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Camellia sinensis CsMYB4a participates in regulation of stamen growth by interaction with auxin signaling transduction repressor CsAUX/IAA4

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The Crop Journal 2024年第1期12卷 188-201页

作者： Guoliang Ma Mingzhuo Li Yingling Wu Changjuan Jiang Yifan Chen Dawei Xing Yue Zhao Yajun Liu Xiaolan Jiang Tao Xia Liping Gao School of Life Science Anhui Agricultural UniversityHefei 230036AnhuiChina Plant for Human Health institute Department of Plant and Microbial BiologyNorth Carolina State UniversityKannapolisNC 28081USA State Key Laboratory of tea Plant Biology and Utilization/Key Laboratory of tea Biology and tea Processing of Ministry of Agriculture/Anhui Provincial Laboratory of tea Plant Biology and Utilization Anhui Agricultural UniversityHefei 230036AnhuiChina

Subgroup 4(Sg4)members of the R2R3-MYB are generally known as negative regulators of the phenylpropanoid pathway in *** previous research showed that a R2R3-MYB Sg4 member from Camellia sinensis(CsMYB4a)inhibits expression of some genes in the phenylpropanoid pathway,but its physiological function in the tea plant remained ***,CsMYB4a was found to be highly expressed in anther and filaments,and participated in regulating filament *** analysis and exogenous auxin treatment showed that the target of CsMYB4a might be the auxin signal ***/indole-3-acetic acid 4(AUX/IAA4),a repressor in auxin signal transduction,was detected from a yeast two-hybrid screen using CsMYB4a as *** silencing assays showed that both CsIAA4 and CsMYB4a regulate filament *** plants overexpressing CsIAA4 were insensitive to exogenous a-NAA,consistent with overexpression of ***-protein interaction experiments revealed that CsMYB4a interacts with N-terminal of CsIAA4 to prevent CsIAA4 *** out of the endogenous NtIAA4 gene,a CsIAA4 homolog,in tobacco alleviated filament growth inhibition and a-NAA insensitivity in plants overexpressing *** results strongly suggest that CsMYB4a works synergistically with CsIAA4 and participates in regulation of the auxin pathway in stamen.

关键词： AUX/IAA4 Auxin signaling CsMYB4a Subgroup 4 R2R3-MYB

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Distinct Effects of Three tea Varieties Made green teas on Improving Diabetic Dyslipidemia Induced by High-Fat Diet in C57BL/6J Mice

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Food Science and Human Wellness 2024年

作者： Wei Gu Zhutong Wang Guohuo Wu Huimin Guo Huijun Cheng Cong Li Linbo Chen Daxiang Li Zhongwen Xie State Key Laboratory of tea Plant Biology and Utilization， School of tea and Food Sciences & Technology， Anhui Agricultural University Center for Biotechnology， Anhui Agricultural University College of Life Sciences， Anhui Agricultural University tea Research institute， Yunnan Academy of Agricultural Sciences

Currently， cultivated tea plants are classified into three varieties， namely， C. sinensis var. sinensis， C. sinensis var. assamica， and C. sinensis var. kucha. Three tea varieties made green teas (TVGTs) are widely consumed worldwide. However， a comparative investigation of the beneficial effects， mechanism， and characteristic compounds of TVGTs has not been reported. Here， three representative tea plant varieties， namely， C. sinensis var. sinensis cv. Fuding (FD)， C. sinensis var. assamica cv. Yunkang 10 (YK)， and C. sinensis var. kucha (KC)， planted in the same garden， were used to make green teas utilizing the same standard procedure. Our findings show that the TVGTs effectively improved hyperglycemia， obesity， dyslipidemia， fatty liver， and mesenteric artery (MA) hypercontractility in mice with diabetes and obesity induced by a high-fat diet (HFD) after 11- and 22-week interventions， with YK being the most effective at 22 weeks. Liver lipidomics indicated that the TVGTs restored the glycerophospholipid and sphingolipid balance and reduced triglycerides， with YK demonstrating superior effects. The TVGTs， particularly YK， suppressed triglyceride synthesis through the ARV1-FXR-SHP-SREBP-1c pathway. A chemical profile analysis revealed that YK green tea had enriched active compounds， including caffeine， quinic acid， L-theanine， gallic acid， and catechins， compared with FD and KC green teas， which may contribute to ameliorating diabetic dyslipidemia via synergistic action. As a representative tea variety of C. sinensis var. assamica， YK green tea was found to be superior to the other two green teas in preventing and treating diabetic dyslipidemia， especially with long-term consumption. These data provide important information for tea plant breeders and tea consumers.

