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学者姓名：张贞贞
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Abstract ：
The bZIP gene family play a crucial role in plant growth, development, and stress responses, functioning as transcription factors. While this gene family has been studied in several plant species, its roles in the endangered woody plant Phoebe bournei remain largely unclear. This study comprehensively analyzed the PbbZIP gene family in P. bournei, identifying 71 PbbZIP genes distributed across all 12 chromosomes. The amino acid count in these genes ranged from 74 to 839, with molecular weights varying from 8813.28 Da to 88,864.94 Da. Phylogenetic analysis categorized the PbbZIP genes into 12 subfamilies (A-K, S). Interspecific collinearity analysis revealed homologous PbbZIP genes between P. bournei and Arabidopsis thaliana. A promoter cis-acting element analysis indicated that PbbZIP genes contain various elements responsive to plant hormones, stress signals, and light. Additionally, expression analysis of public RNA-seq data showed that PbbZIP genes are distributed across multiple tissues, exhibiting distinct expression patterns specific to root bark, root xylem, stem bark, stem xylem, and leaves. We also performed qRT-PCR analysis on five representative PbbZIP genes (PbbZIP14, PbbZIP26, PbbZIP32, PbbZIP67, and PbbZIP69). The results demonstrated significant differences in the expression of PbbZIP genes under various abiotic stress conditions, including salt stress, heat, and drought. Notably, PbbZIP67 and PbbZIP69 exhibited robust responses under salt or heat stress conditions. This study confirmed the roles of the PbbZIP gene family in responding to various abiotic stresses, thereby providing insights into its functions in plant growth, development, and stress adaptation. The findings lay a foundation for future research on breeding and enhancing stress resistance in P. bournei.
Keyword ：
abiotic stresses abiotic stresses bZIP gene family bZIP gene family expression analysis expression analysis Phoebe bournei Phoebe bournei
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| GB/T 7714 | Feng, Yizhuo , Bakari, Almas , Guan, Hengfeng et al. An Investigation into the Evolutionary Characteristics and Expression Patterns of the Basic Leucine Zipper Gene Family in the Endangered Species Phoebe bournei Under Abiotic Stress Through Bioinformatics [J]. | PLANTS-BASEL , 2025 , 14 (15) . |
| MLA | Feng, Yizhuo et al. "An Investigation into the Evolutionary Characteristics and Expression Patterns of the Basic Leucine Zipper Gene Family in the Endangered Species Phoebe bournei Under Abiotic Stress Through Bioinformatics" . | PLANTS-BASEL 14 . 15 (2025) . |
| APA | Feng, Yizhuo , Bakari, Almas , Guan, Hengfeng , Wang, Jingyan , Zhang, Linping , Xu, Menglan et al. An Investigation into the Evolutionary Characteristics and Expression Patterns of the Basic Leucine Zipper Gene Family in the Endangered Species Phoebe bournei Under Abiotic Stress Through Bioinformatics . | PLANTS-BASEL , 2025 , 14 (15) . |
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Sugar-mediated regulation of hormone signaling is crucial for optimizing growth under normal conditions and ensuring survival during environmental stress. Previous studies have shown that sugar starvation induces the degradation of BRASSINAZOLE RESISTANT 1 (BZR1), the master transcription factor of the brassinosteroid (BR) signaling pathway, thereby inhibiting growth. However, the molecular mechanism linking sugar signaling to BZR1 degradation remains unknown. To identify proteins that mediate starvation-induced BZR1 degradation, we performed a quantitative proteomic analysis of the BZR1 interactome under starvation conditions and identified UBIQUITIN PROTEIN LIGASE 3 (UPL3) as a sugar-regulated protein that promotes BZR1 degradation and regulates growth and survival in response to sugar availability. upl3 mutants showed increased BZR1 accumulation and larger seedling size compared to the wild type under sugar-limiting conditions, but not when grown on sugar-containing medium, which indicates that UPL3 mediates BZR1 degradation and growth inhibition under sugar-limited conditions. Although upl3 mutations promoted growth under short-term starvation, they substantially reduced survival under long-term starvation. The enhanced growth phenotype of upl3 was also observed when target of rapamycin (TOR) was inactivated, but not when BR biosynthesis was blocked, suggesting that UPL3 acts downstream of sugar-TOR signaling to regulate BZR1 degradation. Furthermore, UPL3 protein levels increased post-transcriptionally in response to starvation and TOR inhibition, and decreased upon sugar treatment. Our study identifies UPL3 as a key molecular link between sugar signaling and BR signaling. We propose that sugar-TOR signaling inhibits UPL3 to promote BZR1 accumulation and growth, thereby optimizing plant growth and survival in response to sugar availability.
