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学者姓名：杨贞标
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Abstract ：
The versatile and pivotal roles of the phytohormone auxin in regulating plant growth and development are typically linked to its directional transport, relying on the polarized PIN-FORMED (PIN) auxin exporters at the plasma membrane (PM). For decades, auxin has been proposed to promote PIN polarization, generating self-regulatory feedback mediating much of plant development, but mechanistic insight into this regulation is lacking. Here, we uncover an auxin-induced protein complex at the PM, containing auxin co-receptors trans-membrane kinases (TMKs) and PIN1 auxin exporter, as the core machinery that underlies this feedback regulation. Auxin promotes PIN1 phosphorylation by TMKs, modulating PIN1 polarization and transport activity. We also provide evidence that PIN1-exported extracellular auxin is crucial for TMK activation and cell elongation, thus forming the simplest two-element self-regulatory feedback circuit. Thus, these findings offer direct mechanistic insights into a potential self-organizing circuit for auxin signaling and transport to ensure proper plant development in Arabidopsis.
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| GB/T 7714 | Huang Rongfeng , Wang Jiacheng , Chang Mingzeng et al. TMK-PIN1 drives a short self-organizing circuit for auxin export and signaling in Arabidopsis [J]. | DEVELOPMENTAL CELL , 2026 , 61 (1) . |
| MLA | Huang Rongfeng et al. "TMK-PIN1 drives a short self-organizing circuit for auxin export and signaling in Arabidopsis" . | DEVELOPMENTAL CELL 61 . 1 (2026) . |
| APA | Huang Rongfeng , Wang Jiacheng , Chang Mingzeng , Tang Wenxin , Yu Yongqiang , Zhang Yi et al. TMK-PIN1 drives a short self-organizing circuit for auxin export and signaling in Arabidopsis . | DEVELOPMENTAL CELL , 2026 , 61 (1) . |
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The impact of seasonal variations on the quality of oolong tea products remains a subject of ongoing exploration. This study delves into the intricate relationships between seasonality, metabolites, and sensory characteristics in finished oolong tea products. Metabolomic data from 266 Tieguanyin oolong tea products harvested in both spring and autumn, along with corresponding sensory evaluations, were acquired. Using OPLS-DA and PLS-DA models with UPLC-QToF/MS data, our findings showed that seasonal effects were notably more pronounced in light-scented Tieguanyin products (lightly-roasted) compared to strong-scented products (moderately-roasted). Furthermore, over half of the identified key seasonal discriminant metabolites happened to be crucial for determining the sensory grade. The study marks the first-time recognition of triterpene saponins as critical factors in determining both the harvest season and the sensory grade of oolong tea. These insights deepen our understanding of the interplays between seasonal variations, metabolites, and sensory attributes in oolong tea products.
Keyword ：
Harvest season Harvest season LCMS LCMS Sensory Sensory Tieguanyin tea Tieguanyin tea Untargeted metabolomics Untargeted metabolomics
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| GB/T 7714 | Zhou, Junling , Gao, Shuilian , Du, Zhenghua et al. Seasonal variations and sensory profiles of oolong tea: Insights from metabolic analysis of Tieguanyin cultivar [J]. | FOOD CHEMISTRY , 2025 , 462 . |
| MLA | Zhou, Junling et al. "Seasonal variations and sensory profiles of oolong tea: Insights from metabolic analysis of Tieguanyin cultivar" . | FOOD CHEMISTRY 462 (2025) . |
| APA | Zhou, Junling , Gao, Shuilian , Du, Zhenghua , Jin, Shan , Yang, Zhenbiao , Xu, Tongda et al. Seasonal variations and sensory profiles of oolong tea: Insights from metabolic analysis of Tieguanyin cultivar . | FOOD CHEMISTRY , 2025 , 462 . |
