New Phytologist最新文献

{"title":"Agricultural disturbance reduces arbuscular mycorrhizal fungal diversity and biomass by excluding specialist species.","authors":"Tanel Vahter,Alar Astover,John Davison,Inga Hiiesalu,Anne Ingver,Reine Koppel,Siqiao Liu,Evelin Loit-Harro,Anne Luik,Jane Oja,Priit Penu,Siim-Kaarel Sepp,Merili Simmer,Liina Talgre,Ilmar Tamm,Ülle Tamm,Martti Vasar,A Y Ayesh Piyara Wipulasena,Martin Zobel,Maarja Öpik","doi":"10.1111/nph.70548","DOIUrl":"https://doi.org/10.1111/nph.70548","url":null,"abstract":"This study investigates how agricultural disturbance influences arbuscular mycorrhizal (AM) fungal diversity, biomass, and community niche structure. Utilizing niche concepts, we show that the AM fungal communities in intensively managed soils exhibited larger niche volumes and an increased proportion of culturable taxa, which negatively impacted biomass production. This process was primarily driven by the reduction in specialist taxa, indicating a functional homogenization of the community. Intensively disturbed low-biomass AM fungal communities were composed of species that can persist under low host abundance. Our findings reveal that intensive management disturbance significantly decreased AM fungal species richness and biomass simultaneously. Preserving AM fungal diversity is essential for maintaining their biomass and functionality, underscoring the detrimental effects of intensive agricultural practices on these critical soil organisms and their potential consequences for soil health and ecosystem functioning.","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"24 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144995721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The WRKY76‐miR528‐SOD2 module: regulating submergence tolerance through ROS scavenging in sorghum","authors":"Xiangxiang Meng, Yan Xu, Ruili Hao, Xiao Fu, Yanqing Ding, Ruifeng Zhao, Lulu Dai, Haoran Zhang, Yufeng Zhou, Liyi Zhang, Ruibo Hu, Na Sui, Zhaosheng Kong, Aixia Li, Shengjun Li","doi":"10.1111/nph.70542","DOIUrl":"https://doi.org/10.1111/nph.70542","url":null,"abstract":"Summary<jats:list list-type=\"bullet\"> <jats:list-item>Flooding significantly threatens global agricultural productivity, especially under the pressures of climate change. To address this urgent environmental challenge, the development of flooding‐tolerant crops is imperative. However, our understanding of the molecular mechanisms underlying flooding tolerance in plants, particularly in crops, remains limited.</jats:list-item> <jats:list-item>Our findings demonstrate natural variation in submergence tolerance among diverse sorghum populations. Comparative transcriptomic analyses reveal that the submergence‐tolerant accession SC473 exhibits a lower abundance of SbmiR528, a monocot‐specific microRNA, compared with its sensitive counterpart SC449. This reduction correlates with an increased accumulation of <jats:italic>Superoxide dismutase 2</jats:italic> (<jats:italic>SOD2</jats:italic>) transcript, which encodes one of the reactive oxygen species (ROS)‐scavenging enzymes.</jats:list-item> <jats:list-item>We further reveal that the transcription factor SbWRKY76 directly binds the <jats:italic>SbMIR528</jats:italic> promoter to activate its transcription. Notably, <jats:italic>SbWRKY76</jats:italic> expression is significantly elevated in the submergence‐sensitive variety SC449. Overexpression of either <jats:italic>SbWRKY76</jats:italic> or <jats:italic>SbMIR528</jats:italic> in sorghum results in reduced submergence tolerance.</jats:list-item> <jats:list-item>This study represents the first identification of the SbWRKY76‐SbmiR528‐SbSOD2 module as a novel regulatory axis governing sorghum submergence response by fine‐tuning ROS scavenging. These findings offer pivotal targets for breeding or engineering climate‐resilient crops to mitigate flooding impacts.