Biological Sciences / Plant Biology -- New results matching your topic search. https://www.pnas.org/action/doSearch?af=R Proceedings of the National Academy of Sciences: Plant Biology Proceedings of the National Academy of Sciences en-US http://www.atypon.com/images/atypon_logo_small.gif http://www.atypon.com https://www.pnas.org/doi/abs/10.1073/pnas.2535316123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 20, May 2026. <br/>SignificanceMeiosis is an evolutionarily conserved process, in which chromosomes interact with each other and exchange parts. This behavior is distinct during organism’s development and requires activity of many specialized genes that must be turned on ... PAM1 regulates meiosis by coupling RNA processing to the chromosome axis doi:10.1073/pnas.2535316123 2026-05-13T07:00:00Z Qian DuMinghui WangChoon-Lin TiangMoira J. SheehanPaul AltendorfJu-Kyung YuOtto HudeczElisabeth RoitingerChung-Ju Rachel WangRobert BukowskiRobert B. MeeleyClint KoInna N. GolubovskayaWojciech P. PawlowskiaSection of Plant Biology, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853bBioinformatics Facility, Cornell University, Ithaca, NY 14853cSyngenta Biotechnology, Inc., Stanton, MN 55018dInstitute of Molecular Biotechnology, Vienna 1030, AustriaeInstitute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, TaiwanfPioneer Hi-Bred International, Inc.—A DuPont Company, Johnston, IA 50131gDepartment of Molecular and Cell Biology, University of California, Berkeley, CA 94720 Proceedings of the National Academy of Sciences 123 20 2026-05-19T07:00:00Z 2026-05-19T07:00:00Z 10.1073/pnas.2535316123 https://www.pnas.org/doi/abs/10.1073/pnas.2535316123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2603627123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 20, May 2026. <br/>SignificancePlants face hyperosmotic stress from drought, salinity, and cold, yet how they sense and rapidly respond to such stress has remained unclear. We show that B4-subgroup RAF kinases directly detect cellular hyperosmolarity through liquid–liquid ... Rapid sensing and relaying of cellular hyperosmotic stress signals via RAF–SnRK2 core condensates doi:10.1073/pnas.2603627123 2026-05-13T07:00:00Z Guting LiuZhen LinGuanquan LinXinyong WangXiaolei LiuZhaobo LangJian-Kang ZhuPengcheng WangaInstitute of Advanced Biotechnology, Institute of Homeostatic Medicine, and School of Medicine, Southern University of Science and Technology, Shenzhen 518055, ChinabChinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, ChinacSchool of Medicine, Macau University of Science and Technology, Macau SAR 999078, China Proceedings of the National Academy of Sciences 123 20 2026-05-19T07:00:00Z 2026-05-19T07:00:00Z 10.1073/pnas.2603627123 https://www.pnas.org/doi/abs/10.1073/pnas.2603627123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2515702123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 19, May 2026. <br/>SignificanceSeeds evolved when plants retained the female spores inside the parent tissue. The growth of the spores was accommodated by removing part of the nucellus, the maternal tissue responsible for female meiosis. Here, we demonstrate that ... A change in the cell wall status initiates the elimination of the nucellus in Arabidopsis doi:10.1073/pnas.2515702123 2026-05-05T07:00:00Z Miryam IannacconeWenjia XuDennys-Marcela Gomez-PaezSandrine ChoinardElisa MaricchioloAlexis PeaucelleAline VoxeurKalina Tamara HaasCatherine LapierreJose M. Jiménez-GómezAndrea PompaEnrico MagnaniaInstitut Jean-Pierre Bourgin, Institut National de Rrecherche pour l’Agriculture, l’Alimentation et l’Environnement, AgroParisTech, CNRS, University of Paris-Saclay, Versailles Cedex 78026, Francebhttps://ror.org/04q4kt073Section of Biological and Biotechnological Sciences, Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino 61029, Italychttps://ror.org/04mfzb702Centro de Biotecnología y Genómica de Plantas, UPM-INIA-CSIC, Campus de Montegancedo, Madrid 28223, Spain Proceedings