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马尾藻（Sargassum）是我国常见的褐藻，具有多种生物活性，在功能食品领域中具有广阔的应用前景。该研究通过单因素试验优化超声辅助法提取马尾藻多糖的条件，同时利用配备示差折光检测器的多角度激光散射仪（size-exclusion chromatographic analysis with multiangle laser light scattering detection and refractive index detector, SEC-MALLS-RI）、离子色谱仪、傅里叶红外光谱仪、核磁共振仪等对最优条件得到的马尾藻多糖进行结构表征，并对其体外抗氧化活性进行探究。提取的最优条件为超声频率28 kHz、料液比1∶60（g∶mL）、提取温度70℃、提取时间180 min,在该条件下马尾藻多糖的提取率为9.73%。马尾藻多糖主要由果糖、糖醛酸、岩藻糖、半乳糖和甘露糖组成，其摩尔比为56.6∶16.2∶8.4∶8.3∶6.8。SEC-MALLS-RI表明多糖样品重均分子质量为1.18×10～7（±3.13%）g/mol,并在溶液中高度分散。
Keyword ：
多糖 多糖 抗氧化活性 抗氧化活性 结构表征 结构表征 马尾藻 马尾藻
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| GB/T 7714 | 栾翠荣 , 温南华 , 李致瑜 et al. 马尾藻多糖超声波辅助提取、结构表征及抗氧化活性研究 [J]. | 食品与发酵工业 , 2025 , 51 (07) : 259-267 . |
| MLA | 栾翠荣 et al. "马尾藻多糖超声波辅助提取、结构表征及抗氧化活性研究" . | 食品与发酵工业 51 . 07 (2025) : 259-267 . |
| APA | 栾翠荣 , 温南华 , 李致瑜 , 覃亮卓 , 蒋璇靓 , 刘淑集 et al. 马尾藻多糖超声波辅助提取、结构表征及抗氧化活性研究 . | 食品与发酵工业 , 2025 , 51 (07) , 259-267 . |
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The impact of seasonality on the aroma quality of tea has been documented in various tea types, but not specifically in oolong tea. This study is the first to explore the complex relationships between seasonality, volatile compounds, and aroma quality in oolong tea. Using Headspace Solid-Phase Microextraction Gas Chromatography-Mass Spectrometry (HS-SPME-GC-MS)-based untargeted metabolomics, we analyzed 266 samples of Tieguanyin oolong tea. The data identified linalool, linalool oxides (trans-linalool oxide (furanoid) and trans-linalool oxide (pyranoid)), and their metabolites (diendiol I; hotrienol) as key seasonal discriminants. Four out of the top ten key differential compounds for distinguishing aroma scores were metabolites from fatty acid degradation, namely trans-3-hexenyl butyrate, trans-2-hexenyl hexanoate, hexyl hexanoate, and hexyl 2-methyl butyrate. Approximately one-fifth of the seasonal discriminant volatile compounds were significant in influencing aroma quality. Overall, the impact of seasonality on the aroma quality of finished Tieguanyin oolong tea is marginal. These findings enhance our understanding of the interplay between seasonal variations, volatile composition, and aroma quality in oolong tea.
Keyword ：
aroma quality aroma quality HS-SPME-GC-MS HS-SPME-GC-MS oolong tea oolong tea season season untargeted metabolomics untargeted metabolomics
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| GB/T 7714 | Zheng, Chao , Gao, Shuilian , Wang, Xiaxia et al. The Impact of Harvest Season on Oolong Tea Aroma Profile and Quality [J]. | PLANTS-BASEL , 2025 , 14 (15) . |
| MLA | Zheng, Chao et al. "The Impact of Harvest Season on Oolong Tea Aroma Profile and Quality" . | PLANTS-BASEL 14 . 15 (2025) . |
| APA | Zheng, Chao , Gao, Shuilian , Wang, Xiaxia , Yang, Zhenbiao , Zhou, Junling , Liu, Ying . The Impact of Harvest Season on Oolong Tea Aroma Profile and Quality . | PLANTS-BASEL , 2025 , 14 (15) . |
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Directional auxin transport and formation of auxin maxima are critical for embryogenesis, organogenesis, pattern formation, and growth coordination in plants, but the mechanisms underpinning the initiation and establishment of these auxin dynamics are not fully understood. Here we show that a self-initiating and -terminating transient auxin flow along the marginal cells (MCs) contributes to the formation of an auxin maximum at the tip of Arabidopsis cotyledon that globally coordinates the interdigitation of puzzle-shaped pavement cells in the cotyledon epidermis. Prior to the interdigitation, indole butyric acid (IBA) is converted to indole acetic acid (IAA) to induce PIN2 accumulation and polarization in the marginal cells, leading to auxin flow toward and accumulation at the cotyledon tip. Once IAA levels at the cotyledon tip reaches a maximum, it activates pavement cell interdigitation as well as the accumulation of the IBA transporter TOB1 in MCs, which sequesters IBA to the vacuole and reduces IBA availability and IAA levels. The reduction of IAA levels results in PIN2 down-regulation and cessation of the auxin flow. Hence, our results elucidate a self-activating and self-terminating transient polar auxin transport system in cotyledons, contributing to the formation of localized auxin maxima that spatiotemporally coordinate pavement cell interdigitation.
