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Special Issue "Advances in Tea Tree Genetics and Breeding"

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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: closed (30 September 2023) | Viewed by 2169

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Special Issue Editors

Prof. Dr. Kang Wei

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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

Prof. Dr. Mingzhe Yao

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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 Issue Information

Dear Colleagues,

With the publication of high-quality reference sequences of tea plants and re-sequencing data from different tea accessions, advances in tea plant research have been developed, from secondary metabolism to genetic mechanism exploration, the identification of certain bioactive compounds, and novel genes related to key traits, all of which have largely extended our understanding of tea genetics and breeding. Among them, phenotypic changes including flavonoids, amino acids, caffeine, appearance, and responses to environmental factors in special tea varieties have attracted the attention of both customers and scientists. These changing phenotypes are closely associated with key genes which are largely unknown. Exploring these genes and understanding their underlying mechanisms will improve tea breeding in the future.

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

Prof. Dr. Kang Wei
Prof. Dr. Mingzhe Yao
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

Published Papers (3 papers)

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Open AccessArticle

Shading-Dependent Greening Process of the Leaves in the Light-Sensitive Albino Tea Plant ‘Huangjinya’: Possible Involvement of the Light-Harvesting Complex II Subunit of Photosystem II in the Phenotypic Characteristic

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Int. J. Mol. Sci. 2023, 24(12), 10314; https://doi.org/10.3390/ijms241210314 - 18 Jun 2023

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Abstract

The light-sensitive albino tea plant can produce pale-yellow shoots with high levels of amino acids which are suitable to process high-quality tea. In order to understand the mechanism of the albino phenotype formation, the changes in the physio-chemical characteristics, chloroplast ultrastructure, chlorophyll-binding proteins, and the relevant gene expression were comprehensively investigated in the leaves of the light-sensitive albino cultivar ‘Huangjinya’ (‘HJY’) during short-term shading treatment. In the content of photosynthetic pigments, the ultrastructure of the chloroplast, and parameters of the photosynthesis in the leaves of ‘HJY’ could be gradually normalized along with the extension of the shading time, resulting in the leaf color transformed from pale yellow to green. BN-PAGE and SDS-PAGE revealed that function restoration of the photosynthetic apparatus was attributed to the proper formation of the pigment-protein complexes on the thylakoid membrane that benefited from the increased levels of the LHCII subunits in the shaded leaves of ‘HJY’, indicating the low level of LHCII subunits, especially the lack of the Lhcb1 might be responsible for the albino phenotype of the ‘HJY’ under natural light condition. The deficiency of the Lhcb1 was mainly subject to the strongly suppressed expression of the Lhcb1.x which might be modulated by the chloroplast retrograde signaling pathway GUN1 (GENOMES UNCOUPLED 1)-PTM (PHD type transcription factor with transmembrane domains)-ABI4 (ABSCISIC ACID INSENSITIVE 4). Full article

(This article belongs to the Special Issue Advances in Tea Tree Genetics and Breeding)

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Open AccessArticle

Multi-Omics Analysis Reveals Mechanisms of Strong Phosphorus Adaptation in Tea Plant Roots

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Int. J. Mol. Sci. 2023, 24(15), 12431; https://doi.org/10.3390/ijms241512431 - 04 Aug 2023

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Abstract

Low phosphorus (P) is a major limiting factor for plant growth in acid soils, which are preferred by tea plants. This study aims to investigate the unique mechanisms of tea plant roots adaptation to low-P conditions. Tea plant roots were harvested for multi-omics analysis after being treated with 0 µmol·L⁻¹ P (0P) and 250 µmol·L⁻¹ P (250P) for 30 days. Under 250P conditions, root elongation was significantly inhibited, and the density of lateral roots was dramatically increased. This suggests that 250P may inhibit the elongation of tea plant roots. Moreover, the P concentration in roots was about 4.58 times higher than that under 0P, indicating that 250P may cause P toxicity in tea plant roots. Contrary to common plants, the expression of CsPT1/2 in tea plant roots was significantly increased by four times at 250P, which indicated that tea plant roots suffering from P toxicity might be due to the excessive expression of phosphate uptake-responsible genes under 250P conditions. Additionally, 94.80% of P-containing metabolites accumulated due to 250P stimulation, most of which were energy-associated metabolites, including lipids, nucleotides, and sugars. Especially the ratio of AMP/ATP and the expression of energy sensor CsSnRKs were inhibited by P application. Therefore, under 250P conditions, P over-accumulation due to the excessive expression of CsPT1/2 may inhibit energy metabolism and thus the growth of tea plant roots. Full article

(This article belongs to the Special Issue Advances in Tea Tree Genetics and Breeding)

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Open AccessReview

Application of Multi-Perspectives in Tea Breeding and the Main Directions

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Int. J. Mol. Sci. 2023, 24(16), 12643; https://doi.org/10.3390/ijms241612643 - 10 Aug 2023

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Abstract

Tea plants are an economically important crop and conducting research on tea breeding contributes to enhancing the yield and quality of tea leaves as well as breeding traits that satisfy the requirements of the public. This study reviews the current status of tea plants germplasm resources and their utilization, which has provided genetic material for the application of multi-omics, including genomics and transcriptomics in breeding. Various molecular markers for breeding were designed based on multi-omics, and available approaches in the direction of high yield, quality and resistance in tea plants breeding are proposed. Additionally, future breeding of tea plants based on single-cellomics, pangenomics, plant–microbe interactions and epigenetics are proposed and provided as references. This study aims to provide inspiration and guidance for advancing the development of genetic breeding in tea plants, as well as providing implications for breeding research in other crops. Full article

(This article belongs to the Special Issue Advances in Tea Tree Genetics and Breeding)

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