Ana Carina da Silva Cândido Seron, Dthenifer Cordeiro Santana, Izabela Cristina de Oliveira, Larissa Pereira Ribeiro Teodoro, Cid Naudi Silva Campos, Gileno Brito de Azevedo, Rita de Cássia Félix Alvarez, Regimar Garcia Dos Santos, Paulo Eduardo Teodoro
{"title":"Is There a Relationship Between Secondary Metabolites of Leaves and the Growth of Eucalyptus Species?","authors":"Ana Carina da Silva Cândido Seron, Dthenifer Cordeiro Santana, Izabela Cristina de Oliveira, Larissa Pereira Ribeiro Teodoro, Cid Naudi Silva Campos, Gileno Brito de Azevedo, Rita de Cássia Félix Alvarez, Regimar Garcia Dos Santos, Paulo Eduardo Teodoro","doi":"10.1111/ppl.70898","DOIUrl":"https://doi.org/10.1111/ppl.70898","url":null,"abstract":"<p><p>Flavonoids are essential molecules that affect plant growth and development and act as defense mechanisms against biotic and abiotic factors. This study aimed to assess whether the content of flavonoids in different species of Eucalyptus is related to tree growth. The objective of the work is (i) to identify whether there is a relationship between flavonoids, height and diameter among Eucalyptus species and (ii) to identify differences in flavonoid content between species. The experimental design was randomized blocks with three replicates, with 20 plants in each experimental plot. The treatments consisted of six Eucalyptus species: Eucalyptus camaldulensis, E. saligna, E. grandis, E. urophylla, C. citriodora and a GG100 clone (hybrid clone of E. urophylla × E. grandis). This study measured plant diameter at breast height (DBH) and height (HC). Leaf samples were taken from the species in their respective repetitions for flavonoid evaluation, and subsequent separation and quantification of the isoflavones, daidzein (D1), daidzin (D2), genistein (G1), genistin (G2), using liquid chromatography. In general, the E. grandis species showed the best results for DAP and AP. D1 was higher than what? for C. citriodora and E. saligna. D2 was higher than what? for E. camaldulensis. The principal component analysis demonstrated a negative relationship among the variables AP and DAP with D1, D2, G1, and G2. With the results of this study, it can be inferred that there is no relationship between height, diameter, and flavonoids among the Eucalyptus species evaluated since the species with the lowest concentrations of isoflavones had the highest growth and diameter.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 3","pages":"e70898"},"PeriodicalIF":3.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13120853/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147778497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xue Huang, Umm E Hani, Tuba Tariq, Khadim Hussain, Sana Batool, Ghazala Mustafa, Mansour Ghorbanpour, Murtaza Hasan
{"title":"Metabolic Regulations of Glycine max Induced by Potassium Nanoparticles Under Simulated Salinity Conditions: A Comparative Morpho-Physiological Aspect.","authors":"Xue Huang, Umm E Hani, Tuba Tariq, Khadim Hussain, Sana Batool, Ghazala Mustafa, Mansour Ghorbanpour, Murtaza Hasan","doi":"10.1111/ppl.70918","DOIUrl":"https://doi.org/10.1111/ppl.70918","url":null,"abstract":"<p><p>Crop productivity is a major concern in modern agriculture due to fluctuating environmental conditions, such as salinity. This study aims to explore the green-synthesized potassium nanoparticles (K-NPs) mediated metabolic regulations, including improved ion homeostasis, photosynthetic efficiency, and antioxidative defense mechanisms in soybean (Glycine max var. Soygold) under salinity stress. The K-NPs were green synthesized using the leaf extract of Cordia myxa L. and then characterized using UV-Vis spectroscopy, high-resolution transmission electron microscopy (HRTEM), and zeta potential. Soybean seedlings were treated with 0, 30, 60, and 90 mg L<sup>-1</sup> of K-NPs along with salinity stress of 30, 60, and 90 mg L<sup>-1</sup> NaCl at 3, 7, and 14 days of plant growth. After the treatments, morphological, biochemical and antioxidant activities were measured. The plant root/shoot lengths were enhanced by 9% and 59%, respectively, while the number of leaves was increased by 32%, fresh biomass by 84%, and dry weight by 105% under K-NPs treatments compared to control. K-NPs at 30 and 60 mg L<sup>-1</sup>showed non-significant results under 60 and 90 mg L<sup>-1</sup> NaCl concentrations, but highly significant results were observed at 90 