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| GB/T 7714 | Perez-Henriquez, Patricio , Nagawa, Shingo , Liu, Zhongchi et al. PIN2-mediated self-organizing transient auxin flow contributes to auxin maxima at the tip of Arabidopsis cotyledons [J]. | NATURE COMMUNICATIONS , 2025 , 16 (1) . |
| MLA | Perez-Henriquez, Patricio et al. "PIN2-mediated self-organizing transient auxin flow contributes to auxin maxima at the tip of Arabidopsis cotyledons" . | NATURE COMMUNICATIONS 16 . 1 (2025) . |
| APA | Perez-Henriquez, Patricio , Nagawa, Shingo , Liu, Zhongchi , Pan, Xue , Michniewicz, Marta , Tang, Wenxin et al. PIN2-mediated self-organizing transient auxin flow contributes to auxin maxima at the tip of Arabidopsis cotyledons . | NATURE COMMUNICATIONS , 2025 , 16 (1) . |
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Microorganisms residing in different parts of tea plants play an important role in the growth and development, disease resistance, and stress tolerance of the plants; these microorganisms have certain potential for improving the quality of tea. This forum mainly summarizes and discusses the role of microorganisms in regulating tea plants and their prospects for improving the quality of tea.
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| GB/T 7714 | Tang, Wenxin , Xin, Wei , Xu, Tongda et al. Tea plant microorganisms in the improvement of tea quality [J]. | TRENDS IN MICROBIOLOGY , 2025 , 33 (1) : 11-14 . |
| MLA | Tang, Wenxin et al. "Tea plant microorganisms in the improvement of tea quality" . | TRENDS IN MICROBIOLOGY 33 . 1 (2025) : 11-14 . |
| APA | Tang, Wenxin , Xin, Wei , Xu, Tongda , Yang, Zhenbiao . Tea plant microorganisms in the improvement of tea quality . | TRENDS IN MICROBIOLOGY , 2025 , 33 (1) , 11-14 . |
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Leaves have evolved shape diversity, ranging from simple leaves with a smooth margin to complicated shapes with toothed/serrated, lobed, and dissected leaves with leaflets. In the model plant Arabidopsis thaliana with simple leaves producing a serrated margin, boundary regulatory factor genes CUP SHAPED COTYLEDON 2 (CUC2) and CUC3 play important roles in promoting leaf initiation and maintenance of serration. Stem cell-related WUSCHEL-RELATED HOMEOBOX1 (WOX1) and PRESSED FLOWER (PRS)/WOX3 are also essential for leaf margin morphogenesis, but the role of WOX1 and PRS as well as the relationships between CUCs and WOXs for tooth development are unclear. In this study, we found that WOX1, but not PRS, prevents overproduction of number of teeth and excessive tooth size by limiting CUC3 expression to a moderate level in a temporally regulated manner. We also revealed that BRASSINAZOLE RESISTANT 1 (BZR1), a known regulator of plant development including boundary regions, is involved in WOX1 negative regulation of tooth development by repressing CUC3 expression during the initiation/early stage of tooth development. WOX1 parallelly limits BZR1 and CUC3 expression from the late stage of the first two teeth, while it restricts CUC3 activity in a BZR1-dependent manner from the initiation/early stage of subsequently developed teeth. This study uncovers a new mechanism for WOX1 in fine-tuning the leaf margin geometry.
