Physiologia plantarum最新文献_第4页

Mixed Cultivation With Siberian Alder Worsens the Negative Impact of Salt Exposure on Growth and Major Physiological Processes of Black Locust Plants. 与西伯利亚桤木混作加重了盐暴露对刺槐植株生长和主要生理过程的负面影响。

IF 3.6 2区生物学

Physiologia plantarum Pub Date : 2025-09-01 DOI: 10.1111/ppl.70494

Sumei Li, Ruijie Zhang, Qiuling Hui, Heinz Rennenberg, Bin Hu

{"title":"Mixed Cultivation With Siberian Alder Worsens the Negative Impact of Salt Exposure on Growth and Major Physiological Processes of Black Locust Plants.","authors":"Sumei Li, Ruijie Zhang, Qiuling Hui, Heinz Rennenberg, Bin Hu","doi":"10.1111/ppl.70494","DOIUrl":"https://doi.org/10.1111/ppl.70494","url":null,"abstract":"Salinity is a major threat that can greatly affect the growth and development of plants. Mixed planting has been shown to effectively improve the salinity tolerance of tree species. However, it is still unknown whether admixing alder trees promotes the growth and development of N2-fixing Robinia pseudoacacia on saline soil. To address this question, single-planted Robinia seedlings and Robinia seedlings mixed with Siberian alder (Alnus hirsuta Turcz. ex Rupr.) were subjected to salt exposure, and growth parameters, photosynthetic characteristics, cation contents and ratios, osmoregulation by compatible solutes, and antioxidant metabolism were analyzed. The results showed that salt exposure significantly reduced whole-plant biomass, net photosynthesis rate, total chlorophyll content, and nodule nitrogenase activity of Robinia at both single and mixed planting with Siberian alder. Salt exposure significantly increased the accumulation of Na+, malondialdehyde, and hydrogen peroxide in the leaves of both single and mixed planted Robinia. Under salt exposure, mixed planting significantly inhibited the growth and nitrogen fixation capacity of Robinia due to interspecific competition, indicated by reduced biomass accumulation and photosynthetic efficiency compared with single planting. In addition, mixed planting exacerbated Na+ toxicity in Robinia roots and enhanced oxidative stress in Robinia leaves and roots, indicated by elevated hydrogen peroxide contents. These results indicate that mixing Robinia with Siberian alder at the seedling stage not only inhibits the nitrogen fixation capacity of Robinia but also reduces its salinity tolerance. They provide an important theoretical reference for the establishment of mixed Robinia forests at the seedling stage, particularly in salinized soils.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 5","pages":"e70494"},"PeriodicalIF":3.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144965079","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

Combined Soil and Atmospheric Cadmium Stresses: Cadmium Accumulation and Physiological Responses in Nicotiana tabacum L. 土壤和大气镉复合胁迫：烟草镉的积累和生理响应。

IF 3.6 2区生物学

Physiologia plantarum Pub Date : 2025-09-01 DOI: 10.1111/ppl.70484

Peidang Fan, Hang Shi, Huaxin Ling, Bo Li, Fumo Yang, Chengtao Huang, Liuyi Zhang

{"title":"Combined Soil and Atmospheric Cadmium Stresses: Cadmium Accumulation and Physiological Responses in Nicotiana tabacum L.","authors":"Peidang Fan, Hang Shi, Huaxin Ling, Bo Li, Fumo Yang, Chengtao Huang, Liuyi Zhang","doi":"10.1111/ppl.70484","DOIUrl":"https://doi.org/10.1111/ppl.70484","url":null,"abstract":"Cadmium (Cd) pollution threatens agricultural ecosystems and human health, yet the combined impacts of atmospheric and soil Cd exposure on plant accumulation dynamics remain underexplored. The investigation focuses on the two main Cd uptake routes, soil-root and atmosphere-leaf, in Nicotiana tabacum L., a commercial crop with a notable ability to hyperaccumulate Cd. Controlled experiments were conducted to simulate realistic exposure conditions, providing insights into how these pathways interact and influence Cd accumulation in plants. The key findings revealed that soil was the dominant Cd source (88.29%-92.63%), while atmospheric deposition contributed 3.54%-7.36%, with leaves acting as the primary sink (> 70% of total Cd). Subcellular distribution identified the cell walls (48%-75%) and vacuoles (21%-50%) as critical sequestration sites, mediated by pectin binding and phytochelatin-Cd complexes. Low atmospheric Cd enhanced biomass (10%) and antioxidant activity, whereas combined high stress (AHSH group) suppressed growth (plant height (PH) 18%, root length (RL) 26%) and chlorophyll synthesis (29%), alongside oxidative stress escalation (H2O2 53%, MDA 147%). Antioxidant enzymes (SOD, CAT, APX) exhibited threshold-dependent responses, being stimulated at low Cd levels but suppressed at high doses, which indicates limits to the detoxification capacity. These results underscore atmospheric Cd as a non-negligible risk factor in tobacco-growing regions, advocating for integrated soil-air monitoring frameworks to safeguard crop safety and ecosystem health.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 5","pages":"e70484"},"PeriodicalIF":3.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144965145","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