mg L<sup>-1</sup> K-NPs under 30 and 90 mg L<sup>-1</sup> NaCl concentrations. The 90 mg L<sup>-1</sup> K-NP concentration improved the root/shoot lengths of soybean seedlings by 33% and 132%, respectively. The number of leaves were increased by 38%, the plant fresh biomass by 22%, and dry weight by 133% as compared to lower concentrations under salinity stress. Furthermore, phenolic contents, secondary metabolites, and ionic homeostasis were also increased in the presence of 90 mg L<sup>-1</sup> K-NPs under 90 mg L<sup>-1</sup> NaCl salinity stress. When exposed to salt stress, K-NPs treatment increased antioxidant enzymes (SOD, CAT, and POX) more than the salt stressed control. Taken together, these results suggest that K-NPs are effective nanomaterials for plant growth enhancement by regulating the defense mechanisms of soybean to cope with salt stress conditions. The findings could help in the designing and optimization of nanomaterial-based fertilizers in order to achieve sustainable agriculture.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 3","pages":"e70918"},"PeriodicalIF":3.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147819538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lyudmila Khalilova, Elena Shuyskaya, Maria Prokofieva, Yurii Balnokin
{"title":"The Response of Leaf Tissues of the C<sub>4</sub> Euhalophyte Suaeda altissima (L.) Pall. To Salinity Stress.","authors":"Lyudmila Khalilova, Elena Shuyskaya, Maria Prokofieva, Yurii Balnokin","doi":"10.1111/ppl.70924","DOIUrl":"https://doi.org/10.1111/ppl.70924","url":null,"abstract":"<p><p>Impact of long-term (17-day) exposure to growth-stimulating (250 mM) and growth-inhibitory (750 mM) NaCl concentrations on biochemical characteristics related to C<sub>4</sub> pathway, anatomy and ultrastructure of chloroplasts of leaf tissues in the euhalophyte S. altissima was investigated. Immunological and biochemical studies identified C<sub>4</sub> enzymes, phosphoenol pyruvate carboxylase (PEPC), NAD-malic enzyme (NAD-ME), and NAD-malate dehydrogenase (NAD-MDH). Anatomical studies revealed Kranz anatomy with mesophyll (MCs) and Kranz cells (KCs) at the leaf periphery. Water-storage cells (WSCs) and vascular bundle chlorenchyma cells (VBCCs), both located in the leaf middle, contained chloroplasts, as did MCs and KCs. Electron microscopy revealed granal chloroplasts containing starch granules, while immunogold labeling revealed Rubisco in chloroplasts of all chlorophyllous tissues. The highest Rubisco content was found in KC chloroplasts. These results are consistent with the notion that S. altissima is a C<sub>4</sub> plant; however, they do not exclude its belonging to an intermediate C<sub>3</sub>-C<sub>4</sub> form. The growth-stimulating NaCl concentration increased Rubisco content in all chlorophyllous tissues and activity of NAD-ME in leaves activating, probably, the C<sub>4</sub> pathway. In contrast, the growth-inhibitory NaCl concentration reduced Rubisco content, decreasing it below the level observed in the absence of NaCl. An increase in cell size was observed in the chlorophyllous tissues in response to both the growth-stimulating and growth-inhibitory salinity, leading to an increase in leaf succulence. The greatest increase in size was observed in WSCs. Chloroplasts from different tissues differed in their ability to maintain native structure and robustness of Rubisco-chloroplast binding under salinity, suggesting chloroplast heterogeneity and different Rubisco sensitivities to NaCl.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 3","pages":"e70924"},"PeriodicalIF":3.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147841311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Untargeted Metabolomics Coupled With Machine Learning Unravels Crop-Specific Versus Generalized Effects of Biostimulants in Cucumber, Pepper, and Tomato.","authors":"Hajar Salehi, Pascual García-Pérez, Luigi Lucini","doi":"10.1111/ppl.70904","DOIUrl":"10.1111/ppl.70904","url":null,"abstract":"<p><p>In recent years, agricultural practices have shifted toward sustainability, aiming to reduce the use of agrochemicals and rely more on bio-based solutions. However, the effectiveness of these latter suffers from inconsistency. Understanding how different crops respond to biostimulants, instead of referring to a specific trial or crop, is a challenge in this field. This study attempts to identify common