Keyword ：
brassinosteroid brassinosteroid BZR1 BZR1 starvation response starvation response sugar signaling sugar signaling ubiquitination ubiquitination UPL3 UPL3
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| GB/T 7714 | Zhang, Zhenzhen , Zhang, Hongliang , Feng, Lei et al. UPL3 promotes BZR1 degradation, growth arrest, and seedling survival under starvation stress in Arabidopsis [J]. | PLANT COMMUNICATIONS , 2025 , 6 (7) . |
| MLA | Zhang, Zhenzhen et al. "UPL3 promotes BZR1 degradation, growth arrest, and seedling survival under starvation stress in Arabidopsis" . | PLANT COMMUNICATIONS 6 . 7 (2025) . |
| APA | Zhang, Zhenzhen , Zhang, Hongliang , Feng, Lei , Wang, Antong , Lin, Zijie , Tan, Cunyi et al. UPL3 promotes BZR1 degradation, growth arrest, and seedling survival under starvation stress in Arabidopsis . | PLANT COMMUNICATIONS , 2025 , 6 (7) . |
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Phoebe bournei is an endangered and protected precious tree in China, valued both for high-quality timber and an ornamental property. Abiotic stress greatly affects the survival of Phoebe species. The basic leucine zipper (bZIP) transcription factor is evolutionarily conserved and plays a critical role in abiotic stress signaling in plants. However, studies on Phoebe bournei bZIP (PbbZIP) genes remain elusive. To determine the adaptation roles of the bZIP family, we performed a genome identification and expression profile analysis in P. bournei. A total of 71 PbbZIP genes were identified across 12 chromosomes and divided into 12 major subgroups by phylogenetic analysis, which revealed strong collinearity with Arabidopsis thaliana chromosomes. In addition, an analysis of their physicochemical characteristics indicated nuclear localization for all PbbZIP proteins, with most exhibiting hydrophilicity or amphiphilic features. The PbbZIP genes play a crucial role in stress responses. Specifically, at least five of these genes exhibit dynamic expression patterns in response to temperature, drought, and salt stress. Notably, PbbZIP 67 shows significantly elevated expression levels under both saline and heat conditions. Moreover, PbbZIP 32 and PbbZIP 14 display notably higher expression levels under heat and drought conditions, respectively, compared to normal conditions. These findings indicate that they play important roles in stress tolerance, highlighting their significance in helping organisms adapt to adverse environmental factors. This study sheds light on the evolution and functional adaptation of PbbZIP genes and provides valuable resources for promoting the stress tolerance of Phoebe bournei. © 2025, The Authors. All rights reserved.
Keyword ：
Abiotic Abiotic Biotic Biotic Plant diseases Plant diseases Transcription Transcription
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| GB/T 7714 | Zhang, Zhenzhen , Bakari, Almas , Lv, Mengmeng et al. Genome-Wide Identification of Bzip Genes in Phoebe Bournei and Their Roles in Response to Abiotic Stress [J]. | SSRN , 2025 . |
| MLA | Zhang, Zhenzhen et al. "Genome-Wide Identification of Bzip Genes in Phoebe Bournei and Their Roles in Response to Abiotic Stress" . | SSRN (2025) . |
| APA | Zhang, Zhenzhen , Bakari, Almas , Lv, Mengmeng , Guan, Hengfeng , Xu, Menglan , Zhang, Linping et al. Genome-Wide Identification of Bzip Genes in Phoebe Bournei and Their Roles in Response to Abiotic Stress . | SSRN , 2025 . |
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Brassinosteroid (BR) signaling leads to the nuclear accumulation of the BRASSINAZOLE-RESISTANT 1 (BZR1) transcription factor, which plays dual roles in activating or repressing the expression of thousands of genes. BZR1 represses gene expression by recruiting histone deacetylases, but how it activates transcription of BR -induced genes remains unclear. Here, we show that BR reshapes the genome-wide chromatin accessibility landscape, increasing the accessibility of BR -induced genes and reducing the accessibility of BR -repressed genes in Arabidopsis. BZR1 physically interacts with the BRAHMA -associated SWI/SNF (BAS) -chromatin -remodeling complex on the genome and selectively recruits the BAS complex to BR -activated genes. Depletion of BAS abrogates the capacities of BZR1 to increase chromatin accessibility, activate gene expression, and promote cell elongation without affecting BZR1's ability to reduce chromatin accessibility and expression of BR -repressed genes. Together, these data identify that BZR1 recruits the BAS complex to open chromatin and to mediate BR -induced transcriptional activation of growth -promoting genes.