Transcriptome Analysis Reveals the Mechanism of Early Branching of Balsa (Ochroma lagopus Swartz). Balsa （Ochroma lagopus Swartz）早期分支机制的转录组分析。

IF 3.6 2区生物学

Physiologia plantarum Pub Date : 2025-09-01 DOI: 10.1111/ppl.70509

Yiwen Qian, Xue Bai, Ping Huang, Lun Wang, Wanxian Zhu, Yiqing Su, Mingyong Tang

{"title":"Transcriptome Analysis Reveals the Mechanism of Early Branching of Balsa (Ochroma lagopus Swartz).","authors":"Yiwen Qian, Xue Bai, Ping Huang, Lun Wang, Wanxian Zhu, Yiqing Su, Mingyong Tang","doi":"10.1111/ppl.70509","DOIUrl":"https://doi.org/10.1111/ppl.70509","url":null,"abstract":"Balsa (Ochroma lagopus Swartz), the world's lightest wood and a crucial material in wind turbine blades, holds significant potential to contribute to carbon neutrality efforts when cultivated in tropical areas such as Xishuangbanna, China. However, balsa trees planted in Xishuangbanna exhibit early branching, resulting in reduced wood yield. Our study investigated the pivotal factors in regulating shoot apical dominance and branching by comparing an early-branching cultivar from Indonesia with a late-branching cultivar from Ecuador. Through transcriptome analysis, we found that the decreased expression of genes putatively involved in shoot apical meristem (SAM) activity, including putative orthologs of WUSCHEL (OlWUS-like), SHOOTMERISTEMLESS (OlSTM-like), and CLAVATA3 (OlCLV3-like), was associated with shoot apical dominance and lateral meristem development in early-branch cultivars. Additionally, the increased expression of flowering-related genes, including putative orthologs of FLOWERING LOCUS T (OlFT-like), LEAFY (OlLFY-like), and MADS-box genes, was implicated in flowering meristem formation and branch initiation. Notably, we identified a highly expressed OlFT-like gene that may participate in flowering and branching. Overexpression of OlFT-like in Jatropha curcas inhibited the longitudinal growth of the main stem, promoted branching, and intrinsically decreased the expression of genes involved in the control of meristematic activity (JcWUSa, JcWUSb, and JcCLV3). In summary, OlFT-like was identified as a key regulator of flowering and branching in balsa. Our in-depth understanding of the branching of perennials provides novel insights for the early screening of elite ecotypes and molecular breeding of balsa.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 5","pages":"e70509"},"PeriodicalIF":3.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145030328","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

Auxin Gradients Determine Reproductive Development in Pea (Pisum sativum). 生长素梯度对豌豆生殖发育的影响。

IF 3.6 2区生物学

Physiologia plantarum Pub Date : 2025-09-01 DOI: 10.1111/ppl.70497

Dilini D Adihetty, Harleen Kaur, Charitha P A Jayasinghege, Dennis M Reinecke, Jocelyn A Ozga

