Physiologia plantarum最新文献

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Deep metabolomics revealed trajectories of jasmonate signaling-mediated primary metabolism in Arabidopsis upon Spodoptera litura herbivory. 深层代谢组学揭示了拟南芥在斜纹夜蛾(Spodoptera litura)草食过程中茉莉酸信号介导的初级代谢轨迹。
IF 5.4 2区 生物学
Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70035
Anish Kundu, Paramita Bera, Shruti Mishra, Jyothilakshmi Vadassery
{"title":"Deep metabolomics revealed trajectories of jasmonate signaling-mediated primary metabolism in Arabidopsis upon Spodoptera litura herbivory.","authors":"Anish Kundu, Paramita Bera, Shruti Mishra, Jyothilakshmi Vadassery","doi":"10.1111/ppl.70035","DOIUrl":"https://doi.org/10.1111/ppl.70035","url":null,"abstract":"<p><p>Plants defend against chewing herbivores by up-regulating jasmonic acid (JA) signaling, which activates downstream signaling cascades and produces numerous secondary metabolites that act as defense molecules against the herbivores. Although secondary metabolism always remains a focus of research, primary metabolism is also reported to be realigned upon herbivory. However, JA signaling-mediated modulation of primary metabolites and their metabolic pathways in plants are mostly unexplored. Here, we applied gas chromatography-mass spectrometry-based untargeted metabolomics aided with computational statistical frameworks on wild type Arabidopsis, mutants of active JA receptor (i.e., CORONATINE-INSENSITIVE 1, COI1-1) and downstream transcription factor (i.e., MYC2) to navigate the JA signaling-mediated primary metabolism alterations during herbivory. Pathway and metabolite's chemical class enrichment analysis revealed JA signaling is crucial for constitutive as well as herbivore-induced primary metabolism and topology of their interaction networks. JA signaling majorly modulated alterations of sugars, amino acids and related metabolites. Herbivory-mediated sugar depletion and induction of methionine for aliphatic glucosinolates are also dependent on JA signaling. Taken together, our results demonstrate trails of JA signaling-mediated primary metabolic alterations associated with herbivory.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70035"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142953098","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}
引用次数: 0
Synergistic effects of GmLFYa and GmLFYb on Compound Leaf Development in Soybean.
IF 5.4 2区 生物学
Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70092
Dongfa Wang, Baolin Zhao, Xuan Zhou, Shaoli Zhou, Liling Yang, Yawen Mao, Quanzi Bai, Weiyue Zhao, Mingzhu Sun, Mingli Liu, Zhijia Gu, Liangliang He, Jianghua Chen
{"title":"Synergistic effects of GmLFYa and GmLFYb on Compound Leaf Development in Soybean.","authors":"Dongfa Wang, Baolin Zhao, Xuan Zhou, Shaoli Zhou, Liling Yang, Yawen Mao, Quanzi Bai, Weiyue Zhao, Mingzhu Sun, Mingli Liu, Zhijia Gu, Liangliang He, Jianghua Chen","doi":"10.1111/ppl.70092","DOIUrl":"https://doi.org/10.1111/ppl.70092","url":null,"abstract":"<p><p>Legume leaves exhibit diverse compound forms, with various regulatory mechanisms underlying the development. The transcription factor-encoding KNOXI genes are required to promote leaflet initiation in most compound-leafed angiosperms. In non-IRLC (inverted repeat-lacking clade) legumes, KNOXI are expressed in compound leaf primordia but not in others (IRLC). Recent studies have highlighted LFY genes' role in regulating leaflet initiation across legumes. The LFY functions in leaf development are well understood in IRLC legumes but remain unclear in non-IRLC legumes. Soybean, a major crop belonging to non-IRLC legumes, has limited research on the trifoliate leaf morphogenesis. Here, we comprehensively analyzed soybean trifoliate leaf development and characterized two GmLFY gene copies, GmLFYa and GmLFYb, in compound leaf morphogenesis. Analyzing the loss-of-function mutants revealed that Gmlfya displayed a low frequency of simple-like leaves, while the Gmlfyb showed no visible phenotype. However, the Gmlfya Gmlfyb double mutant predominantly displayed simple-like leaves. Additionally, mutations in two genes also affect floral development: each single mutant exhibited slightly deformed floral organs, while double mutant produced inflorescence-like structures. The transformation from floral meristems to inflorescence-like structures is similar to lfy mutant in Arabidopsis but quite different from M. truncatula and L. japonicus. These findings suggest that the two GmLFY genes in soybean collaboratively regulate both compound leaf and flower morphogenesis. Our study not only creates foundational mutant materials for future research on leaf and flower development in soybean but also reinforces the role of LFY orthologs as master regulators in compound leaf morphogenesis across a broader range of legume taxa than previously recognized.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70092"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143053254","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}
引用次数: 0
GhRac9 improves cotton resistance to Verticillium dahliae via regulating ROS production and lignin content.
