New Phytologist最新文献_第5页

Nonuniform temperature and light relationships of moss-associated nitrogen fixation across climates. 不同气候条件下苔藓相关固氮的非均匀温度和光关系。

IF 8.1 1区生物学

New Phytologist Pub Date : 2026-10-01 Epub Date: 2026-08-03 DOI: 10.1111/nph.71472

Yunyao Ma, Kathrin Rousk

{"title":"Nonuniform temperature and light relationships of moss-associated nitrogen fixation across climates.","authors":"Yunyao Ma, Kathrin Rousk","doi":"10.1111/nph.71472","DOIUrl":"10.1111/nph.71472","url":null,"abstract":"Nitrogen (N) fixation by moss-associated cyanobacteria is a key N source in terrestrial ecosystems and thereby a critical limiting factor for ecosystem productivity. However, the responses of this process to variation in key abiotic factors are unknown. In particular, the lack of knowledge on how these responses vary across climates limits our ability to estimate and predict the global importance of this key ecosystem function. We established N fixation response curves in dominant mosses across five ecosystems with different climates, from arctic to tropical forests, to light (0-1500 μmol m-2 s-1), moisture (0-100% moss moisture), and temperature (< 10-40°C), and derived key physiological traits from these. Relationships between N fixation and both light and temperature varied across climatically contrasting ecosystems, with light optima of c. 500-800 μmol m-2 s-1 and temperature optima of c. 28-33°C. By contrast, the amount of water required to sustain N fixation was similar across ecosystems, regardless of local humidity. Our results highlight that microbial functional responses are not uniform across climates. The here quantified relationships between N fixation and key abiotic factors across climatically contrasting ecosystems provide the foundation for integrating moss-associated N fixation into vegetation models.","PeriodicalId":48887,"journal":{"name":"New Phytologist","volume":" ","pages":"276-291"},"PeriodicalIF":8.1,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13539968/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148671095","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}

引用次数: 0

Stepwise evolution of the developmental and symbiotic functions of DELLA in land plants. 陆生植物DELLA发育与共生功能的逐步演化。

IF 8.1 1区生物学

New Phytologist Pub Date : 2026-09-28 DOI: 10.1111/nph.71597

Katharina Melkonian, Tifenn Pellen, Katinka Bünger, Océane Thiercelin, Aurélie Le Ru, Mélanie K Rich, Matheus E Bianconi, Jean Keller, Maxime Bonhomme, Pierre-Marc Delaux

引用次数: 0

SUMOylation of chloroplast GrpE homolog 1 regulates chloroplast biogenesis through maintaining TIC complex stability. 叶绿体GrpE同源物1的summoylation通过维持TIC复合物的稳定性来调节叶绿体的生物发生。

IF 8.1 1区生物学

New Phytologist Pub Date : 2026-09-28 DOI: 10.1111/nph.71604

Caijuan Wang, Wen Liu, Jie Zhao, Wenxiong Lin, Yalin Zhang, Xiao-Ting Zheng, Chengwei Yang