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| GB/T 7714 | Zhu, Tao , Wei, Chuangqi , Yu, Yaoguang et al. The BAS chromatin remodeler determines activation and plant growth in Arabidopsis [J]. | DEVELOPMENTAL CELL , 2024 , 59 (7) . |
| MLA | Zhu, Tao et al. "The BAS chromatin remodeler determines activation and plant growth in Arabidopsis" . | DEVELOPMENTAL CELL 59 . 7 (2024) . |
| APA | Zhu, Tao , Wei, Chuangqi , Yu, Yaoguang , Zhang, Zhenzhen , Zhu, Jiameng , Liang, Zhenwei et al. The BAS chromatin remodeler determines activation and plant growth in Arabidopsis . | DEVELOPMENTAL CELL , 2024 , 59 (7) . |
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To ensure survival and promote growth, sessile plants have developed intricate internal signaling networks tailored in diverse cells and organs with both shared and specialized functions that respond to various internal and external cues. A fascinating question arises: how can a plant cell or organ diagnose the spatial and temporal information it is experiencing to know "where I am,"and then is able to make the accurate specific responses to decide "where to go"and "how to go,"despite the absence of neuronal systems found in mammals. Drawing inspiration from recent comprehensive investigations into diverse nutrient signaling pathways in plants, this review focuses on the interactive nutrient signaling networks mediated by various nutrient sensors and transducers. We assess and illustrate examples of how cells and organs exhibit specific responses to changing spatial and temporal information within these interactive plant nutrient networks. In addition, we elucidate the underlying mechanisms by which plants employ posttranslational modification codes to integrate different upstream nutrient signals, thereby conferring response specificities to the signaling hub proteins. Furthermore, we discuss recent breakthrough studies that demonstrate the potential of modulating nutrient sensing and signaling as promising strategies to enhance crop yield, even with reduced fertilizer application.
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| GB/T 7714 | Zhang, Zhenzhen , Zhong, Zhaochen , Xiong, Yan . Sailing in complex nutrient signaling networks Where I am, where to go, and how to go? [J]. | MOLECULAR PLANT , 2023 , 16 (10) : 1635-1660 . |
| MLA | Zhang, Zhenzhen et al. "Sailing in complex nutrient signaling networks Where I am, where to go, and how to go?" . | MOLECULAR PLANT 16 . 10 (2023) : 1635-1660 . |
| APA | Zhang, Zhenzhen , Zhong, Zhaochen , Xiong, Yan . Sailing in complex nutrient signaling networks Where I am, where to go, and how to go? . | MOLECULAR PLANT , 2023 , 16 (10) , 1635-1660 . |
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Author summary Genetic studies of the brassinosteroid (BR) deficient mutants revealed its essential role in seedling development in the dark, but subsequent studies showed no significant difference in BR level between seedlings grown under light and darkness. We recently observed that light does affect BR levels in Arabidopsis, but in a sugar dependent manner. In the dark, sugar increases BR level as well as BR sensitivity by stabilizing the steroid response factor BZR1 through the Target of Rapamycin (TOR) signaling pathway. However, the BR level is decreased by sugar under light and by darkness on sugar-free medium. These observations raised the question of how the combinations of light and sugar modulate BR signaling. We addressed this question using genetic physiological analyses and found interestingly that sugar inhibits brassinosteroid response in light-grown plants by stabilizing the glycogen synthase kinase 3 homolog BIN2 and attenuating the dephosphorylation of BZR1, but independently of TOR. Our results indicate that sugar acts through distinct pathways to promote and inhibit BR signaling in dark and light conditions. Our work illustrates an intricate three-way crosstalk whereby the combination of light and sugar signals modulate the brassinosteroid signaling pathway to optimize growth according to both environmental and metabolic conditions. Sugar, light, and hormones are major signals regulating plant growth and development, however, the interactions among these signals are not fully understood at the molecular level. Recent studies showed that sugar promotes hypocotyl elongation by activating the brassinosteroid (BR) signaling pathway after shifting Arabidopsis seedlings from light to extended darkness. Here, we show that sugar inhibits BR signaling in Arabidopsis seedlings grown under light. BR induction of hypocotyl elongation in seedlings grown under light is inhibited by increasing concentration of sucrose. The sugar inhibition of BR response is correlated with decreased effect of BR on the dephosphorylation of BZR1, the master transcription factor of the BR signaling pathway. This sugar effect is independent of the sugar sensors Hexokinase 1 (HXK1) and Target of Rapamycin (TOR), but requires the GSK3-like kinase Brassinosteroid-Insensitive 2 (BIN2), which is stabilized by sugar. Our study uncovers an inhibitory effect of sugar on BR signaling in plants grown under light, in contrast to its promotive effect in the dark. Such light-dependent sugar-BR crosstalk apparently contributes to optimal growth responses to photosynthate availability according to light-dark conditions.