IF 5.4 2区 生物学
Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70091
Xincheng Luo, Zongwei Hu, Longyan Chu, Jianping Li, Ziru Tang, Xiangxiang Sun, Hongliu An, Peng Wan, Xiangping Wang, Yazhen Yang, Jianmin Zhang
{"title":"GhRac9 improves cotton resistance to Verticillium dahliae via regulating ROS production and lignin content.","authors":"Xincheng Luo, Zongwei Hu, Longyan Chu, Jianping Li, Ziru Tang, Xiangxiang Sun, Hongliu An, Peng Wan, Xiangping Wang, Yazhen Yang, Jianmin Zhang","doi":"10.1111/ppl.70091","DOIUrl":"https://doi.org/10.1111/ppl.70091","url":null,"abstract":"<p><p>Rac/Rop proteins, a kind of unique small GTPases in plants, play crucial roles in plant growth and development and in response to abiotic and biotic stresses. However, it is poorly understood whether cotton Rac/Rop protein genes are involved in mediating cotton resistance to Verticillium dahliae. Here, we focused on the function and mechanism of cotton Rac/Rop gene GhRac9 in the defense response to Verticillium dahliae infection. The expression level of GhRac9 peaked at 24 h after V. dahliae infection and remained consistently elevated from 24 to 48 h upon SA treatment. Furthermore, silencing GhRac9 using VIGS (Virus-induced gene silence) method attenuated cotton defense response to V. dahliae by reducing ROS (Reactive Oxygen Species) burst, peroxidase activity and lignin content in cotton plants. On the contrary, heterologous overexpression of GhRac9 enhanced Arabidopsis resistance to V. dahliae and significantly increased ROS production in Arabidopsis plants. Furthemore, transient overexpressing of GhRac9 significantly enhanced ROS burst and POD activity in cotton plants. In addition, GhRac9 positively regulated the expression levels of the genes related to SA signaling pathway in cotton plants. In conclusion, GhRac9 functioned as a positive regulator in the cotton defense response to V. dahliae, which provided important insights for breeding new cotton varieties resistant to V. dahliae.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70091"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143060186","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}
引用次数: 0
Dynamic in vivo monitoring of granum structural changes of Ctenanthe setosa (Roscoe) Eichler during drought stress and subsequent recovery.