metabolite signatures associated with different commercial biostimulants across three crops, moving from trial-specific to more generalized effects in horticultural crops. To this aim, advanced metabolomics data integration and supervised statistical methods have been used. Advanced multivariate analyses included analysis of variance (ANOVA)-multiblock orthogonal partial least squares (AMOPLS), and Data Integration Analysis for Biomarker discovery using Latent variable approaches for Omics studies (DIABLO). HCA and AMOPLS revealed differences in metabolic profiles among the biostimulant treatments, while confirming crop-specific responses. Data integration indicated that three metabolites, betaine, N-caffeoylputrescine, and 2-amino-4-hydroxypyrimidine-5-carboxylic acid, were consistently modulated across all three crops treated by the multi-component biostimulant containing osmolytes and zeatin. Notably, these metabolites are known to be involved in plant growth and adaptation to different abiotic stresses. Overall, the applied analytical approach enabled the identification of putative markers within complex metabolic datasets that included different crop species. The use of independent validation methods increases confidence in these markers and supports the integration of complementary datasets in biostimulant studies.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 3","pages":"e70904"},"PeriodicalIF":3.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13125964/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147778165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Genome Editing of a Carotenogenic Gene for Lycopene Enhancement Increases Heavy Metal Stress Susceptibility in Tomato (Solanum lycopersicum L.).","authors":"Sanskriti Vats, Harish Jadhav, Badal Mahakalkar, Gunvant Patil, Humira Sonah, Tilak Raj Sharma, Rupesh Deshmukh","doi":"10.1111/ppl.70884","DOIUrl":"https://doi.org/10.1111/ppl.70884","url":null,"abstract":"<p><p>Improving the nutritional quality and abiotic stress tolerance of crop plants is essential for sustainable agriculture and global food security. Recent advances in genome editing, particularly the CRISPR/Cas9 system, have enabled precise modification of metabolic pathways to enhance valuable traits such as carotenoid accumulation. The present study aimed to enhance fruit lycopene content and assess associated stress responses in tomato (Solanum lycopersicum L.) through targeted genome editing of the lycopene beta cyclase (β-LCY, EC 5.5.1.19) gene, encoding for a key enzyme in the carotenoid biosynthetic pathway. A Csy4-based multiplex CRISPR/Cas9 approach was applied to edit β-LCY in three tomato genotypes, including two cultivated varieties and the wild species S. peruvianum L. Genotypic analysis revealed significant genotype-dependent differences in editing efficiency. The β-LCY knockout lines exhibited markedly increased lycopene accumulation in fruits, resulting in enhanced pigmentation. However, when subjected to cadmium stress, these lines showed greater susceptibility than wild-type plants, with pronounced wilting and stress symptoms. Physiological, biochemical, and metabolomic analyses confirmed disruption of stress-response mechanisms associated with carotenoid pathway modification. These findings demonstrate that while genome editing can successfully enhance desirable metabolic traits, it may also impair abiotic stress tolerance. This study provides new insight into the complex interplay between the carotenoid biosynthetic pathway and stress adaptation in tomato.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 3","pages":"e70884"},"PeriodicalIF":3.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147778470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sadras Bhavana, P Raghuveer Rao, P Latha, G S Madhu Bindu, M Vijay Kumar, C Subha Lakshmi