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| GB/T 7714 | Zhang, Zhenzhen , Sun, Ying , Jiang, Xue et al. Sugar inhibits brassinosteroid signaling by enhancing BIN2 phosphorylation of BZR1 [J]. | PLOS GENETICS , 2021 , 17 (5) . |
| MLA | Zhang, Zhenzhen et al. "Sugar inhibits brassinosteroid signaling by enhancing BIN2 phosphorylation of BZR1" . | PLOS GENETICS 17 . 5 (2021) . |
| APA | Zhang, Zhenzhen , Sun, Ying , Jiang, Xue , Wang, Wenfei , Wang, Zhi-Yong . Sugar inhibits brassinosteroid signaling by enhancing BIN2 phosphorylation of BZR1 . | PLOS GENETICS , 2021 , 17 (5) . |
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Key message PSBR1 is a moso bamboo gene negatively regulated by brassinosteroid, which encodes a mitochondrial localized protein. Overexpression of PSBR1 leads to growth inhibition in various growth progresses in Arabidopsis. The young shoot of moso bamboo (Phyllostachys edulis) is known as one of the fastest growing plant organs. The roles of phytohormones in the fast-growth of bamboo shoot are not fully understood. Brassinosteroids (BRs) are a group of growth-promoting steroid hormones that play important roles in cell elongation and division. While BR related genes are highly enriched in fast-growing internodes in moso bamboo, the functions of BR in the fast-growth process is not understood at the molecular level. Here, we identified a poaceae specific gene, PSBR1 (Poaceae specific and BR responsive gene 1) from the moso bamboo genome. PSBR1 was highly expressed in the stem and leaves of bamboo seedling, and the elongating nodes of fast-growing bamboo shoot. PSBR1 ' s expression is increased by BR biosynthesis inhibitor propiconazole but decreased by BR treatment. PSBR1 encodes a novel protein that is localized to the mitochondria in tobacco and bamboo protoplast. The Arabidopsis transgenic plants overexpressing PSBR1 show growth inhibition in both vegetative and reproductive stages. This study suggests that PSBR1 is a BR regulated mitochondrial protein in bamboo, which inhibits plant growth when overexpressed in Arabidopsis.
Keyword ：
Brassinosteroid Brassinosteroid Mitochondria Mitochondria Moso bamboo Moso bamboo Poaceae Poaceae PSBR1 PSBR1
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| GB/T 7714 | Guo, Zejun , Zhang, Zhe , Yang, Xuelian et al. PSBR1, encoding a mitochondrial protein, is regulated by brassinosteroid in moso bamboo (Phyllostachys edulis) [J]. | PLANT MOLECULAR BIOLOGY , 2020 , 103 (1-2) : 63-74 . |
| MLA | Guo, Zejun et al. "PSBR1, encoding a mitochondrial protein, is regulated by brassinosteroid in moso bamboo (Phyllostachys edulis)" . | PLANT MOLECULAR BIOLOGY 103 . 1-2 (2020) : 63-74 . |
| APA | Guo, Zejun , Zhang, Zhe , Yang, Xuelian , Yin, Kuixing , Chen, Yitao , Zhang, Zhenzhen et al. PSBR1, encoding a mitochondrial protein, is regulated by brassinosteroid in moso bamboo (Phyllostachys edulis) . | PLANT MOLECULAR BIOLOGY , 2020 , 103 (1-2) , 63-74 . |
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For maintenance of cellular homeostasis, the actions of growth-promoting hormones must be attenuated when nutrient and energy become limiting. The molecular mechanisms that coordinate hormone-dependent growth responses with nutrient availability remain poorly understood in plants [1, 2]. The target of rapamycin (TOR) kinase is an evolutionarily conserved master regulator that integrates nutrient and energy signaling to regulate growth and homeostasis in both animals and plants [3-7]. Here, we show that sugar signaling through TOR controls the accumulation of the brassinosteroid (BR)-signaling transcription factor BZR1, which is essential for growth promotion by multiple hormonal and environmental signals [8-11]. Starvation, caused by shifting of light-grown Arabidopsis seedlings into darkness, as well as inhibition of TOR by inducible RNAi, led to plant growth arrest and reduced expression of BR-responsive genes. The growth arrest caused by TOR inactivation was partially recovered by BR treatment and the gain-of-function mutation bzr1-1D, which causes accumulation of active forms of BZR1 [12]. Exogenous sugar promoted BZR1 accumulation and seedling growth, but such sugar effects were largely abolished by inactivation of TOR, whereas the effect of TOR inactivation on BZR1 degradation is abolished by inhibition of autophagy and by the bzr1-1D mutation. These results indicate that cellular starvation leads sequentially to TOR inactivation, autophagy, and BZR1 degradation. Such regulation of BZR1 accumulation by glucose-TOR signaling allows carbon availability to control the growth promotion hormonal programs, ensuring supply-demand balance in plant growth.