</jats:list-item> </jats:list>","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"122 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144995155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Arabidopsis root defense barriers support beneficial interactions with rhizobacterium Pseudomonas simiaeWCS417","authors":"Jiayu Zhou, Melissa Uribe Acosta, Max J. J. Stassen, Run Qi, Ronnie de Jonge, Fred White, Gertjan Kramer, Lemeng Dong, Corné M. J. Pieterse, Ioannis A. Stringlis","doi":"10.1111/nph.70549","DOIUrl":"https://doi.org/10.1111/nph.70549","url":null,"abstract":"Summary<jats:list list-type=\"bullet\"> <jats:list-item>Plant roots interact with pathogenic and beneficial microbes in the soil. While root defense barriers block pathogens, their roles in facilitating beneficial plant–microbe associations are understudied. Here, we examined the impact of specific root defense barriers on the well‐known beneficial association between <jats:italic>Arabidopsis thaliana</jats:italic> and the plant growth‐promoting rhizobacterium <jats:italic>Pseudomonas simiae</jats:italic> WCS417.</jats:list-item> <jats:list-item>Using 15 Arabidopsis mutants with alterations in structural (cutin, suberin, callose, and lignin) and chemical (camalexin and glucosinolates) defense barriers, we demonstrate that some barriers impact WCS417‐mediated plant growth responses and its root colonization.</jats:list-item> <jats:list-item>Root exudates from Arabidopsis wild‐type (WT) and mutant plants differentially affected the WCS417 transcriptome, with camalexin notably impacting bacterial motility and chemotaxis, which was also confirmed by <jats:italic>in vitro</jats:italic> studies. On the plant side, WCS417‐induced transcriptome changes in the roots of defense barrier mutants were significantly different from those in WT plants, particularly affecting growth and defense‐related processes. Specifically, the data indicated altered activity of reactive oxygen species in several of the defense barrier mutants, which was confirmed <jats:italic>in planta</jats:italic>.</jats:list-item> <jats:list-item>Our data suggest that various root defense barriers play a role in balancing growth and defense during this mutualistic interaction, thereby impacting the establishment and effectiveness of plant mutualists, extending their established role in disease resistance.</jats:list-item> </jats:list>","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"104 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144995158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TaGSK3 phosphorylates TaNLP7 to repress nitrogen deficiency-induced leaf senescence in wheat","authors":"Ziyi Yang,&nbsp;Wanqing Bai,&nbsp;Guanghui Guo,&nbsp;Shuxian Huang,&nbsp;Yufan Wang,&nbsp;Yun Zhou,&nbsp;Yunwei Zhang,&nbsp;Jiaqiang Sun","doi":"10.1111/nph.70556","DOIUrl":"10.1111/nph.70556","url":null,"abstract":"&lt;p&gt;Bread wheat (&lt;i&gt;Triticum aestivum&lt;/i&gt; L.) is a staple crop world-wide, contributing to &lt;i&gt;c&lt;/i&gt;. 20% of human calories and protein consumption (Braun &lt;i&gt;et al&lt;/i&gt;., &lt;span&gt;2010&lt;/span&gt;; Giraldo &lt;i&gt;et al&lt;/i&gt;., &lt;span&gt;2019&lt;/span&gt;; Xiao &lt;i&gt;et al&lt;/i&gt;., &lt;span&gt;2022&lt;/span&gt;). The intensive application of nitrogen fertilizer boosts crop yield but causes serious detrimental effects on ecosystems (Liu &lt;i&gt;et al&lt;/i&gt;., &lt;span&gt;2022&lt;/span&gt;). It is therefore crucial to breed low-nitrogen-tolerant crop varieties to achieve a stable yield under low-nitrogen conditions (Li &lt;i&gt;et al&lt;/i&gt;., &lt;span&gt;2018&lt;/span&gt;; Wu &lt;i&gt;et al&lt;/i&gt;., &lt;span&gt;2020&lt;/span&gt;; Liu &lt;i&gt;et al&lt;/i&gt;., &lt;span&gt;2021&lt;/span&gt;; Song &lt;i&gt;et al&lt;/i&gt;., &lt;span&gt;2023&lt;/span&gt;). Nitrate is the primary nitrogen source and also a signaling molecule for the plants grown in aerobic soil. The &lt;i&gt;Arabidopsis&lt;/i&gt; nitrate-coupled Ca&lt;sup&gt;2+&lt;/sup&gt;-sensor protein kinases (CPKs) can phosphorylate the NIN-LIKE PROTEIN 7 (NLP7) transcription factor, acting as a master regulator that orchestrates the primary nitrate responses to promote its persistent nuclear localization (Liu &lt;i&gt;et al&lt;/i&gt;., &lt;span&gt;2017&lt;/span&gt;). A recent study demonstrated that the NLP7 transcription factor is a plant nitrate sensor (Liu &lt;i&gt;et al&lt;/i&gt;., &lt;span&gt;2022&lt;/span&gt;).