{"title":"SUMOylation of chloroplast GrpE homolog 1 regulates chloroplast biogenesis through maintaining TIC complex stability.","authors":"Caijuan Wang, Wen Liu, Jie Zhao, Wenxiong Lin, Yalin Zhang, Xiao-Ting Zheng, Chengwei Yang","doi":"10.1111/nph.71604","DOIUrl":"https://doi.org/10.1111/nph.71604","url":null,"abstract":"In Arabidopsis, chloroplast protein import relies on the stromal cpHsp70 motor system, whose nucleotide-exchange factor CGE1 is indispensable, yet its regulatory mechanism remains poorly defined. We integrated bioinformatics prediction with in vitro and in vivo SUMOylation assays, biochemical analyses, confocal microscopy, and genetic complementation to elucidate the functional impact of CGE1 SUMOylation in chloroplast development. CGE1 undergoes SUMO3 conjugation, and Lys-214 is required for efficient CGE1 SUMOylation. The SUMOylation-defective variant CGE1K214R retained stromal localization but caused marked chlorosis of emerging leaves, reduced photosynthetic efficiency, and impaired chloroplast development. Moreover, import of cytosol-synthesized preproteins is compromised in CGE1K214R-complemented plants, accompanied by decreased abundance of TIC40 and TIC110. Loss of SUMOylation simultaneously strengthens the CGE1-cpHsp70-1 and CGE1-TIC40 interactions, and overexpression of either cpHsp70-1 or TIC40 in CGE1K214R-complemented plants restores TIC40 and/or TIC110 levels and the photosynthetic phenotype. In conclusion, these findings reveal that SUMOylation of CGE1 plays an important role in regulating TIC complex abundance and precursor import efficiency through cpHsp70- and TIC40-related routes. This study uncovers a SUMOylation-mediated regulatory layer that fine-tunes chloroplast biogenesis.","PeriodicalId":48887,"journal":{"name":"New Phytologist","volume":" ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149070348","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}

引用次数: 0

Unlocking underutilized diversity for the next generation of oat improvement. 为下一代燕麦改良解锁未充分利用的多样性。

IF 8.1 1区生物学

New Phytologist Pub Date : 2026-09-27 DOI: 10.1111/nph.71610

Yu Guo, Martin Mascher

引用次数: 0

Mandy L. Slate. 曼迪·l·斯莱特。

IF 8.1 1区生物学

New Phytologist Pub Date : 2026-09-27 DOI: 10.1111/nph.71611

引用次数: 0

β-Carbonic anhydrases integrate CO₂ and light cues to coordinate photosynthesis in tomato. β-碳酸酐酶整合二氧化碳和光信号来协调番茄的光合作用。

IF 8.1 1区生物学

New Phytologist Pub Date : 2026-09-17 DOI: 10.1111/nph.71578

Anran Wang, Chenxin Yue, Xiao Liang, Haiming Ying, Jianrong Lv, Shujun Shao, Hongxin Wu, Minghan Xu, Yang Liu, Xiaopeng Guo, Wei Yuan, Christine H Foyer, Kai Shi

{"title":"β-Carbonic anhydrases integrate CO2 and light cues to coordinate photosynthesis in tomato.","authors":"Anran Wang, Chenxin Yue, Xiao Liang, Haiming Ying, Jianrong Lv, Shujun Shao, Hongxin Wu, Minghan Xu, Yang Liu, Xiaopeng Guo, Wei Yuan, Christine H Foyer, Kai Shi","doi":"10.1111/nph.71578","DOIUrl":"https://doi.org/10.1111/nph.71578","url":null,"abstract":"Optimization of photosynthesis requires precise coordination between electron transport and CO2 assimilation, but how plants maintain this coordination under suboptimal CO2 and light conditions remains poorly understood. Here, we identify two tomato (Solanum lycopersicum) β-carbonic anhydrases (βCAs) responsive to deficient CO2. Although both are required for biomass accumulation and efficient photosynthesis, the chloroplast βCA1 does not directly participate in carbon assimilation but instead specifically coordinates photosystem performance and leaf internal structure. This role is distinct from the cytosol/plasma-membrane βCA2 that supports carbon assimilation and overall growth. We demonstrate that βCA1 buffers light-induced stromal pH changes, thereby optimizing proton motive force (pmf) and stabilizing photosystem II performance. The absence of βCA1 increases photosystem sensitivity to high-light intensities, resulting in increased photoprotective responses and adaptive thylakoid re-organization when environmental CO2 becomes limiting relative to irradiance. Our findings establish chloroplast βCA1 as a key integrator of CO2 and light cues that optimizes photosystem performance through modulation of pmf partitioning and reveal stromal pH regulation as a previously unrecognized mechanism for optimizing photosynthesis under suboptimal CO2 and light conditions.","PeriodicalId":48887,"journal":{"name":"New Phytologist","volume":" ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148992076","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}