Keyword ：
Arabidopsis Arabidopsis BZR1 BZR1 CUC3 CUC3 tooth tooth WOX1 WOX1
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| GB/T 7714 | Xu, Lian , Fang, Nimeng , Lu, Ting et al. WOX1 controls leaf serration development via temporally restricting BRASSINAZOLE RESISTANT 1 and CUP SHAPED COTYLEDON 3 expression in Arabidopsis [J]. | JOURNAL OF EXPERIMENTAL BOTANY , 2025 , 76 (2) : 478-492 . |
| MLA | Xu, Lian et al. "WOX1 controls leaf serration development via temporally restricting BRASSINAZOLE RESISTANT 1 and CUP SHAPED COTYLEDON 3 expression in Arabidopsis" . | JOURNAL OF EXPERIMENTAL BOTANY 76 . 2 (2025) : 478-492 . |
| APA | Xu, Lian , Fang, Nimeng , Lu, Ting , Tameshige, Toshiaki , Nakata, Miyuki T. , Jiang, Yuli et al. WOX1 controls leaf serration development via temporally restricting BRASSINAZOLE RESISTANT 1 and CUP SHAPED COTYLEDON 3 expression in Arabidopsis . | JOURNAL OF EXPERIMENTAL BOTANY , 2025 , 76 (2) , 478-492 . |
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The flavor profile of tea is influenced not only by different tea varieties but also by the surrounding soil environment. Recent studies have indicated the regulatory role of soil microbes residing in plant roots in nutrient uptake and metabolism. However, the impact of this regulatory mechanism on tea quality remains unclear. In this study, we showed that a consortium of microbes isolated from tea roots enhanced ammonia uptake and facilitated the synthesis of theanine, a key determinant of tea taste. Variations were observed in the composition of microbial populations colonizing tea roots and the rhizosphere across different seasons and tea varieties. By comparing the root microorganisms of the high-theanine tea variety Rougui with the low-theanine variety Maoxie, we identified a specific group of microbes that potentially modulate nitrogen metabolism, subsequently influencing the theanine levels in tea. Furthermore, we constructed a synthetic microbial community (SynCom) mirroring the microbe population composition found in Rougui roots. Remarkably, applying SynCom resulted in a significant increase in the theanine content of tea plants and imparted greater tolerance to nitrogen deficiency in Arabidopsis. Our study provides compelling evidence supporting the use of root microorganisms as functional microbial fertilizers to enhance tea quality.
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| GB/T 7714 | Xin, Wei , Zhang, Jianming , Yu, Yongdong et al. Root microbiota of tea plants regulate nitrogen homeostasis and theanine synthesis to influence tea quality [J]. | CURRENT BIOLOGY , 2024 , 34 (4) . |
| MLA | Xin, Wei et al. "Root microbiota of tea plants regulate nitrogen homeostasis and theanine synthesis to influence tea quality" . | CURRENT BIOLOGY 34 . 4 (2024) . |
| APA | Xin, Wei , Zhang, Jianming , Yu, Yongdong , Tian, Yunhe , Li, Hao , Chen, Xiaolu et al. Root microbiota of tea plants regulate nitrogen homeostasis and theanine synthesis to influence tea quality . | CURRENT BIOLOGY , 2024 , 34 (4) . |
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Aging is an irreversible pathophysiological process for all organisms. The accumulation of senescent cells in pathological sites or tissues is recognized as the major cause of diseases and disorders during the aging process. Small molecules that reduce senescent cell burdens have gained increasing attention as promising intervention therapeutics against aging, but effective anti-senescence agents remain rare. Camellia Sect. Chrysantha Chang is documented as a traditional Chinese herbal medicine used by ethnic groups for many medical and health benefits, but its effect on aging is unclear. Here, we investigated the anti-senescence potential of eight C. Sect. Chrysantha Chang species. The results show that ethyl acetate fractions from these C. Sect. Chrysantha Chang species were able to delay the senescence of H9c2 cardiomyocytes except for C. pingguoensis (CPg). N-butanol fractions of C. multipetala (CM), C. petelotii var. grandiflora (CPt), and C. longzhouensis (CL) showed a senescent cell clearance effect by altering the expression levels of senescent-associated marker genes in the DNA-damage response (DDR) pathway and the senescent cell anti-apoptotic pathway (SCAPs). By using UPLC-QTOF-MS-based non-targeted metabolomics analyses, 27 metabolites from Sect. Chrysantha species were putatively identified. Among them, high levels of sanchakasaponin C and D in CM, CPt, and CL were recognized as the key bioactive compounds responsible for senescent cell clearance. This study is the first to disclose and compare the anti-cell-senescence effect of a group of C. Sect. Chrysantha Chang, including some rare species. The combination of senescent markers and metabolomics analyses helped us to reveal the differences in chemical constituents that target senescent cells. Significantly, contrary to the C. chrysantha var. longistyla (CCL), which is widely cultivated and commercialized for tea drinks, CM, CPt, and CL contain unique chemicals for managing aging and aging-related diseases. The results from this study provide a foundation for species selection in developing small-molecule-based drugs to alleviate diseases and age-related dysfunctions and may potentially be useful for advancing geroscience research.