IF 5.4 2区 生物学
Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.14621
Richard Hembrom, Renáta Ünnep, Éva Sárvári, Gergely Nagy, Katalin Solymosi
{"title":"Dynamic in vivo monitoring of granum structural changes of Ctenanthe setosa (Roscoe) Eichler during drought stress and subsequent recovery.","authors":"Richard Hembrom, Renáta Ünnep, Éva Sárvári, Gergely Nagy, Katalin Solymosi","doi":"10.1111/ppl.14621","DOIUrl":"10.1111/ppl.14621","url":null,"abstract":"<p><p>Investigating the effects of drought stress and subsequent recovery on the structure and function of chloroplasts is essential to understanding how plants adapt to environmental stressors. We investigated Ctenanthe setosa (Roscoe) Eichler, an ornamental plant that can tolerate prolonged drought periods (40 and 49 days of water withdrawal). Conventional biochemical, biophysical, physiological and (ultra)structural methods combined for the first time in a higher plant with in vivo small-angle neutron scattering (SANS) were used to characterize the alterations induced by drought stress and subsequent recovery. Upon drought stress, no significant changes occurred in the chloroplast ultrastructure, chlorophyll content, 77K fluorescence emission spectra and maximal quantum efficiency of PSII (Qy dark), but the actual quantum efficiency of PSII (Qy light) decreased, the amounts of PSI-LHCII complexes and PSII monomers declined, and that of PSII supercomplexes increased. Thickness of the leaf and of the adaxial hypodermis, chloroplast length and granum repeat distance (RD) values decreased upon drought stress, as shown by light microscopy and SANS, respectively. Because of the very slight (nm-range) changes in RD values, the large biological variability (significant differences in RD values among the leaves and studied leaf regions) and the invasive sampling required for this method, transmission electron microscopy (TEM) hardly showed significant differences. On the other side, in situ SANS analyses provided a unique insight in vivo into the fast structural recovery of the granum structure of drought-stressed leaves, which happened already 18 h after re-watering, while functional and biochemical recovery took place on a longer time scale.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e14621"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11754942/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143023969","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}
引用次数: 0
Structure-function relation of cytokinins determines their differential efficiency in mediating tobacco resistance against Pseudomonas syringae. 细胞分裂素的结构-功能关系决定了它们介导烟草对丁香假单胞菌抗性的差异效率。
IF 5.4 2区 生物学
Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70028
Dominik K Großkinsky, Eva M Molin, Federico Bosetto, Kerstin Edelsbrunner, Michal Oravec, Kristýna Večeřová, Jan Tříska, Thomas Roitsch
{"title":"Structure-function relation of cytokinins determines their differential efficiency in mediating tobacco resistance against Pseudomonas syringae.","authors":"Dominik K Großkinsky, Eva M Molin, Federico Bosetto, Kerstin Edelsbrunner, Michal Oravec, Kristýna Večeřová, Jan Tříska, Thomas Roitsch","doi":"10.1111/ppl.70028","DOIUrl":"10.1111/ppl.70028","url":null,"abstract":"<p><p>The classic plant growth-promoting phytohormone cytokinin has been identified and established as a mediator of pathogen resistance in different plant species. However, the resistance effect of structurally different cytokinins appears to vary and may regulate diverse mechanisms to establish resistance. Hence, we comparatively analysed the impact of six different adenine- and phenylurea-type cytokinins on the well-established pathosystem Nicotiana tabacum-Pseudomonas syringae. The efficiency of resistance effects was evaluated based on impacts on the host plant defence response by scoring infection symptoms and the direct impact on the pathogen by assessment of proliferation in planta. To identify common and cytokinin-specific components involved in resistance effects, transcriptome profiling and targeted metabolomics were conducted in leaves treated with the different cytokinins. We observed clearly different potentials of the tested cytokinins in either suppressing infection symptoms or pathogen proliferation. Gene regulation and metabolite analyses revealed cytokinin-type specific impacts on defence components, such as salicylic acid and related signalling, expression of PR proteins, and regulation of specialised metabolism. Cytokinins also strongly affected plant cell physiological parameters, such as a remarkable decrease in amino acid pools. Hence, this study provides comparative information on the efficiency of diverse cytokinins in mediating resistance in one well-studied pathosystem and insights into the specific regulation of resistance effects mediated by different cytokinin molecules. This is particularly relevant for studies on the function of cytokinins or other phytohormones and compounds interacting with cytokinin activities in the context of pathogen infections and other stress scenarios, considering the diverse cytokinins present in plants.