&lt;/p&gt;&lt;p&gt;Nitrogen deficiency usually causes leaf senescence of plants (Cheng &lt;i&gt;et al&lt;/i&gt;., &lt;span&gt;2023&lt;/span&gt;). We previously cloned a gain-of-function allele of the GSK3/SHAGGY-like kinase-encoding gene &lt;i&gt;TaGSK3&lt;/i&gt; in wheat, which causes the dark-green leaf and compact plant architecture phenotypes (Dong &lt;i&gt;et al&lt;/i&gt;., &lt;span&gt;2023&lt;/span&gt;). Here, we sought to investigate the effect of TaGSK3 on nitrogen deficiency-induced leaf senescence in wheat. To determine the potential effect of TaGSK3 on nitrogen starvation responses in wheat, the modern cultivar YZ4110 and the gain-of-function mutant &lt;i&gt;Tagsk3&lt;/i&gt; (&lt;i&gt;Tagsk3&lt;/i&gt;&lt;sup&gt;&lt;i&gt;E286K&lt;/i&gt;&lt;/sup&gt;) in the YZ4110 background were grown under normal nitrogen (2 mM KNO&lt;sub&gt;3&lt;/sub&gt;, Normal N) and low-nitrogen (0.2 mM KNO&lt;sub&gt;3&lt;/sub&gt;, Low N) conditions, respectively (Fig. 1a). The results showed that the gain-of-function mutant &lt;i&gt;Tagsk3&lt;/i&gt;&lt;sup&gt;&lt;i&gt;E286K&lt;/i&gt;&lt;/sup&gt; exhibited an attenuated low-nitrogen-induced leaf senescence phenotype compared with YZ4110 (Fig. 1a). Consistently, the Chl content of YZ4110 was markedly reduced by &lt;i&gt;c&lt;/i&gt;. 59% after low-nitrogen treatment, whereas this reduction in the &lt;i&gt;Tagsk3&lt;/i&gt;&lt;sup&gt;&lt;i&gt;E286K&lt;/i&gt;&lt;/sup&gt; mutant was &lt;i&gt;c&lt;/i&gt;. 42% (Fig. 1b). Similarly, the overexpression transgenic plants of TaGSK3&lt;sup&gt;E285K&lt;/sup&gt; (a gain-of-function mutated protein form of TaGSK3) in the modern cultivar KN199 background also exhibited an attenuated low-nitrogen-induced leaf senescence phenotype compared with KN199 (Fig. 1a). The Chl content of KN199 was markedly reduced by &lt;i&gt;c&lt;/i&gt;. 63% under low-nitrogen conditions, whereas this reduction in the &lt;i&gt;TaGSK3&lt;/i&gt;&lt;sup&gt;&lt;i&gt;E285K&lt;/i&gt;&lt;/sup&gt; &lt;i&gt;OE&lt;/i&gt; transgenic plants was only &lt;i&gt;c&lt;/i&gt;. 38% (Fig. 1b). Moreover, the","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"248 3","pages":"1111-1115"},"PeriodicalIF":8.1,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://nph.onlinelibrary.wiley.com/doi/epdf/10.1111/nph.70556","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144995156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The miR169z‐NF‐YA5‐GPDHc1 module improves drought tolerance by increasing NAD+ levels to inhibit ROS production in Populus","authors":"Qing Li, Sen Meng, Yangyan Zhou, Huawei Pi, Quanzheng Yun, Jie Wang, Lingyun Chen, Yue Zhang, Chao Shen","doi":"10.1111/nph.70536","DOIUrl":"https://doi.org/10.1111/nph.70536","url":null,"abstract":"Summary<jats:list list-type=\"bullet\"> <jats:list-item>The microRNA169 (miR169) family and NF‐YA transcription factors (TFs) are crucial for drought stress responses. However, the mechanisms by which these factors regulate reactive oxygen species (ROS) homeostasis under drought conditions remain inadequately characterized in <jats:italic>Populus</jats:italic>.</jats:list-item> <jats:list-item>Here, we identified an NF‐YA TF, <jats:italic>PagNF‐YA5</jats:italic>, from hybrid poplar 84 K (<jats:italic>Populus alba</jats:italic> × <jats:italic>Populus glandulosa</jats:italic>). Knockout of <jats:italic>PagNF‐YA5</jats:italic> reduced drought tolerance in transgenic poplars, while its overexpression enhanced tolerance.</jats:list-item> <jats:list-item>Tobacco transient co‐expression, 5′ RACE, and dual‐luciferase reporter assays confirmed that miR169z specifically cleaved <jats:italic>PagNF‐YA5</jats:italic> transcripts. Overexpressing <jats:italic>miR169z</jats:italic> decreased drought tolerance in transgenic poplars, whereas repressing its expression using short tandem target mimics improved tolerance. Transcriptomic and biochemical analyses revealed that NF‐YA5 directly activates <jats:italic>glycerol‐3‐phosphate dehydrogenase 1</jats:italic> (<jats:italic>PagGPDHc1</jats:italic>) expression. <jats:italic>PagGPDHc1</jats:italic> upregulation elevates NAD<jats:sup>+</jats:sup> levels, thereby inhibiting ROS production and enhancing drought tolerance. Conversely, <jats:italic>gpdhc1</jats:italic>‐knockout poplars displayed opposing phenotypic effects.