of the National Academy of Sciences 123 19 2026-05-12T07:00:00Z 2026-05-12T07:00:00Z 10.1073/pnas.2515702123 https://www.pnas.org/doi/abs/10.1073/pnas.2515702123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2523859123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 19, May 2026. <br/>SignificanceThe basis for the selective activity of saponins across organisms, and for plant self-resistance during their biosynthesis and storage, is not fully understood. Here, we show that membrane sterol identity governs susceptibility to saponins and ... Sterol divergence across eukaryotic kingdoms determines membrane susceptibility to saponins, a class of plant defense compounds doi:10.1073/pnas.2523859123 2026-05-08T07:00:00Z Malbor DervishiJan GüntherJinhui LiHuriye Deniz UzunHans Christian Bruun HansenThomas Günther PomorskiAnja Thoe FuglsangViviana MonjeSøren Bakahttps://ror.org/035b05819Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg 1871, Denmarkbhttps://ror.org/01y64my43Department of Chemical and Biological Engineering, University of Buffalo, Amherst, NY 14260chttps://ror.org/04tsk2644Department of Molecular Biochemistry, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Bochum 44780, Germany Proceedings of the National Academy of Sciences 123 19 2026-05-12T07:00:00Z 2026-05-12T07:00:00Z 10.1073/pnas.2523859123 https://www.pnas.org/doi/abs/10.1073/pnas.2523859123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2533820123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 19, May 2026. <br/>SignificancePlants rely on chemical defenses to deter herbivores, yet the evolutionary processes that generate such systems remain poorly understood. Two-component defenses, in which inactive compounds are rapidly activated upon damage, offer an ideal ... A sugar chain–dependent two-component chemical defense in Hedera helix reveals substrate-driven β-glucosidase evolution in Apiales doi:10.1073/pnas.2533820123 2026-05-04T07:00:00Z Han XiaoyangYang JirongDeng ZixinYu YiaDepartment of Gastroenterology, Zhongnan Hospital of Wuhan University, Hubei Clinical Center and Key Laboratory of Intestinal and Colorectal Disease, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, ChinabAnhui Province Key Laboratory of Bioactive Natural Products, School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, ChinacScience & Technology Industrial Parks of Anhui University of Chinese Medicine, Hefei 230012, Chinadhttps://ror.org/054x1kd82State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning 530007, China Proceedings of the National Academy of Sciences 123 19 2026-05-12T07:00:00Z 2026-05-12T07:00:00Z 10.1073/pnas.2533820123 https://www.pnas.org/doi/abs/10.1073/pnas.2533820123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2601574123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 19, May 2026. <br/>SignificancePlants experience multiple environmental signals, such as light and temperature, that must be interpreted together to regulate growth and development. How this integrative capacity evolved across plant lineages remained unclear. By comparing ... Conserved regulatory core and lineage-specific diversification of light–temperature integration in plants doi:10.1073/pnas.2601574123 2026-05-05T07:00:00Z Bruno CatarinoFernando Rodríguez-MarínCristina ÚrbezChristina ArvanitidouEva ÁlvarezFederico ValverdeJosé Manuel Franco-ZorrillaFrancisco Romero-CamperoMiguel A. BlázquezaInstituto de Biología Molecular y Celular de Plantas (CSIC - Universitat Politècnia de València), Valencia 46022, SpainbInstituto de Bioquímica Vegetal y Fotosíntesis (CSIC - Universidad de Sevilla), Sevilla 41092, Spainchttps://ror.org/015w4v032Centro Nacional de Biotecnología (CSIC), Cantoblanco 28049, Spaindhttps://ror.org/03yxnpp24Departamento de Ciencias de la Computación e Inteligencia Artificial, Universidad de Sevilla, Sevilla 41012, Spain Proceedings of the National Academy of Sciences 123 19 2026-05-12T07:00:00Z 2026-05-12T07:00:00Z 10.1073/pnas.2601574123 