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70028"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11672182/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142896579","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}
引用次数: 0
Improving sulforaphane content in broccoli sprouts by applying Se: transcriptome profiling and coexpression network analysis provide insights into the mechanistic response. 利用Se转录组分析和共表达网络分析提高西兰花芽中萝卜硫素的含量,为其机制响应提供了新的见解。
IF 5.4 2区 生物学
Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70037
Shuxiang Mao, Junwei Wang, Zhijun Guo, Huiping Huang, Shengze Wang, Dandan Fei, Juan Liu, Qi Wu, Jin Nie, Qiuyun Wu, Ke Huang
{"title":"Improving sulforaphane content in broccoli sprouts by applying Se: transcriptome profiling and coexpression network analysis provide insights into the mechanistic response.","authors":"Shuxiang Mao, Junwei Wang, Zhijun Guo, Huiping Huang, Shengze Wang, Dandan Fei, Juan Liu, Qi Wu, Jin Nie, Qiuyun Wu, Ke Huang","doi":"10.1111/ppl.70037","DOIUrl":"https://doi.org/10.1111/ppl.70037","url":null,"abstract":"<p><p>Sulforaphane (SF) is a sulfur (S)-containing isothiocyanate found in cruciferous vegetables and is known for its potent anticancer properties. Broccoli sprouts, in particular, are considered safe and healthy dietary choices due to their high SF content and other beneficial biological activities, such as enhanced metabolite ingestion. The application of selenium (Se) is an excellent approach to enhance the abundance of SF. Previous studies have often focused on gene expression and changes in the synthetic substrates of glucoraphanin (RAA) to explain SF variation in response to Se application. However, the regulatory network and other physiological and biochemical reactions involved in the regulation of SF biosynthesis are poorly understood. In this study, Se-treated broccoli sprouts had higher SF and RAA contents; they increased with increasing Se application. Using RNA-seq in combination with KEGG, GO, phenotypic, and WGCNA analyses, it was observed that not only gene expression was induced but also that glutathione serves as an S donor for SF biosynthesis and acts as an oxidative stress reliever as a result of Se treatment. Additionally, a module related to glucosinolate biosynthesis was identified. Yeast one-hybrid system and dual luciferase reporter assay were utilized. These assays demonstrated the hub transcription factors GATA22, ERF12-like, and MYB108 would directly bind to SUR1 promoter and positively regulate its expression. Our study presents the first global overview of the role of GSH metabolism in response to Se for SF biosynthesis, and provides a novel and valuable gene resource for the molecular breeding of high-SF broccoli.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70037"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142953105","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}
引用次数: 0
Deletion of Flv3A facilitates long-term H2 photoproduction in diazotrophic Anabaena sp. PCC 7120.
IF 5.4 2区 生物学
Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70087
Meilin He, Anita Santana-Sánchez, Gábor Szilveszter Tóth, Maria Ermakova, Darius Collard, Sergey Kosourov, Yagut Allahverdiyeva
{"title":"Deletion of Flv3A facilitates long-term H<sub>2</sub> photoproduction in diazotrophic Anabaena sp. PCC 7120.","authors":"Meilin He, Anita Santana-Sánchez, Gábor Szilveszter Tóth, Maria Ermakova, Darius Collard, Sergey Kosourov, Yagut Allahverdiyeva","doi":"10.1111/ppl.70087","DOIUrl":"https://doi.org/10.1111/ppl.70087","url":null,"abstract":"<p><p>Molecular hydrogen (H<sub>2</sub>) is a promising energy carrier, and its production by photosynthetic microorganisms holds substantial potential for advancing renewable energy generation. The nitrogenase-mediated H<sub>2</sub> production using heterocyst-forming cyanobacteria represents a promising approach, as the process utilizes light energy and photosynthetic reductants while being naturally protected from O<sub>2</sub>-rich environments by its restriction to microoxic