{"title":"The Role of Mathematical Modeling in Plant Abiotic Stress Biology: Current Trends and Future Prospects.","authors":"Sadras Bhavana, P Raghuveer Rao, P Latha, G S Madhu Bindu, M Vijay Kumar, C Subha Lakshmi","doi":"10.1111/ppl.70909","DOIUrl":"https://doi.org/10.1111/ppl.70909","url":null,"abstract":"<p><p>Plant responses to abiotic stress are governed by complex interactions operating across physiological, biochemical, and molecular levels, which remain difficult to interpret using experimental approaches alone. Increasing frequency and intensity of stresses such as drought, salinity, and heat further highlight the need for integrative tools that can capture these dynamics and support predictive understanding. Mathematical modeling has therefore become an important approach for analyzing plant stress responses across multiple scales. This review examines the range of modeling frameworks applied in plant abiotic stress biology, including empirical, statistical, mechanistic, and process-based models, along with emerging machine learning approaches. Their capacity to represent plant responses from cellular processes to whole-plant and crop-level behavior is discussed, with particular attention to their application under single and combined stress conditions. Recent developments in integrating physiological knowledge with omics-driven data and data-driven modeling approaches are also considered. Current applications in crop improvement, stress assessment, and climate-resilient agricultural planning are evaluated, alongside key limitations such as parameter uncertainty, scale integration, and representation of interacting stresses. The review further identifies directions for developing more robust and biologically grounded modeling frameworks that can improve predictive capability under variable environmental conditions. By synthesizing existing approaches and highlighting current gaps, this article aims to support the advancement of modeling strategies in plant abiotic stress research.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 3","pages":"e70909"},"PeriodicalIF":3.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147778481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Endophytic Biostimulant Pyrroloquinoline Quinone Enhances Banana Growth and Primes Immunity Against Fusarium Wilt.","authors":"Shih-Hsun Walter Hung, Man-Yun Yu, Chia-Ho Liu, Tsai-Ching Huang, Jian-Hau Peng, Nai-Yun Jang, Chih-Horng Kuo, Yu-Liang Yang, Ying-Ning Ho, En-Pei Isabel Chiang, Hau-Hsuan Hwang, Chieh-Chen Huang","doi":"10.1111/ppl.70913","DOIUrl":"https://doi.org/10.1111/ppl.70913","url":null,"abstract":"<p><p>Pyrroloquinoline quinone (PQQ) is a redox cofactor derived from prokaryotes that participates in various biological processes involving dehydrogenase enzymes. Previous field trials identified a PQQ-producing endophyte, Burkholderia seminalis 869T2, which enhances banana growth and reduces Fusarium wilt incidence from 24.5% to 3.4%. While more recent studies have confirmed its agricultural benefits across multiple plant species, the underlying molecular mechanisms remain unclear. Here, integrated omics and imaging mass spectrometry were employed to investigate the role of PQQ in planta. Our results indicate that PQQ achieves these outcomes by modulating key aspects of plant energy metabolism, including the tricarboxylic acid (TCA) cycle, oxidative phosphorylation, and NAD/NADP pathways. In addition, PQQ appears to influence phytohormone signalling pathways and trigger systemic plant resistance. Consistent with these molecular responses, exogenous PQQ enhanced root and shoot development and improved resistance to Fusarium infection. Collectively, these findings indicate that the endophyte functions as a biostimulant through PQQ production, coordinating plant metabolism and defence to counter pathogen invasion. This study provides mechanistic insight into plant-endophyte mutualism and highlights the potential of both PQQ and PQQ-producing endophytes as biostimulants for sustainable agricultural applications.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 3","pages":"e70913"},"PeriodicalIF":3.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13133254/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147819593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Loïc Haelterman, Run Qi, Pramod Sargar, Laszlo Kupcsik, Jiajia Xu, Claudia Chiodi, Dirk Inzé, Christian Hermans