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Mulberry leaf supplementation inhibits skatole deposition by regulating gut microbiota and upregulating liver cytochrome P4501A1 expression in finishing pigs

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Animal Nutrition 2024年第1期16卷 34-44页

作者： Yuqing Sun Xiaoming Men Tianbao Lin Bo Deng Shi Zhong Jinxi Huo Kaipeng Qin Zhiqiang Lv Ziwei Xu Yougui Li institute of Sericulture and tea Zhejiang Academy of Agricultural Sciences298 Deshengzhong RoadShangchengHangzhou 310021China institute of Animal Husbandry and Veterinary Science Zhejiang Academy of Agricultural Sciences298 Deshengzhong RoadShangchengHangzhou 310021China

Skatole,a strong fecal odor substance,is generated through microbial degradation of tryptophan in the animal *** easily accumulates in adipose tissue and affects meat *** this study,the effect of mulberry leaf supplementation on skatole in finishing pigs was *** a 35-day trial,20 finishing pigs(barrows and gilts)were fed with a basal diet or basal diet with 6%mulberry *** performance of the pigs(n=10)was automatically recorded by a performance-testing feeder system and 8 pigs in each treatment were slaughtered and sampled for the remaining *** and short-chain fatty acids were detected using HPLC and gas chromatography,*** microbiota were analyzed using 16S r RNA gene *** metabolomics analysis of feces and serum was performed with UHPLC-MS/*** major cytochrome P450(CYP)enzymes that catalyze skatole degradation in the liver were tested by using RT-PCR and Western *** of major bioactive compounds in mulberry leaves on the CYP genes were verified in the hepatic cell line Hep G2 in an in vitro test(n=3).In finishing pigs,mulberry leaf supplementation had no significant effect on the average daily gain,average daily feed intake,and feed conversion ratio(P>0.05),but reduced skatole levels in feces,serum,and backfat(P<0.05),and increased acetic acid levels in feces(P=0.027).Mulberry leaf supplementation decreased the relative abundance of the skatole-producing bacteria Megasphaera and Olsenella(P<0.05).Indole-3acetic acid,the intermediate that is essential for skatole production,was significantly reduced in feces by mulberry leaf supplementation(P<0.05)and was positively correlated with skatole content in feces(P=0.004).In pigs treated with mulberry leaves,liver CYP1A1 expression was increased(P<0.05)and was negatively correlated with skatole content in backfat(P=0.045).The in vitro test demonstrated that mulberry leaf polyphenols and polysaccharides could directly stimulate CYP1A1 expression in

关键词： Pig Skatole Mulberry leaf Microbiota Cytochrome P450

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A high-order target phase approach for the station-keeping of periodic orbits

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Astrodynamics 2024年第1期8卷 61-75页

作者： Xiaoyu Fu Nicola Baresi Roberto Armellin Surrey Space Centre University of SurreyGuildfordGU27XHUK Te PūnahaĀtea-Auckland Space institute University of AucklandAuckland1010New Zealand

A novel high-order target phase approach(TPhA)for the station-keeping of periodic orbits is proposed in this *** key elements of the TPhA method,the phase-angle Poincare map and high-order maneuver map,are constructed using differential algebra(DA)techniques to determine station-keeping epochs and calculate correction maneuvers.A stochastic optimization framework tailored for the TPhA-based station-keeping process is leveraged to search for fuel-optimal and error-robust TPhA ***-satellite orbits(QSOs)around Phobos are investigated to demonstrate the efficacy of TPhA in mutli-fidelity dynamical *** Carlo simulations demonstrated that the baseline QSO of JAXA’s Martian Moons eXploration(MMX)mission could be maintained with a monthly maneuver budget of approximately 1 m/s.

关键词： target phase approach(TPhA) station-keeping Poincarémap differential algebra(DA) quasi-satellite orbit(QSO)

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Perturbed initial orbit determination

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Astrodynamics 2024年第3期8卷 401-416页

作者： Alberto Fossà Matteo Losacco Roberto Armellin Institut Supérieur de l’Aéronautique et de l’Espace Toulouse31400France Te PūnahaĀtea-Space institute The University of AucklandAuckland1010New Zealand

An algorithm for robust initial orbit determination (IOD) under perturbed orbital dynamics is presented. By leveraging map inversion techniques defined in the algebra of Taylor polynomials, this tool returns a highly accurate solution to the IOD problem and estimates a range centered on the aforementioned solution in which the true orbit should lie. To meet the specified accuracy requirements, automatic domain splitting is used to wrap the IOD routines and ensure that the local truncation error, introduced by a polynomial representation of the state estimate, remains below a predefined threshold. The algorithm is presented for three types of ground-based sensors, namely range radars, Doppler-only radars, and optical telescopes, by considering their different constraints in terms of available measurements and sensor noise. Finally, the improvement in performance with respect to a Keplerian-based IOD solution is demonstrated using large-scale numerical simulations over a subset of tracked objects in low Earth orbit.