heterocyst cells. We investigated the impact of deleting the vegetative cell-specific flavodiiron protein, Flv3A, on the long-term H<sub>2</sub> photoproduction of the model heterocyst-forming cyanobacterium Anabaena sp. PCC 7120. The H<sub>2</sub> photoproduction response was evaluated under varying atmospheric conditions, with or without N<sub>2</sub> and O<sub>2</sub>, and compared to the ∆hupL mutant, which is deficient in the large subunit of uptake hydrogenase, and the ∆hupL/flv3A double mutant. Unlike the ΔhupL mutant, H<sub>2</sub> photoproduction in Δflv3A is not enhanced by increased nitrogenase activity or high accumulation of sugars in cells. Our results suggest that the absence of the vegetative cell-localized Flv3A positively affects H<sub>2</sub> photoproduction in heterocysts by simultaneously downregulating hupL expression and enhancing the O<sub>2</sub> tolerance of nitrogenase via a yet unexplored mechanism. These findings advance our understanding of nitrogenase-driven H<sub>2</sub> production and provide a new strategy to address key limitations in long-term photobiological H<sub>2</sub> production.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70087"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143067187","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}
引用次数: 0
Establishment of an Agrobacterium-mediated transformation system for the genetic engineering of Linum grandiflorum Desf. 农杆菌介导的桔梗基因工程转化体系的建立。
IF 5.4 2区 生物学
Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70059
Karol Gad, Hanna Levchuk, Christian Kappel, Michael Lenhard
{"title":"Establishment of an Agrobacterium-mediated transformation system for the genetic engineering of Linum grandiflorum Desf.","authors":"Karol Gad, Hanna Levchuk, Christian Kappel, Michael Lenhard","doi":"10.1111/ppl.70059","DOIUrl":"10.1111/ppl.70059","url":null,"abstract":"<p><p>Genetic transformation is a powerful tool in plant biotechnology. However, its application is limited to species that are well-studied and easy to transform. There is a critical need to establish transformation protocols for non-model species. A stable transformation method using Agrobacterium rhizogenes for hairy root transformation and regeneration of transgenic Linum grandiflorum was established. This protocol shows the successful co-transformation of different T-DNA fragments from both the native Ri plasmid and the binary vector with the reporter gene. Hairy roots were produced after inoculation with Agrobacterium rhizogenes from which later shoots were formed from the callus, and subsequently, whole plants were regenerated. This protocol significantly facilitates genomic studies in Linum grandiflorum, particularly in investigating genes at the S-locus supergene, which are crucial for understanding self-incompatibility. Moreover, the established transformation method enables the production of hairy root lines, which can be utilized for the biosynthesis of medically useful and commercially valuable plant metabolites.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70059"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11744441/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009983","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}
引用次数: 0
Response of an obligate CAM plant to competition and increased watering intervals.
IF 5.4 2区 生物学
Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70093
Jingjing Fan, Zhengyu Wang, Chengyi Tu, Zhenglin Lv, Shuting Liu, Ying Fan
{"title":"Response of an obligate CAM plant to competition and increased watering intervals.","authors":"Jingjing Fan, Zhengyu Wang, Chengyi Tu, Zhenglin Lv, Shuting Liu, Ying Fan","doi":"10.1111/ppl.70093","DOIUrl":"https://doi.org/10.1111/ppl.70093","url":null,"abstract":"<p><p>Climate change has exacerbated precipitation variability, profoundly impacting vegetation dynamics and community structures in arid ecosystems. There remains a notable knowledge gap regarding the ecological effects of altered precipitation on crassulacean acid metabolism (CAM) plants and their interactions with other photosynthetic types. This study investigated the response of the typical obligate CAM plant Orostachys fimbriata to extended watering intervals (WI4-WI8) and various competitive patterns (M<sub>1</sub>-M<sub>4</sub>) with the C<sub>3</sub> grass Melilotus officinalis and the C<sub>4</sub> grass Setaria viridis through greenhouse experiments. The results showed that: (1) In species mixtures, CAM plants had slightly reduced the total biomass (TB) compared to monocultures, yet maintained competitiveness by increasing