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| GB/T 7714 | Zhang, Zhenzhen , Zhu, Jia-Ying , Roh, Jeehee et al. TOR Signaling Promotes Accumulation of BZR1 to Balance Growth with Carbon Availability in Arabidopsis [J]. | CURRENT BIOLOGY , 2016 , 26 (14) : 1854-1860 . |
| MLA | Zhang, Zhenzhen et al. "TOR Signaling Promotes Accumulation of BZR1 to Balance Growth with Carbon Availability in Arabidopsis" . | CURRENT BIOLOGY 26 . 14 (2016) : 1854-1860 . |
| APA | Zhang, Zhenzhen , Zhu, Jia-Ying , Roh, Jeehee , Marchive, Chloe , Kim, Seong-Ki , Meyer, Christian et al. TOR Signaling Promotes Accumulation of BZR1 to Balance Growth with Carbon Availability in Arabidopsis . | CURRENT BIOLOGY , 2016 , 26 (14) , 1854-1860 . |
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Plant growth is controlled by integration of hormonal and light-signaling pathways. BZS1 is a B-box zinc finger protein previously characterized as a negative regulator in the brassinosteroid (BR)-signaling pathway and a positive regulator in the light-signaling pathway. However, the mechanisms by which BZS1/BBX20 integrates light and hormonal pathways are not fully understood. Here, using a quantitative proteomic workflow, we identified several BZS1-associated proteins, including light-signaling components COP1 and HY5. Direct interactions of BZS1 with COP1 and HY5 were verified by yeast two-hybrid and co-immunoprecipitation assays. Overexpression of BZS1 causes a dwarf phenotype that is suppressed by the hy5 mutation, while overexpression of BZS1 fused with the SRDX transcription repressor domain (BZS1-SRDX) causes a long-hypocotyl phenotype similar to hy5, indicating that BZS1's function requires HY5. BZS1 positively regulates HY5 expression, whereas HY5 negatively regulates BZS1 protein level, forming a feedback loop that potentially contributes to signaling dynamics. In contrast to BR, strigolactone (SL) increases BZS1 level, whereas the SL responses of hypocotyl elongation, chlorophyll and HY5 accumulation are diminished in the BZS1-SRDX seedlings, indicating that BZS1 is involved in these SL responses. These results demonstrate that BZS1 interacts with HY5 and plays a central role in integrating light and multiple hormone signals for photomorphogenesis in Arabidopsis. Copyright (C) 2016, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, and Genetics Society of China. Published by Elsevier Limited and Science Press. All rights reserved.
Keyword ：
BZS1/BBX20 BZS1/BBX20 COP1 COP1 HY5 HY5 Immunoprecipitation Immunoprecipitation Light signaling Light signaling Mass spectrometry Mass spectrometry Strigolactone Strigolactone
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| GB/T 7714 | Wei, Chuang-Qi , Chien, Chih-Wei , Ai, Lian-Feng et al. The Arabidopsis B-box protein BZS1/BBX20 interacts with HY5 and mediates strigolactone regulation of photomorphogenesis [J]. | JOURNAL OF GENETICS AND GENOMICS , 2016 , 43 (9) : 555-563 . |
| MLA | Wei, Chuang-Qi et al. "The Arabidopsis B-box protein BZS1/BBX20 interacts with HY5 and mediates strigolactone regulation of photomorphogenesis" . | JOURNAL OF GENETICS AND GENOMICS 43 . 9 (2016) : 555-563 . |
| APA | Wei, Chuang-Qi , Chien, Chih-Wei , Ai, Lian-Feng , Zhao, Jun , Zhang, Zhenzhen , Li, Kathy H. et al. The Arabidopsis B-box protein BZS1/BBX20 interacts with HY5 and mediates strigolactone regulation of photomorphogenesis . | JOURNAL OF GENETICS AND GENOMICS , 2016 , 43 (9) , 555-563 . |
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