bring about the accumulation of glutamate in HY. RT-qPCR assays of nine DEGs confirmed the RNA-seq results. Collectively, these findings provide insights into the molecular mechanism of the chlorophyll deficient-induced metabolic change in tea plants. Full article
(This article belongs to the Special Issue Advances in Tea Tree Genetics and Breeding: 2nd Edition)
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