</jats:list-item> <jats:list-item>Collectively, this study elucidates a molecular mechanism by which the miR169z‐NF‐YA5‐GPDHc1 module enhances drought tolerance through NAD<jats:sup>+</jats:sup>‐mediated inhibit ROS production in <jats:italic>Populus</jats:italic>. These findings advance our understanding of drought adaptation mechanisms in woody plants and establish a molecular framework for the genetic improvement of forest trees under water deficit conditions.</jats:list-item> </jats:list>","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"22 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144995402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trait-based island biogeography as a tool for studying future ecological communities.","authors":"Julian Schrader","doi":"10.1111/nph.70551","DOIUrl":"https://doi.org/10.1111/nph.70551","url":null,"abstract":"Understanding the future of ecological communities under global change is among the most pressing challenges in plant ecology. Islands, with their reduced species diversity and clear boundaries, have been central in developing ecological theories and have served as valuable ecological models. But islands are also important in themselves, supporting unique diversity and acting as species refugia. This Tansley insight first discusses recent advances in island research with a focus on new theories linking functional traits to plant community assembly and then highlights implications for community assembly and conservation in response to global change. Understanding how plant traits respond to changing environmental conditions is critical for predicting the future of island floras and devising effective management strategies.","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"33 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144995720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Foliar spectral signatures reveal adaptive divergence in live oaks (Quercus section Virentes) across species and environmental niches","authors":"Mariana S. Hernández-Leal,&nbsp;J. Antonio Guzmán Q.,&nbsp;Antonio González-Rodríguez,&nbsp;Jeannine Cavender-Bares","doi":"10.1111/nph.70424","DOIUrl":"10.1111/nph.70424","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"248 1","pages":"370-388"},"PeriodicalIF":8.1,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://nph.onlinelibrary.wiley.com/doi/epdf/10.1111/nph.70424","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144935043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Climate warming reshapes seasonal flowering but stabilizes species interactions in a Tibetan alpine grassland","authors":"Juanjuan Zhang, Jianbin Wang, Jiumei Ma, Chunyan Lu, Shijie Ning, Huimin Zhou, Lijuan Sun, Chao Song, Xin Jing, Zhenhua Zhang, Huiying Liu, Jin‐Sheng He, Hao Wang","doi":"10.1111/nph.70537","DOIUrl":"https://doi.org/10.1111/nph.70537","url":null,"abstract":"Summary<jats:list list-type=\"bullet\"> <jats:list-item>Climate warming commonly drives asymmetric shifts in flowering phenology among species, potentially disrupting plant–plant interactions and threatening ecosystem stability. However, the mechanisms driving these species‐specific phenological responses, and the extent to which resulting asynchrony destabilizes interspecific interactions, remain poorly understood.</jats:list-item> <jats:list-item>Using a 3‐yr <jats:italic>in situ</jats:italic> warming experiment in a Tibetan alpine grassland, we monitored seasonal flowering patterns of 29 species and quantified interaction potentials across 812 species pairs from their flowering‐time overlap.</jats:list-item> <jats:list-item>Warming advanced the start of the flowering season in 75.9% of species and the end of the flowering season in 69.0%, with greater phenological shifts in late‐ than early‐flowering species, in insect‐ than wind‐pollinated species, and with more similar shifts in closely related species than in distantly related species. By contrast, warming significantly altered the interaction potential in only 6.8% of species pairs (55/812), independent of the pairwise phylogenetic distance.