{"title":"Auxin Gradients Determine Reproductive Development in Pea (Pisum sativum).","authors":"Dilini D Adihetty, Harleen Kaur, Charitha P A Jayasinghege, Dennis M Reinecke, Jocelyn A Ozga","doi":"10.1111/ppl.70497","DOIUrl":"10.1111/ppl.70497","url":null,"abstract":"Auxins are involved in the regulation of fruit set and development; however, the role of IAA is unclear in pea (Pisum sativum) since the endogenous auxin 4-Cl-IAA appears to be the auxin stimulating ovary (pericarp) growth. To further understand the role of auxins during fruit development, auxin localization, quantitation, transport, and gene expression activity were assessed in this model legume species. IAA levels and auxin activity (DR5::β-Glucuronidase [GUS] staining and enzyme activity) were substantially reduced in the pericarp vascular tissues, pedicels, and peduncles of fruit upon seed removal, reflecting auxin transport streams derived from the seeds through these tissues. Seed removal modified auxin response factor PsARF7/19, PsARF8, and PsARF5 transcript levels in the pericarp and attachment tissues in a manner suggesting tissue-specific regulation of their expression by auxin and ethylene. Pericarp application of polar auxin transport inhibitor N-1-naphthylphthalamic acid (NPA) increased auxin (DR5::GUS staining/enzyme) activity within pericarps of seeded, but not deseeded fruits, and NPA application to the peduncle modified IAA levels and DR5::GUS staining/enzyme activity, suggesting polar auxin transport from the seeds to surrounding tissues. However, the NPA application did not induce parthenocarpic fruit growth as in other model species. These data support that in pea, auxin is transported from the seeds to adjacent tissues at least partially through NPA-sensitive pathways, that seed-derived IAA plays a role in maintaining auxin gradients through the pericarp and attachment tissues likely for establishing the seed as a major sink, and that auxin and ethylene pathways interact to determine the fate of fruit development.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 5","pages":"e70497"},"PeriodicalIF":3.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12420533/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145030379","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

Meta-Analysis of Iron Excess Stress in Rice: Genes and Mechanisms of Tolerance to Acidic Soil. 水稻铁胁迫的荟萃分析：耐酸性土壤的基因和机制。

IF 3.6 2区生物学

Physiologia plantarum Pub Date : 2025-09-01 DOI: 10.1111/ppl.70473

Divya Gupta, Sanjib Kumar Panda, Petra Bauer

{"title":"Meta-Analysis of Iron Excess Stress in Rice: Genes and Mechanisms of Tolerance to Acidic Soil.","authors":"Divya Gupta, Sanjib Kumar Panda, Petra Bauer","doi":"10.1111/ppl.70473","DOIUrl":"https://doi.org/10.1111/ppl.70473","url":null,"abstract":"Iron toxicity, predominantly stemming from excessive levels of ferrous iron (Fe2+) in acidic soils, poses a considerable challenge for crop production. Hypoxic conditions induced by waterlogging can exacerbate Fe2+ availability, which significantly impacts the cultivation and productivity of rice (Oryza sativa), a staple food for millions worldwide. In several regions across South America, Africa, and Asia, the prevalence of acidic soils results in elevated Fe2+ levels leading to iron toxicity, thereby hindering rice yield. Some regional rice varieties demonstrate a notable adaptation to high iron conditions, offering insights into the tolerance mechanisms through comparative physiology and transcriptomic studies. This review synthesizes the various strategies employed by rice plants to mitigate iron toxicity stress, with a focus on the regulation of essential genes and genetic pathways associated with iron transport and homeostasis. We place particular emphasis on the co-expression networks and predicted subcellular localization of the proteins encoded by these genes. A meta-analysis of differential gene expression data gathered from studies involving six distinct rice lines-either tolerant or sensitive-reveals significant influences of plant genotype, developmental stage, and treatment type on the expression patterns, leading to the identification of robust marker genes associated with the iron excess response. Our comprehensive literature review uncovers several critical knowledge gaps, establishing a framework for developing novel approaches aimed at elucidating the molecular mechanisms underpinning iron stress tolerance. These insights are vital for enhancing rice yield in iron-rich, acidic soils, ultimately contributing to improved food security in affected regions.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 5","pages":"e70473"},"PeriodicalIF":3.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12391641/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144965060","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