https://www.pnas.org/doi/abs/10.1073/pnas.2601574123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2601719123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 19, May 2026. <br/>SignificanceAchieving durable, broad-spectrum crop protection remains difficult because plant immunity models often rely on limited species and overlook natural genetic diversity. To understand how plant defense networks shift across diverse lineages, we ... A multiplant transcriptomic atlas reveals conserved and lineage-specific defense architectures in response to Botrytis cinerea doi:10.1073/pnas.2601719123 2026-05-06T07:00:00Z Ritu SinghAnna Jo MuhichCloe TomCeline CaseysDaniel J. KliebensteinaDepartment of Plant Science, University of California, Davis, CA 95616bPlant Biology Graduate Group, University of California, Davis, CA 95616cHHMI, Chevy Chase, MD 20815 Proceedings of the National Academy of Sciences 123 19 2026-05-12T07:00:00Z 2026-05-12T07:00:00Z 10.1073/pnas.2601719123 https://www.pnas.org/doi/abs/10.1073/pnas.2601719123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2605032123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 19, May 2026. <br/>SignificanceBetter understanding plant photosynthetic responses to elevated temperature and leaf-to-air vapor pressure difference (Δe) is critical under climate change. By separating temperature and Δeeffects across multiple CO2levels, we demonstrate ... Coordinated stomatal, mesophyll, and biochemical functions in photosynthetic responses to heat and dryness doi:10.1073/pnas.2605032123 2026-05-05T07:00:00Z Xingyu HuSuan Chin WongGraham D. FarquharaState Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, ChinabDivision of Plant Sciences, Research School of Biology, College of Science and Medicine, The Australian National University, Canberra, ACT 2600, Australia Proceedings of the National Academy of Sciences 123 19 2026-05-12T07:00:00Z 2026-05-12T07:00:00Z 10.1073/pnas.2605032123 https://www.pnas.org/doi/abs/10.1073/pnas.2605032123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2527961123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 18, May 2026. <br/>SignificanceThe fusion of petals into a corolla tube was a key innovation in flower evolution. Still, its genetic control in lineages with petals initiating from a shared ring primordium remains mysterious. We identify a regulatory module in chrysanthemum ... An auxin-induced transcriptional cascade CmBES1–CmSAUR66 orchestrates the ray floret development in Chrysanthemum morifolium doi:10.1073/pnas.2527961123 2026-04-27T07:00:00Z Diwen JiaYuhang ZhangJiangshuo SuJiaqi WangWeiming ZhangSong LiLibang MaJiafu JiangSumei ChenLian DingFadi ChenaState Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, Nanjing, Jiangsu 210095, ChinabZhongshan Biological Breeding Laboratory, Nanjing, Jiangsu 210014, ChinacKey Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China Proceedings of the National Academy of Sciences 123 18 2026-05-05T07:00:00Z 2026-05-05T07:00:00Z 10.1073/pnas.2527961123 https://www.pnas.org/doi/abs/10.1073/pnas.2527961123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2530182123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 17, April 2026. <br/>SignificancePlants can be clonally propagated in a variety of ways, and plant clones have been used in agriculture for millennia. The in vitro cloning of plants is a critical component of plant biotechnology, enabling transformation and gene-editing. ... Genome degradation in plant tissue culture doi:10.1073/pnas.2530182123 2026-04-22T07:00:00Z Matthew W. DavisCharles A. LeslieChaehee LeeEvan LongLi MeinholdMegan LorencFranklin LewisPatrick J. BrownGrey MonroeaDepartment of Plant Sciences, University of California, Davis, CA 95616bDepartment of Agriculture–Agricultural Research Service, Northwest Irrigation and Soils Research Laboratory, Kimberly, ID 83341 Proceedings of the National Academy of Sciences 123 17 2026-04-28T07:00:00Z 2026-04-28T07:00:00Z 