Keyword ：
anti-aging natural compounds anti-aging natural compounds Camellia Sect. Chrysantha Chang Camellia Sect. Chrysantha Chang cell senescence cell senescence metabolites metabolites
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| GB/T 7714 | Wu, Jiacheng , Bai, Quanzi , Chen, Jianghua et al. Systemic Analyses of Anti-Cell-Senescence Active Compounds in Camellia Sect. Chrysantha Chang and Their Mechanisms [J]. | PLANTS-BASEL , 2024 , 13 (15) . |
| MLA | Wu, Jiacheng et al. "Systemic Analyses of Anti-Cell-Senescence Active Compounds in Camellia Sect. Chrysantha Chang and Their Mechanisms" . | PLANTS-BASEL 13 . 15 (2024) . |
| APA | Wu, Jiacheng , Bai, Quanzi , Chen, Jianghua , Yang, Zhenbiao , Zhu, Xiaoyue . Systemic Analyses of Anti-Cell-Senescence Active Compounds in Camellia Sect. Chrysantha Chang and Their Mechanisms . | PLANTS-BASEL , 2024 , 13 (15) . |
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Cell functions are based on the integrity of actin filaments. The actin cytoskeleton is typically the target but also the source of signals. Arabidopsis PRL1 (Pleiotropic Regulatory Locus 1), regulates multiple cellular processes and physiological responses. However, the precise mechanisms underlying PRL1's multiple functions are unclear. Here, we show that PRL1 maintains actin integrity and concomitant cellular homeostasis. The cortical actin cytoskeleton was de-polymerized in the prl1 mutant, causing the developmental root defect. Actin depolymerization, rather than reactive oxygen species (ROS) imbalance, constituted the fundamental cause of retarded root growth in prl1 . ANAC085 upregulation by, and cooperation with, actin depolymerization triggered stele cell death in prl1 roots. Differential gene expression and alternative splicing defects resulting from actin depolymerization occurred independently in prl1 . Our work establishes the cause-effect relationships between actin depolymerization and downstream stress-related signals, revealing a novel function of PRL1 and enhancing the understanding of PRL's functional mechanisms.
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| GB/T 7714 | Wang, Chi , Wang, Xing , Yang, Zhenbiao et al. Pleiotropic regulatory locus 1 maintains actin cytoskeleton integrity and cellular homeostasis to enable Arabidopsis root growth [J]. | ISCIENCE , 2024 , 27 (8) . |
| MLA | Wang, Chi et al. "Pleiotropic regulatory locus 1 maintains actin cytoskeleton integrity and cellular homeostasis to enable Arabidopsis root growth" . | ISCIENCE 27 . 8 (2024) . |
| APA | Wang, Chi , Wang, Xing , Yang, Zhenbiao , Gao, Xiaowei . Pleiotropic regulatory locus 1 maintains actin cytoskeleton integrity and cellular homeostasis to enable Arabidopsis root growth . | ISCIENCE , 2024 , 27 (8) . |
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