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Engineered TnpB boosts virus-mediated editing. 工程TnpB促进病毒介导的编辑。
IF 13.6 1区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-03-03 DOI: 10.1038/s41477-026-02251-6
Manman Hu, Degao Liu
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引用次数: 0
High-frequency biparental inheritance of plant mitochondria upon chilling stress and loss of a genome-degrading nuclease. 低温胁迫下植物线粒体的高频双亲本遗传和基因组降解核酸酶的缺失。
IF 18 1区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-03-03 DOI: 10.1038/s41477-026-02242-7
Enrique Gonzalez-Duran,Zizhen Liang,Joachim Forner,Dennis Kleinschmidt,Weiqi Wang,Liwen Jiang,Kin Pan Chung,Ralph Bock
Mitochondria are inherited maternally in the vast majority of eukaryotes. Occasional transmission of paternal mitochondria (paternal leakage) can lead to heterochondriomy and recombination between maternal and paternal mitochondrial genomes. Despite its potential physiological and evolutionary consequences, the extent of paternal leakage and the cellular processes governing mitochondrial inheritance remain largely unknown. Here we have established a robust genetic screen to detect paternal mitochondrial inheritance in tobacco (Nicotiana tabacum). Our data reveal an unexpectedly high paternal transmission frequency of 0.18%, which increased markedly to 7.34% when the organellar exonuclease DPD1 was disrupted and pollen development occurred at low temperature. Notably, paternally transmitted mitochondria restored growth, development and male fertility in progeny that inherited dysfunctional mitochondria from the maternal parent. Together, our findings uncover molecular mechanisms underlying maternal mitochondrial inheritance, and highlight the potential of biparental transmission to rescue mitochondrial function and generate novel mitochondrial genotypes through recombination.
绝大多数真核生物的线粒体都是母系遗传的。偶有父系线粒体的传递(父系渗漏)可导致异线粒体和母系和父系线粒体基因组之间的重组。尽管其潜在的生理和进化后果,父系泄漏的程度和控制线粒体遗传的细胞过程在很大程度上仍然未知。在这里,我们已经建立了一个强大的基因筛选检测父系线粒体遗传烟草(Nicotiana tabacum)。结果表明,当细胞器外切酶DPD1被破坏,花粉在低温下发育时,父本传代频率达到了7.34%。值得注意的是,父系遗传的线粒体恢复了从母系遗传的线粒体功能失调的后代的生长、发育和雄性生育能力。总之,我们的研究结果揭示了母系线粒体遗传的分子机制,并强调了双亲本遗传在挽救线粒体功能和通过重组产生新的线粒体基因型方面的潜力。
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引用次数: 0
Publisher Correction: Motif-based substrate mapping of the receptor-like cytoplasmic kinase BIK1 reveals novel components and regulatory nodes of plant immunity. 基于基序的受体样细胞质激酶BIK1的底物定位揭示了植物免疫的新成分和调节节点。
IF 13.6 1区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-03-03 DOI: 10.1038/s41477-026-02255-2
Ryan Toth, Sera Choi, Marie Le Naour-Vernet, Florian Schwanke, Jared L Johnson, Estee E Tee, Tomer M Yaron-Barir, Eleanor Khochaba, Paul Derbyshire, Anka Colo, Philipp Köster, Emily M Huntsman, Laura Herold, Yoonyoung Lee, Álvaro D Fernández-Fernández, Hee-Kyung Ahn, Julian Dindas, Marta Bjornson, Jack Rhodes, Beibei Song, Weibing Wang, Marija Smokvarska, Emmanuelle M Bayer, Jian-Min Zhou, Lewis C Cantley, Jonathan D G Jones, Kyle W Bender, Frank L H Menke, Christine Faulkner, Cyril Zipfel, Thomas A DeFalco
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引用次数: 0
Integrated Metabolomic and Transcriptomic Analyses Reveal the Coumarin Biosynthesis Pathway and Key Regulatory Genes in the Pericarp of Zanthoxylum 综合代谢组学和转录组学分析揭示花椒果皮香豆素合成途径和关键调控基因
1区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-03-02 DOI: 10.3390/plants15050769
Shengqun Chen, Lianwen Shen, Yajun Zeng, Shijing Feng, Hong Luo, Gang Wang
Coumarins in the pericarp of Zanthoxylum contribute to the characteristic numbing–aromatic flavor and are associated with diverse bioactivities. To characterize coumarin divergence between two Zanthoxylum materials, mature pericarps of Dahongpao Z. bungeanum (red Sichuan pepper) and Z. planispinum var. dingtanensis (green Sichuan pepper) were analyzed by widely targeted UPLC–ESI–MS/MS metabolomics integrated with transcriptome sequencing. This approach enabled joint profiling of metabolites and transcripts to identify genes associated with material-specific coumarin accumulation. Across the two materials, 583 metabolites were detected, with flavonoids, phenolic acids, and alkaloids as the predominant classes. Among these, 24 coumarins were identified, and most showed significantly higher abundance in green Sichuan pepper than in red Sichuan pepper. Pathway enrichment analysis indicated that differentially accumulated coumarins were mainly associated with the phenylpropanoid biosynthesis pathway, consistent with coordinated metabolic and transcriptional regulation. The integration of metabolite abundance with gene expression patterns identified 56 candidate genes strongly correlated with scopoletin and scopolin accumulation. To evaluate functional relevance, CCoAOMT, COMT, and F6H were cloned and transiently overexpressed in Nicotiana benthamiana. Transient expression assays showed that overexpression of each gene increased scopoletin and scopolin, supporting their involvement in coumarin biosynthesis. Collectively, these results clarify molecular determinants of coumarin variation between the two materials and highlight candidate genes for quality improvement and metabolic engineering.