the root-to-shoot biomass (R:S) ratio, stabilizing plant height, and sustaining their photosynthetic rates. (2) As watering intervals increased, CAM plants adapted by further elevating the R:S ratio, reducing height, and decreasing aboveground biomass. However, their height, CO<sub>2</sub> assimilation rate, and above- and below-ground biomass were significantly suppressed, particularly when coexisting with C<sub>4</sub> plants. More extreme watering regime caused a 47.6% decrease in TB of CAM plants in M<sub>4</sub>, while C<sub>3</sub> and C<sub>4</sub> grasses declined by 53.2% and 37.8%, respectively. (3) Given the predicted extension of drought intervals and the intensification of individual rainfall events under future climate conditions, the competitive pressure from C<sub>4</sub> plants with high drought tolerance and resource acquisition advantages may limit the expansion potential of CAM plants in drylands. This study enhances the understanding of adaptive mechanisms of CAM plants competing and coexisting with grasses under variable environments, providing scientific bases for predicting arid ecosystem dynamics.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70093"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143060189","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}
引用次数: 0
Fungal endophytes modulate the negative effects induced by Persistent Organic Pollutants in the antarctic plant Colobanthus quitensis.
IF 5.4 2区 生物学
Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70079
Claudia Egas, Gabriel Ballesteros, Cristóbal Galbán-Malagón, Thais Luarte, Sergio Guajardo-Leiva, Eduardo Castro-Nallar, Marco A Molina-Montenegro
{"title":"Fungal endophytes modulate the negative effects induced by Persistent Organic Pollutants in the antarctic plant Colobanthus quitensis.","authors":"Claudia Egas, Gabriel Ballesteros, Cristóbal Galbán-Malagón, Thais Luarte, Sergio Guajardo-Leiva, Eduardo Castro-Nallar, Marco A Molina-Montenegro","doi":"10.1111/ppl.70079","DOIUrl":"https://doi.org/10.1111/ppl.70079","url":null,"abstract":"<p><p>Antarctica has one of the most sensitive ecosystems to the negative effects of Persistent Organic Pollutants (POPs) on its biodiversity. This is because of the lower temperatures and the persistence of POPs that promote their accumulation or even biomagnification. However, the impact of POPs on vascular plants is unknown. Moreover, fungal symbionts could modulate the effects on host plants to cope with this stress factor. This study investigates the molecular and ecophysiological responses of the Sub-Antarctic and Antarctic plant Colobanthus quitensis to POPs in different populations along a latitudinal gradient (53°- 67° S), emphasizing the role of endophytic fungi. The results show that exposure of POPs in C. quitensis generates oxidative stress and alters its ecophysiological performance. Nevertheless, C. quitensis in association with fungal endophytes and POPs exposure, shows lower lipid peroxidation, higher proline content and higher photosynthetic capacity, as well as higher biomass and survival percentage, compared to plants in the absence of fungal endophytes. On the other hand, the antarctic plant population (67°S) with endophytic fungi presents better stress modulating upon POPs exposure. Endophytic fungi would be more necessary for plant performance towards higher latitudes with extreme conditions, contributing significantly to their general functional adaptation. We develop a transcriptomics analyses n the C. quitensis-fungal endophytes association from the Peninsula population. We observed that fungal endophytes promote tolerance to POPs stress through upregulated genes for the redox regulation based on ascorbate and scavenging mechanisms (peroxidases, MDAR, VTC4, CCS), transformation (monooxygenases) and conjugation of compounds or metabolites (glutathione transferases, glycosyltransferases, S-transferases), and the storage or elimination of conjugates (ABC transporters, C and G family) that contribute to detoxification cell. This work highlights the contribution of endophytic fungi to plant resistance in situations of environmental stress, especially in extreme conditions such as in antarctica exposed to anthropogenic impact. The implications of these findings are relevant for the biosecurity of one of the last pristine bastions worldwide.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70079"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047629","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}
引用次数: 0
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