引用次数: 0

Linking drought strategy to climate-of-origin in a widespread C4 grass: hydraulic traits, xylem anatomy and stomatal behaviour in Themeda triandra. 将干旱策略与广泛分布的C4草的起源气候联系起来：水特性、木质部解剖和气孔行为。

IF 8.1 1区生物学

New Phytologist Pub Date : 2026-09-17 DOI: 10.1111/nph.71588

Vinod Jacob, Christopher J Blackman, Brendan Choat, Brian J Atwell, Eloise Foo, Alejandro Correa-Lozano, Travis G Britton, Emma E Sumner, Ian J Wright

{"title":"Linking drought strategy to climate-of-origin in a widespread C4 grass: hydraulic traits, xylem anatomy and stomatal behaviour in Themeda triandra.","authors":"Vinod Jacob, Christopher J Blackman, Brendan Choat, Brian J Atwell, Eloise Foo, Alejandro Correa-Lozano, Travis G Britton, Emma E Sumner, Ian J Wright","doi":"10.1111/nph.71588","DOIUrl":"https://doi.org/10.1111/nph.71588","url":null,"abstract":"Hydraulic, stomatal, and anatomical traits strongly influence plant performance under drought, but the extent to which these trait-types are coordinated and relate to climate-of-origin remains vastly underexplored in herbaceous species relative to woody plants. We quantified variation in these traits in eight populations of Themeda triandra selected from contrasting summer temperature and precipitation regimes across Australia, grown under common conditions and exposed to drought. Trait-climate-of-origin relationships were quantified using linear mixed models. Plants from drier climates exhibited lower stomatal conductance, earlier drought-induced stomatal closure, and higher stomatal safety margins. Plants from warmer climates exhibited greater embolism resistance and hydraulic conductance, with wider vessels and lower vein density, suggesting adaptation to high evaporative demand; embolism resistance was unrelated to precipitation. These findings reveal, for the first time in any grass species, the intraspecific coordination of xylem embolism resistance, stomatal regulation and xylem anatomy across a climate gradient, identifying distinct hydraulic strategies: conservative water use and dehydration avoidance in drier climates, and embolism resistance and hydraulic efficiency in warmer climates. These findings provide critical new insights into the adaptive strategies that facilitate success of this widespread C4 grass in contrasting climates, with direct implications for understanding grassland responses to climate change.","PeriodicalId":48887,"journal":{"name":"New Phytologist","volume":" ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148992160","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}

引用次数: 0

Duckweeds under salt stress: a meta-analysis of growth inhibition in relation to morphological and physiological traits and a systematic review of molecular responses. 盐胁迫下的浮萍：生长抑制与形态和生理性状相关的荟萃分析和分子反应的系统综述。

IF 8.1 1区生物学

New Phytologist Pub Date : 2026-09-17 DOI: 10.1111/nph.71591

Saimon Branco Bueno, Alice Pita-Barbosa, Ana Paula Roschildt, Daniel Burd Villanova, Janaina Cardozo de Mello, Alex Lindor, Tanise Luísa Sausen, Junior Borella