花椒果皮中的香豆素构成了花椒特有的麻香风味,并具有多种生物活性。为研究两种花椒材料香豆素差异,采用广泛靶向UPLC-ESI-MS /MS代谢组学和转录组测序技术对大红袍Z. bungeanum(红花椒)和Z. planispinum var. dingtanensis(绿花椒)成熟果皮进行了分析。这种方法能够联合分析代谢产物和转录物,以鉴定与物质特异性香豆素积累相关的基因。在两种材料中检测到583种代谢物,其中黄酮类、酚酸类和生物碱类为优势类。其中,鉴定出24种香豆素,其中大部分在绿花椒中的丰度显著高于红花椒。途径富集分析表明,差异积累香豆素主要与苯丙素生物合成途径有关,符合代谢和转录协调调节。代谢产物丰度与基因表达模式的整合鉴定出56个与东莨菪碱和东莨菪碱积累密切相关的候选基因。为了评估功能相关性,我们克隆了CCoAOMT、COMT和F6H,并在烟叶中短暂过表达。瞬时表达分析显示,过表达的每个基因增加东莨菪素和东莨菪碱,支持他们参与香豆素的生物合成。总的来说,这些结果阐明了香豆素在两种材料之间差异的分子决定因素,并突出了质量改进和代谢工程的候选基因。
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引用次数: 0
Rooting for heterosis 杂种优势生根
IF 18 1区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-25 DOI: 10.1038/s41477-026-02249-0
C. Robin Buell
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引用次数: 0
Photorespiration is linked to DNA methylation by formate as a one-carbon source 光呼吸与DNA甲基化有关,甲酸盐是一个单碳源
IF 18 1区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-25 DOI: 10.1038/s41477-026-02222-x
Valentin Hankofer, Andrea Ghirardo, Lisa Obermaier, Gernot Poschet, Jisha Suresh Kumar, Inonge Gross, Jörg Durner, Michael Rychlik, Markus Wirtz, Rüdiger Hell, Jörg-Peter Schnitzler, Martin Groth
Photorespiration is a costly cellular process that reduces photosynthetic efficiency. While mitigating photorespiratory losses could boost crop yields, the interconnection of photorespiration with other processes is increasingly recognized. Its high carbon turnover generates mitochondrial one-carbon (C 1 ) metabolites, including formate, but their contribution to cellular C 1 metabolism has remained unclear. DNA methylation is an important epigenetic modification that depends on methyl groups provided by folate-mediated C 1 metabolism. Here we show that photorespiration supplies C 1 units for DNA methylation in Arabidopsis . We demonstrate that carbon from formate is incorporated into 5-methylcytosine through the C 1 -tetrahydrofolate synthase pathway, which operates predominantly during the day. Elevated CO 2 that suppresses photorespiration alters the methylome, especially when the serine-derived C 1 supply, which compensates for a blocked formate-derived supply, is compromised. These findings establish a metabolic link between photorespiration and epigenome stability and provide a framework for understanding methylome dynamics under rising CO 2 levels and other environmental influences on photorespiration.