</jats:list-item> <jats:list-item>Our results advance understanding of species‐specific phenological shifts in alpine grasslands and reveal that warming may induce substantial phenological reassembly without necessarily disrupting plant–plant interactions, suggesting resilience of ecological networks to phenological change.</jats:list-item> </jats:list>","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"58 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fungicide effects on wild plants: insights from a global meta-analysis","authors":"Xiaoyang Song,&nbsp;Richard T. Corlett,&nbsp;Jie Yang,&nbsp;Matthew Scott Luskin","doi":"10.1111/nph.70530","DOIUrl":"10.1111/nph.70530","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 </p><ul>\u0000 \u0000 <li>Many studies have investigated plant–pathogen interactions by testing whether fungicides affect plant survival, growth, biomass, and/or diversity.</li>\u0000 \u0000 <li>Here, we synthesize these studies using a global meta-analysis of 369 experiments from 62 papers that compared plants treated with fungicide to untreated controls.</li>\u0000 \u0000 <li>Overall, fungicide increased the survival of native plant species and community biomass but decreased diversity, mirroring the effects of fencing out vertebrate herbivores. There was no overall effect on plant growth. However, analyses of subsets of the data revealed a more varied and complex picture, with few consistent results. Strong geographical biases in sampling and small sample sizes for many combinations of variables make it difficult to distinguish between alternative explanations for this variation in fungicide effects.</li>\u0000 \u0000 <li>The results, overall, are largely consistent with a role for fungal pathogens in the maintenance of community diversity, but not with the latitudinal biotic interaction hypothesis. Future studies should aim to fill the gaps in the geographical spread of studies, standardize the methods as far as possible, and use molecular techniques to characterize the impacts of fungicide treatments on both target and nontarget organisms.</li>\u0000 </ul>\u0000 </div>","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"248 3","pages":"1491-1500"},"PeriodicalIF":8.1,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A U-box E3 ubiquitin ligase CmPUB15 targets CmMYB73 to regulate anthocyanin biosynthesis in response to low temperatures in chrysanthemum","authors":"Zhiqiang Geng,&nbsp;Lijie Zhou,&nbsp;Yiguang Wang,&nbsp;Yuxi Wang,&nbsp;Zhenjie Shi,&nbsp;Daojin Sun,&nbsp;Yuhua He,&nbsp;Haibin Wang,&nbsp;Jiafu Jiang,&nbsp;Sumei Chen,&nbsp;Fadi Chen","doi":"10.1111/nph.70513","DOIUrl":"10.1111/nph.70513","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 </p><ul>\u0000 \u0000 <li>During annual chrysanthemum production, low temperatures (10°C, the same below) can promote anthocyanin accumulation in petals. However, the specific mechanism behind this phenomenon remains unclear.</li>\u0000 \u0000 <li>In this study, we identified CmMYB73, an SG22 R2R3-MYB transcription factor, as a negative regulator of anthocyanin biosynthesis in chrysanthemum. CmMYB73 responds to low temperatures in opposite ways at the transcriptional and protein levels.</li>\u0000 \u0000 <li>Further investigations revealed that CmPUB15, a U-box E3 ubiquitin ligase, interacts with CmMYB73 and is significantly upregulated by low temperatures at the transcriptional level. CmMYB73 is ubiquitinated by CmPUB15 and subsequently degraded via the 26S proteasome pathway, leading to the accumulation of anthocyanin in chrysanthemum petals.</li>\u0000 \u0000 <li>Our findings outline a novel pathway for anthocyanin biosynthesis under low temperatures and provide insights for molecular breeding efforts to enhance chrysanthemum flower color.</li>\u0000 </ul>\u0000 </div>","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"248 3","pages":"1304-1320"},"PeriodicalIF":8.1,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}