10.1073/pnas.2530182123 https://www.pnas.org/doi/abs/10.1073/pnas.2530182123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2601242123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 17, April 2026. <br/>SignificanceAlthough mitochondrial fusion is critical for sustaining mitochondrial function, the molecular mechanism that drives this process is divergent across eukaryotes and remains poorly defined in plants. In this study, we identify a previously ... PMF proteins mediate mitochondrial fusion in Arabidopsis doi:10.1073/pnas.2601242123 2026-04-22T07:00:00Z Ryan P. KenneallyYu TangWesley J. BobstRui Tong KhorLily GaribyanNeha R. JagYangnan GuaDepartment of Plant and Microbial Biology, University of California, Berkeley, CA 94720 Proceedings of the National Academy of Sciences 123 17 2026-04-28T07:00:00Z 2026-04-28T07:00:00Z 10.1073/pnas.2601242123 https://www.pnas.org/doi/abs/10.1073/pnas.2601242123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2519914123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 16, April 2026. <br/>SignificanceKinetic acclimation enables proteins to adjust their activity in response to environmental perturbations. For the CO2-fixing enzyme Rubisco, kinetic acclimation may be conferred by its small subunits. Plants express multiple small subunits and ... Rubisco kinetic acclimation at the holoenzyme level doi:10.1073/pnas.2519914123 2026-04-15T07:00:00Z Bryce AskeyMaddie CeminskyElena ScottYongsheng WangZhen Guo OhStavros AzinasArthur LaganowskyLaura Helen GunnaPlant Biology Section, School of Integrated Plant Science, Cornell University, Ithaca, NY 14853bDepartment of Chemistry, Texas A&M University, College Station, TX 77843cDepartment of Molecular Medicine, Cornell University, Ithaca, NY 14853dDepartment of Biochemistry and Biophysics, Science for Life Laboratory, Stockholm University, Solna 171 65, Sweden Proceedings of the National Academy of Sciences 123 16 2026-04-21T07:00:00Z 2026-04-21T07:00:00Z 10.1073/pnas.2519914123 https://www.pnas.org/doi/abs/10.1073/pnas.2519914123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2519949123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 16, April 2026. <br/>SignificanceRibulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), the key enzyme in photosynthetic CO2fixation, has long challenged efforts to understand its assembly, regulation, and potential for enhancement. Here, we show that multiple small ... Small subunit isoform diversity underlies structural heterogeneity in native plant Rubisco doi:10.1073/pnas.2519949123 2026-04-15T07:00:00Z Thomas ReynoldsZhemin ZhangDušan ŽivkovićSteven KellyJani R. BollaaDepartment of Biology, Univeristy of Oxford, Oxford OX1 3RB, United KingdombDepartment of Pharmacology, Case Western Reserve University, Cleveland, OH 44106cDepartment of Biochemistry, University of Oxford, Oxford, OX1 3QU, United Kingdom Proceedings of the National Academy of Sciences 123 16 2026-04-21T07:00:00Z 2026-04-21T07:00:00Z 10.1073/pnas.2519949123 https://www.pnas.org/doi/abs/10.1073/pnas.2519949123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2534140123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 16, April 2026. <br/>SignificancePlants survive drought by sensing the hormone abscisic acid (ABA), but how receptor structure converts hormone levels into precise stress responses has remained unclear. Here, we uncover a minimal five-amino acid “code” that determines whether ... Evolutionary-based remodeling of ABA receptors reveals the structural basis of hormone perception and regulation doi:10.1073/pnas.2534140123 2026-04-15T07:00:00Z Maria Rivera-MorenoMar BonoLourdes InfantesPedro L. RodriguezArmando AlbertaInstituto de Química-Física “Blas Cabrera”, Consejo Superior de Investigaciones Científicas, Madrid ES-28006, SpainbInstituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia, Valencia ES-46022, Spain Proceedings of the National Academy of Sciences 123 16 2026-04-21T07:00:00Z 2026-04-21T07:00:00Z 