{"title":"Duckweeds under salt stress: a meta-analysis of growth inhibition in relation to morphological and physiological traits and a systematic review of molecular responses.","authors":"Saimon Branco Bueno, Alice Pita-Barbosa, Ana Paula Roschildt, Daniel Burd Villanova, Janaina Cardozo de Mello, Alex Lindor, Tanise Luísa Sausen, Junior Borella","doi":"10.1111/nph.71591","DOIUrl":"https://doi.org/10.1111/nph.71591","url":null,"abstract":"Salinity is one of the main environmental factors limiting the performance of duckweeds and despite growing ecological and biotechnological interest in these macrophytes, there is a lack of quantitative analyses of their responses to sodium chloride. To address this gap, we conducted a meta-analysis and a systematic review of 38 articles to quantify the effects of NaCl on growth, photosynthetic pigments, carbohydrate metabolism, osmotic adjustment, ionic homeostasis, oxidative stress, antioxidant defense and molecular responses in duckweeds. NaCl consistently reduced growth-related traits and photosynthetic pigments while increasing proline, oxidative stress, Na+ accumulation, K+ depletion and altered starch metabolism. Antioxidant responses varied among enzymes, with SOD, APX, GPX and GR generally showing positive responses under saline conditions. Species-specific analyses identified Spirodela polyrhiza and Lemna minor as having greater bioenergetic potential, whereas S. polyrhiza and Landoltia punctata showed lower ionic disturbances and stronger osmoprotective responses. Available molecular studies indicate the involvement of ABA-, ROS- and Ca2+-mediated signaling pathways, and individual studies highlight Ca2+ and K+ supplementation as promising strategies to enhance salt tolerance. Overall, duckweed salinity tolerance emerges from the coordinated interaction of ionic, osmotic and redox regulation, providing a mechanistic framework for future applications in saline environments and biomass-based technologies.","PeriodicalId":48887,"journal":{"name":"New Phytologist","volume":" ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148992118","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}

引用次数: 0

Nondefense functions of plant specialized metabolites: ecological phenomena, molecular mechanisms, and evolutionary implications. 植物特化代谢物的非防御功能：生态现象、分子机制和进化意义。

IF 8.1 1区生物学

New Phytologist Pub Date : 2026-09-17 DOI: 10.1111/nph.71539

Lauren N Carley

引用次数: 0

Proprioception drives tension wood formation for autotropic straightening and postural control in trees. 本体感觉驱动张力木材的形成，用于树木的自向矫直和姿势控制。

IF 8.1 1区生物学

New Phytologist Pub Date : 2026-09-02 DOI: 10.1111/nph.71238

Alexandre Caulus, Félix P Hartmann, Éric Badel, Stéphane Ploquin, Nicole Brunel-Michac, Julien Ruelle, Mélanie Decourteix, Bruno Moulia

{"title":"Proprioception drives tension wood formation for autotropic straightening and postural control in trees.","authors":"Alexandre Caulus, Félix P Hartmann, Éric Badel, Stéphane Ploquin, Nicole Brunel-Michac, Julien Ruelle, Mélanie Decourteix, Bruno Moulia","doi":"10.1111/nph.71238","DOIUrl":"https://doi.org/10.1111/nph.71238","url":null,"abstract":"Postural control in plant shoots relies on gravi- and photo- tropisms, driven by angular sensing and actuated by differential growth or reaction wood formation (tension wood in dicots). Control theory and kinematical models predict that posture stabilization additionally requires active counter-curving. This led to the hypothesis that plants actively straighten through proprioception (curvature sensing) driving autotropic actuation. However, passive springback can be involved, especially in woody stems, and direct conclusive experimental evidence for proprioception-driven autotropism has been lacking. To assess this hypothesis, we designed a novel experimental setup, allowing us to suspend phototropic and gravitropic sensing on demand along the tropic movement. We then quantified stem movement and tension wood formation - an indicator of actuation - during curving and counter-curving in poplar stems (Populus tremula × alba). We show that counter-curving results from active tension wood formation on the convex side of curved stems until straightness is recovered. Quantitative analysis revealed the curvature-dependent control law governing this response and allowed estimation of proprioceptive sensitivity. Our results establish that reaction wood formation is driven by the balance between graviperceptive and proprioceptive feedbacks, revising our textbook view of tension wood formation. They provide direct evidence that proprioception-driven autotropism is the key process for active straightening in trees.","PeriodicalId":48887,"journal":{"name":"New Phytologist","volume":" ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148876196","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}

引用次数: 0