{"title":"Transcriptomic Signatures of Nitrate Response in Rapeseed Genotypes With Distinct Root System Sizes.","authors":"Loïc Haelterman, Run Qi, Pramod Sargar, Laszlo Kupcsik, Jiajia Xu, Claudia Chiodi, Dirk Inzé, Christian Hermans","doi":"10.1111/ppl.70908","DOIUrl":"https://doi.org/10.1111/ppl.70908","url":null,"abstract":"<p><p>Nitrogen fertilization remains a cornerstone of modern agriculture, yet its excessive use contributes to environmental degradation. Rapeseed (Brassica napus L.) is notably inefficient in N uptake, highlighting the importance of root traits that enhance soil exploration and nutrient acquisition. This study investigated root transcriptomic responses to nitrate availability across rapeseed genetic diversity. A panel of 40 lines was screened on vertical agar plates, revealing substantial variation in root morphology, strong heritability, and genetic control. Low nitrate supply increased the root-to-shoot biomass ratio and stimulated lateral root proliferation. Transcriptomic profiling was then conducted on three genotype pairs selected to represent distinct root system sizes. Hydroponically grown plants were exposed to two divergent nitrate levels for 24 h, and root tissues were harvested for RNA sequencing. Differential expression analysis identified over a 1000 genes significantly induced or repressed by nitrate treatment, with only 10% shared across genotypes. Gene ontology enrichment analysis revealed a central nitrate-responsive transcriptional program, accompanied by distinct molecular signatures associated with root size. Co-expression network analysis identified regulatory modules that integrate nitrate transporters with auxin signaling and energy metabolism. These modules also uncovered roles for glucosinolate biosynthesis and aquaporin-mediated water transport. This study provides a set of candidate genes and regulatory networks that represent promising targets for breeding rapeseed varieties with optimized root traits for sustainable agriculture.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 3","pages":"e70908"},"PeriodicalIF":3.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147841319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Christos Bazakos, Michal Lieberman-Lazarovich, Hélène S Robert
{"title":"Editorial: Special Issue \"Methodologies to Assess Crop Stress Resilience\".","authors":"Christos Bazakos, Michal Lieberman-Lazarovich, Hélène S Robert","doi":"10.1111/ppl.70921","DOIUrl":"https://doi.org/10.1111/ppl.70921","url":null,"abstract":"","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 3","pages":"e70921"},"PeriodicalIF":3.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147856913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of the Antibiotic Norfloxacin on Volatile Organic Compound Emissions From the Cyanobacteria Microcystis aeruginosa.","authors":"Jiayue Wang, Haozhe Xu, Yinggang Wei, Tianyu Huang, Xinyuan Zhao, Zhan Jing, Tingting Lu, Lexin Huang, Huiying Fu, Zhaojiang Zuo","doi":"10.1111/ppl.70910","DOIUrl":"https://doi.org/10.1111/ppl.70910","url":null,"abstract":"<p><p>Cyanobacterial volatile organic compounds (VOCs) play important roles in aquatic ecosystems and toxicology. To uncover the promoting mechanisms of norfloxacin on cyanobacterial VOC emissions, the cell growth, reactive oxygen species (ROS) content, photosynthetic performance, and VOC emissions in Microcystis aeruginosa were investigated upon exposure to 10, 30, and 60 μM norfloxacin, and related gene expression was analyzed under the concentration (60 μM) with maximum promotion on the emission. Norfloxacin inhibited cell growth by reducing photosynthetic performance, causing ROS accumulation, and altering normal metabolic processes by changing related gene expression. Seven main compound types were found in M. aeruginosa VOCs, mainly including alcohols, sulfocompounds, benzenes, aldehydes, terpenoids, hydrocarbons, and esters. For almost all VOC components (except β-cyclocitral), norfloxacin promoted their emission by up-regulating related genes, including seven genes in sulfocompound biosynthesis, seven genes in benzene biosynthesis, four genes in terpene biosynthesis, and four genes in fatty acid derivative (aldehydes, alcohols, hydrocarbons, and esters) formation. For β-cyclocitral, its increased emission under norfloxacin stress might result from the accumulated ROS rupturing the C7C8 double bonds of β-carotene. These findings demonstrated that antibiotics could improve VOC emissions from cyanobacteria by up-regulating related genes and increasing ROS accumulation (only for β-cyclocitral), which might intensify water odor, promote cyanobacteria dominating eutrophicated waters, and facilitate atmospheric chemical reactions above the waters.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 3","pages":"e70910"},"PeriodicalIF":3.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147778544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}