关键词： initial orbit determination(IOD) range radar Doppler radar optical telescope differential algebra(DA)

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Tourism Mode of tea Culture Museum in Guizhou:A Case Study of Meitan Modern tea Culture Museum Settlement

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Asian Agricultural Research 2024年第10期16卷 16-20页

作者： Yiran HU Min WANG Kaixun ZHOU Qijin WANG Xue MO Xiaoxia LIU Guizhou tea institute Guiyang 550006China Guizhou tea Culture Ecological Museum Meitan 564100China

Since the 14 th Five-Year Plan,tea culture has become very ***,due to the lack of brand awareness and overall planning,and the mechanical application of the model outside the province and other tourism products,Guizhou tea Culture Tourism presents a"strong tea,light culture,weak tourism".In view of this,in order to realize the positioning goal of"building a national demonstration zone for the integration of tea culture and tourism"in the 14 th Five-Year Plan of Guizhou tea industry,and explore the development mode of integration of tea culture and tourism with Guizhou characteristics,this study takes museum tourism as the breakthrough point,Meitan tea Museum settlement as the research object,and collects Meitan tea Museum tourism *** paper uses SWOT analysis to evaluate the Meitan tea Culture Museum Tourism model,and provides some recommendations for the development of tea culture museum tourism in Guizhou Province.

关键词： tea culture museum tourism Meitan in Guizhou Province tea culture museum settlement

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On-site rapid detection of multiple pesticide residues in tea leaves by lateral flow immunoassay

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Journal of Pharmaceutical Analysis 2024年第2期14卷 276-283页

作者： Junxia Gao Tianyi Zhang Yihua Fang Ying Zhao Mei Yang Li Zhao Ye Li Jun Huang Guonian Zhu Yirong Guo institute of Pesticide and Environmental Toxicology Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang ProvinceMinistry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and InsectsZhejiang UniversityHangzhou310058China tea Research institute Chinese Academy of Agricultural SciencesKey Laboratory of Tea Biology and Resources UtilizationMinistry of AgricultureHangzhou310008China Shanghai Agricultural Technology Extension Service Center Shanghai201103China School of Biological and Chemical Engineering Zhejiang University of Science and TechnologyHangzhou311200China

The application of pesticides (mostly insecticides and fungicides) during the tea-planting process will undoubtedly increase the dietary risk associated with drinking tea. Thus, it is necessary to ascertain whether pesticide residues in tea products exceed the maximum residue limits. However, the complex matrices present in tea samples comprise a major challenge in the analytical detection of pesticide residues. In this study, nine types of lateral flow immunochromatographic strips (LFICSs) were developed to detect the pesticides of interest (fenpropathrin, chlorpyrifos, imidacloprid, thiamethoxam, acetamiprid, carbendazim, chlorothalonil, pyraclostrobin, and iprodione). To reduce the interference of tea substrates on the assay sensitivity, the pretreatment conditions for tea samples, including the extraction solvent, extraction time, and purification agent, were optimized for the simultaneous detection of these pesticides. The entire testing procedure (including pretreatment and detection) could be completed within 30 min. The detected results of authentic tea samples were confirmed by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), which suggest that the LFICS coupled with sample rapid pretreatment can be used for on-site rapid screening of the target pesticide in tea products prior to their market release.

关键词： Lateral flow immunoassay Rapid detection Pesticide multi-residue tea matrix Sample rapid pretreatment

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Multi-Scale Mixed Attention tea Shoot Instance Segmentation Model

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Phyton-International Journal of Experimental Botany 2024年第2期93卷 261-275页

作者： Dongmei Chen Peipei Cao Lijie Yan Huidong Chen Jia Lin Xin Li Lin Yuan Kaihua Wu School of Automation Hangzhou Dianzi UniversityHangzhou310018China tea Research institute Chinese Academy of Agriculture SciencesHangzhou310018China School of Information Engineering Zhejiang University of Water Resources and Electric PowerHangzhou310018China