光呼吸是一个代价高昂的细胞过程,它会降低光合作用的效率。虽然减轻光呼吸损失可以提高作物产量,但人们越来越认识到光呼吸与其他过程的相互联系。其高碳周转率产生线粒体单碳(c1)代谢物,包括甲酸,但它们对细胞c1代谢的贡献尚不清楚。DNA甲基化是一种重要的表观遗传修饰,依赖于叶酸介导的c1代谢提供的甲基。在这里,我们展示了光呼吸为拟南芥DNA甲基化提供c1单位。我们证明甲酸中的碳通过c1 -四氢叶酸合成酶途径并入5-甲基胞嘧啶,该途径主要在白天运作。升高的二氧化碳抑制光呼吸改变了甲基组,特别是当丝氨酸来源的c1供应受损时,它补偿了受阻的甲酸来源的供应。这些发现建立了光呼吸与表观基因组稳定性之间的代谢联系,并为理解二氧化碳水平上升和其他环境对光呼吸的影响下甲基组动力学提供了框架。
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引用次数: 0
Celebrating photosynthesis 庆祝光合作用
IF 13.6 1区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-23 DOI: 10.1038/s41477-026-02250-7
Photosynthesis is both an elegantly simple and dazzlingly complex process. The year 2026 marks anniversaries of the discoveries of both of these layers.
光合作用是一个既简单又复杂的过程。2026年是发现这两层的纪念日。
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引用次数: 0
The overlooked role of root water content in the root economics space. 根系含水量在根系经济空间中被忽视的作用。
IF 13.6 1区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-23 DOI: 10.1038/s41477-026-02232-9
Heng Li, Carlos P Carmona, Shuli Niu, Ian J Wright, Yong Zhou, Josep Peñuelas, Jordi Sardans, Zhiqiang Wang, Lei Deng, Jing Wang, Ruixuan Liu, Jiahao Tan, Ying Xin, Chengjin Chu, Heng Huang

Root traits are fundamental to plant survival, growth and adaptation to environmental changes. Despite increasing attention to the root economics space, a quantitative understanding of global patterns and key drivers of root trait variation remains elusive. By combining metabolic theory with global trait datasets, we reveal universal nonlinear relationships of five key root traits with root water content regardless of plant growth form or climate zone. Root water content emerges as a stronger predictor of growth-related root traits and shows a closer association with the conservation gradient than the widely considered root nitrogen, thereby better defining 'fast' resource acquisition strategies. Moreover, replacing nitrogen with tissue water content in analyses reveals a closer alignment of leaf and fine-root traits than expected. Our findings highlight general quantitative biotic and abiotic controls on plant trait variation, offering broader insights into plant economics strategies, community dynamics and ecosystem functioning under changing climate and resource availability.

根系性状是植物生存、生长和适应环境变化的基础。尽管对根系经济空间的关注越来越多,但对根系性状变异的全球模式和关键驱动因素的定量理解仍然难以捉摸。通过将代谢理论与全球性状数据集相结合,揭示了不论植物生长形态或气候区域,5个关键根系性状与根系含水量的普遍非线性关系。根含水量是根系生长相关性状的一个更强的预测因子,与广泛认为的根氮相比,它与保护梯度的关系更密切,从而更好地定义“快速”资源获取策略。此外,在分析中,用组织含水量代替氮含量揭示了叶片和细根性状比预期更接近的一致性。我们的研究结果强调了植物性状变异的一般定量生物和非生物控制,为气候和资源可用性变化下的植物经济学策略、群落动态和生态系统功能提供了更广泛的见解。
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引用次数: 0
High-efficiency, transgene-free plant genome editing by viral delivery of an engineered TnpB 高效,无转基因植物基因组编辑通过病毒传递工程TnpB
IF 18 1区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-20 DOI: 10.1038/s41477-026-02237-4
Ugrappa Nagalakshmi, Jorge E. Rodriguez, Thi Nguyen, Rachel F. Weissman, Brittney W. Thornton, Cynthia I. Terrace, David F. Savage, Savithramma P. Dinesh-Kumar
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引用次数: 0
A distorter–restorer system drives quantitative reproductive isolation in rice 扭曲-恢复系统驱动水稻数量生殖隔离
IF 18 1区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-19 DOI: 10.1038/s41477-026-02223-w
Yu Zhang, Ying Yang, Chuanlin Shi, Qiuhong Pu, Jiawu Zhou, Wenchuang He, Peng Xu, Qiang Xu, Fengyi Hu, Xuanchen Song, Xiaohan Jiang, Yonggang Lv, Liu He, Xianneng Deng, Lianguang Shang, Dayun Tao
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引用次数: 0
期刊
Nature Plants
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