10.1073/pnas.2534140123 https://www.pnas.org/doi/abs/10.1073/pnas.2534140123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2606254123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 16, April 2026. <br/> The next frontier: Exploring plant hypoxia sensing and response mechanisms through synthetic biology doi:10.1073/pnas.2606254123 2026-04-13T07:00:00Z Emmanuelle GracietaBiology Department, Maynooth University, Maynooth Co. Kildare W23 XY3X, Ireland Proceedings of the National Academy of Sciences 123 16 2026-04-21T07:00:00Z 2026-04-21T07:00:00Z 10.1073/pnas.2606254123 https://www.pnas.org/doi/abs/10.1073/pnas.2606254123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2518761123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 15, April 2026. <br/>SignificanceThis study addresses the prolonged juvenile phase inBetulaplatyphylla(white birch) breeding by identifyingBpFLCas a central flowering-time regulator.BpFLCdelays flowering and promotes vegetative growth, thereby influencing carbon ... BpFLC coordinates seasonal and age-related flowering in Betula platyphylla through environmental cues and epigenetic regulation doi:10.1073/pnas.2518761123 2026-04-06T07:00:00Z Yi LiuSui WangTangchun ZhengHuiying SuoDi XiaoDong ZengXiangling YouHeike W. SederoffVincent L. ChiangXiyang ZhaoRonald R. SederoffGuanzheng QuaState Key Laboratory of Tree Genetics and Breeding, School of Forestry, Northeast Forestry University, Harbin 150040, ChinabJilin Provincial Key Laboratory of Tree and Grass Genetics and Breeding, College of Forestry and Grassland Science, Jilin Agricultural University, Changchun 130118, ChinacNational Key Laboratory of Smart Farm Technologies and Systems, Northeast Agricultural University, Harbin 150030, ChinadKey Laboratory of Soybean Biology of Chinese Education Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150030, ChinaeNational Engineering Research Center for Floriculture, School of Landscape Architecture, Beijing Forestry University, Beijing 100083, ChinafCollege of Life Science, Northeast Forestry University, Harbin 150040, ChinagKey Laboratory of Horticulture Crop Genomics and Genetic Improvement in Xinjiang, Institute of Fruits and Vegetables, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, ChinahDepartment of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695iForest Biotechnology Group, Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC 27695 Proceedings of the National Academy of Sciences 123 15 2026-04-14T07:00:00Z 2026-04-14T07:00:00Z 10.1073/pnas.2518761123 https://www.pnas.org/doi/abs/10.1073/pnas.2518761123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2525772123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 15, April 2026. <br/>SignificanceApproximately half of global photosynthesis occurs in oceans. Marine eukaryotic algae synthesize specialized carotenoids to facilitate efficient light capture underwater. While the multistep biosynthesis of these pigments has been partially ... An acetyltransferase family required for biosynthesis of diverse marine carotenoids doi:10.1073/pnas.2525772123 2026-04-09T07:00:00Z Tianjun CaoXuechun BaiTingting YouYanyou JiangMartin LohrXiaobo LiaState Key Laboratory of Gene Expression, School of Life Sciences, Westlake University, Hangzhou 310030, ChinabInstitute of Biology, Westlake Institute for Advanced Study, Hangzhou 310030, ChinacWestlake Laboratory of Life Sciences and Biomedicine, Hangzhou 310024, ChinadInstitut für Molekulare Physiologie, Johannes Gutenberg University, 55099 Mainz, GermanyeZhejiang Key Laboratory of Low-Carbon Intelligent Synthetic Biology, Westlake University, Hangzhou 310030, China Proceedings of the National Academy of Sciences 123 15 2026-04-14T07:00:00Z 2026-04-14T07:00:00Z 10.1073/pnas.2525772123 https://www.pnas.org/doi/abs/10.1073/pnas.2525772123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2528641123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 15, April 2026. <br/>SignificanceHuanglongbing (HLB) is the most devastating disease of citrus with no resistance having been identified in commercial cultivars. Previous work implicated papain-like cysteine proteases (PLCPs) as an important hub of defense in citrus; however, ... A secreted citrus protease cleaves an outer membrane protein of the Huanglongbing pathogen doi:10.1073/pnas.2528641123 2026-04-07T07:00:00Z Alexander J. McClellandBin HuYuantao XuXiaodong FangChunxia WangBenjamin L. KochAmelia H. LovelaceEva HawaraYuanchun WangZhiqian PangAgustina De FrancescoSuzanne P. van WierAndrew M. BeekmanAmit LevyNian WangRenier A. L. van der HoornQiang XuWenbo MaaThe Sainsbury Laboratory, University of East Anglia, Norwich NR4 7UH, United KingdombNational Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan 430070, ChinacCitrus Research and Education Center, Department of Plant Pathology, Microbiology and Cell Science, University of Florida/Institute of Food and Agricultural Sciences, Lake Alfred, FL 33850dDepartment of Microbiology and Plant Pathology, University of California Riverside, Riverside, CA 92521eSchool of Chemistry, Pharmacy and Pharmacology, University of East Anglia, Norwich NR4 7TJ, United KingdomfPlant Chemetics Laboratory, Department of Biology, University of Oxford, Oxford OX1 3RB, United Kingdom Proceedings of the National Academy of Sciences 123 15 2026-04-14T07:00:00Z 2026-04-14T07:00:00Z 10.1073/pnas.2528641123 https://www.pnas.org/doi/abs/10.1073/pnas.2528641123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2531865123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 15, April 2026. <br/>SignificanceFuture forest resilience depends on whether trees can acclimate to rising heat and drought. Using multiyear manipulations of soil moisture and air temperature, we tested how long-term acclimation shapes leaf cooling and damage inFagus ... Hydraulic stress limits thermal acclimation in trees under chronic drought doi:10.1073/pnas.2531865123 2026-04-06T07:00:00Z Alyssa T. KullbergArianna MilanoAlvaro PorettiYike MaPatrick FavreKate M. JohnsonGiovanni BortolamiMaxwell BergströmThibaut JuillardJin WuZhengfei GuoJonas GislerMarcus SchaubCharlotte GrossiordaPlant Ecology Research Laboratory, School of Architecture, Civil and Environmental Engineering, École polytechnique fédérale de Lausanne, Lausanne CH-1015, SwitzerlandbForest and Soil Ecology Research Unit, Swiss Federal Institute for Forest, Snow, and Landscape Research, Birmensdorf CH-8903, SwitzerlandcCentre for Ecological Research and Forestry Applications, Barcelona 08193, SpaindSchool of Biological Sciences and Institute for Climate and Carbon Neutrality, The University of Hong Kong, ChinaeState Key Laboratory of Agrobiotechnology, Chinese University of Hong Kong, Hong Kong, China Proceedings of the National Academy of Sciences 123 15 2026-04-14T07:00:00Z 2026-04-14T07:00:00Z 10.1073/pnas.2531865123 https://www.pnas.org/doi/abs/10.1073/pnas.2531865123?af=R https://www.pnas.org/doi/abs/10.1073/pnas.2534827123?af=R Proceedings of the National Academy of Sciences, Volume 123, Issue 15, April 2026. <br/> Expanded applicability of the triple oxygen isotope composition of phytoliths as an indicator of atmospheric relative humidity doi:10.1073/pnas.2534827123 2026-04-06T07:00:00Z Anne AlexandreJulie AlemanMinger GuoDavid Au YangRobin HavasElizabeth WebbaCentre Européen de Recherche et d’Enseignement des Géosciences de l’Environnement (CEREGE), Centre National de la Recherche Scientifique (CNRS), Aix-Marseille Université, Institut de Recherche pour le Développement (IRD), Institut National de la Recherche Agronomique (INRA), Collège de France, Aix-en-Provence 13580, FrancebTrent School of the Environment, Trent University, Peterborough, ON K9L 0G2, CanadacEarth Sciences, University of Western Ontario, London, ON N6A 5B7, Canada Proceedings of the National Academy of Sciences 123 15 2026-04-14T07:00:00Z 2026-04-14T07:00:00Z 10.1073/pnas.2534827123 https://www.pnas.org/doi/abs/10.1073/pnas.2534827123?af=R