tea leaf picking is a crucial stage in tea production that directly influences the quality and value of the *** tea-picking machines may compromise the quality of the tea ***-quality teas are often handpicked and need more delicate operations in intelligent picking *** with traditional image processing techniques,deep learning models have stronger feature extraction capabilities,and better generalization and are more suitable for practical tea shoot ***,current research mostly focuses on shoot detection and cannot directly accomplish end-to-end shoot segmentation *** propose a tea shoot instance segmentation model based on multi-scale mixed attention(Mask2FusionNet)using a dataset from the tea garden in *** further analyzed the characteristics of the tea shoot dataset,where the proportion of small to medium-sized targets is 89.9%.Our algorithm is compared with several mainstream object segmentation algorithms,and the results demonstrate that our model achieves an accuracy of 82%in recognizing the tea shoots,showing a better performance compared to other *** ablation experiments,we found that ResNet50,PointRend strategy,and the Feature Pyramid Network(FPN)architecture can improve performance by 1.6%,1.4%,and 2.4%,*** experiments demonstrated that our proposed multi-scale and point selection strategy optimizes the feature extraction capability for overlapping small *** results indicate that the proposed Mask2FusionNet model can perform the shoot segmentation in unstructured environments,realizing the individual distinction of tea shoots,and complete extraction of the shoot edge contours with a segmentation accuracy of 82.0%.The research results can provide algorithmic support for the segmentation and intelligent harvesting of premium tea shoots at different scales.

关键词： tea shoots attention mechanism multi-scale feature extraction instance segmentation deep learning

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Effect of L-theanine combined with geniposide on depression-like behavior induced by the chronic unpredictable mild stress(CUMS) in mice

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Food Science and Human Wellness 2024年

作者： Qi-Ming Yu Yan Zhu Tao Jiang Ying Gao Nan Ling Na Wang John Shi Wei-Chun Pan Qi-Zhen Du Jun-Feng Yin tea Research institute Chinese Academy of Agricultural Sciences， Key Laboratory of tea Biology and Resources Utilization， Ministry of Agriculture College of Food and Health Sciences， Zhejiang A & F University Zhejiang Gongshang University Guelph Food Research Center， Agriculture and Agri-Food Canada College of Public Health， Guilin Medical University

Depression is a prevalent mental disorder with limited effective treatments， posing a significant global issue. This study explored L-theanine and geniposide， key components in "food-medicine homology" materials， to determine if their combination (TG) could alleviate depression-like behaviors and hippocampal neuronal damage in a chronic unpredictable mild stress (CUMS) mouse model. Male C57BL/6J mice were divided into control， CUMS model， and CUMS+TG groups with varying doses. The CUMS group displayed depression-like behaviors， including reduced activity and sucrose preference. TG treatment partially reversed these changes， significantly increasing antioxidant enzyme activities， decreasing pro-inflammatory cytokine levels， and improving neuromodulator levels. RNA-seq analysis identified the transthyretin (TTR) gene， upregulated in the model group but downregulated after TG treatment. TG treatment modulated intestinal microbiota composition compared to the CUMS group， including increased Firmicutes， reduced Bacteroidetes and Prevotella， and variable changes in Bifidobacterium abundance. In conclusion， our study indicates that CUMS exposure upregulates stress hormones and TTR expression， associated with neuroinflammation， oxidative stress， monoamine depletion， depression-like behaviors， and intestinal microbiota dysbiosis. TG treatment alleviates these effects and modulates intestinal microbiota， suggesting L-theanine and geniposide’s potential as a novel depression therapy.

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Review of the application of in-situ sensing techniques to address the tea growth characteristics from leaf to field

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 1-11页

作者： Qiong Cao Chunjiang Zhao Ze Xu Ping Jiang Haibin Yang Xiangyu Meng Guijun Yang Information Technology Research Center Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China College of Machnical and Electrical Engineering Hunan Agricultural UniversityChangsha 410125China tea Research institute of Chongqing Academy of Agricultural Sciences Chongqing 400000China

The tea plant is a valuable and evergreen crop that is extensively cultivated in China and many other ***,there is growing research interest in this *** the tea industry,it is crucial to develop rapid and non-invasive methods to evaluate tea plants in their natural *** article provides a comprehensive overview of non-invasive sensing techniques used for in-situ detection of tea *** topics covered include leaf,canopy,and field-level assessments,as well as statistical analysis techniques and characteristics specific to the ***-invasive testing technology is primarily used for monitoring and predicting tea pests and diseases,monitoring quality,and nutrients,determining tenderness and grade,identifying tea plant varieties,automatically detecting,and identifying tea buds,monitoring tea plant growth,and extracting tea garden areas through remote *** also helps to evaluate planting suitability,assess disasters,and estimate ***,the article examines the challenges and prospects of emerging techniques aimed at resolving the in-situ detection problem for tea *** can assist researchers and producers in comprehensively understanding the tea environment,quality characteristics,and growth process,thereby enhancing tea production quality,and fostering tea industry development.

关键词： non-destructive in-situ detection tea plants growth characteristics sensors

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