Biochemical and Biophysical Investigation of a Calmodulin-Like Protein From Glycine max Delineates Its Role as a Calcium Sensor During Herbivory. 从甘氨酸中提取的钙调素样蛋白的生化和生物物理研究描述了它在草食过程中作为钙传感器的作用。

IF 3.6 2区生物学

Physiologia plantarum Pub Date : 2025-09-01 DOI: 10.1111/ppl.70480

Manisha Yadav, Indrakant Kumar Singh, Md Imtaiyaz Hassan, Archana Singh

{"title":"Biochemical and Biophysical Investigation of a Calmodulin-Like Protein From Glycine max Delineates Its Role as a Calcium Sensor During Herbivory.","authors":"Manisha Yadav, Indrakant Kumar Singh, Md Imtaiyaz Hassan, Archana Singh","doi":"10.1111/ppl.70480","DOIUrl":"https://doi.org/10.1111/ppl.70480","url":null,"abstract":"The environment surrounding plants is far from stable, compelling the plant to perceive and adapt to numerous biotic and abiotic constraints, including insect attacks. The perception of a feeding insect typically entails the identification of herbivore-associated molecular patterns causing a sequential increase in cytosolic Ca2+ levels. Calmodulin-like proteins (CMLs) are Ca2+ sensor proteins with conserved EF-hands, which decode Ca2+ signals to generate a stress-specific response. Although few of the CMLs have been investigated and their role in plant defence has been deciphered in model plants, the role of CMLs as a Ca2+ sensor protein and their interaction mechanism with calcium and downstream targets remains poorly understood in leguminous crop plants. Herein, we demonstrated the presence of a Ca2+ signature in Glycine max during herbivory. Gene expression analysis of GmCML77 (a member of the CML family) indicated its upregulation during S. litura infestation. Phylogenetic analysis and in silico studies predicted GmCML77 as a Ca2+ binding protein. Employing computational modelling and MD simulations, we showed that GmCML77 has predominantly α-helical conformation with 3 functional Ca2+ binding loops. Also, Ca2+ binding initiates an expansion of tertiary structure, leading to the exposure of hydrophobic residues that may be implicated in its interaction with target proteins. Moreover, gel shift assay and CD spectroscopy results confirmed the Ca2+ binding ability of GmCML77. Our study demonstrated that GmCML77 is a functional calcium-binding protein, which exhibits conformational changes on Ca2+ binding and acts as a Ca2+ sensor during insect infestation.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 5","pages":"e70480"},"PeriodicalIF":3.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144965096","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

Melatonin's Role in Enhancing Waterlogging Tolerance in Plants: Current Understanding and Future Directions. 褪黑素在提高植物耐涝能力中的作用：目前的认识和未来的方向。

IF 3.6 2区生物学

Physiologia plantarum Pub Date : 2025-09-01 DOI: 10.1111/ppl.70499

Mohammad Shah Jahan, Md Mahadi Hasan, Abu Bakar Siddique, Saeedeh Zarbakhsh, Maha M Hamada, Md Arif Hussain, Dilfuza Jabborova, Francisco J Corpas

{"title":"Melatonin's Role in Enhancing Waterlogging Tolerance in Plants: Current Understanding and Future Directions.","authors":"Mohammad Shah Jahan, Md Mahadi Hasan, Abu Bakar Siddique, Saeedeh Zarbakhsh, Maha M Hamada, Md Arif Hussain, Dilfuza Jabborova, Francisco J Corpas","doi":"10.1111/ppl.70499","DOIUrl":"https://doi.org/10.1111/ppl.70499","url":null,"abstract":"Waterlogging, increasingly intensified by climate change, limits oxygen availability in the root zone, disrupting carbon and sugar metabolism, leading to energy deficits and oxidative stress that ultimately impair plant growth and productivity. Melatonin, a versatile signaling molecule, mitigates waterlogging-induced stress by enhancing anaerobic respiration and fermentation under oxygen-deprived conditions, upregulating stress-responsive genes, and restoring energy balance through optimized sugar metabolism. It also reduces oxidative damage by strengthening the antioxidant defense system and further improves stress tolerance by modulating phytohormone signaling and influencing rhizosphere microbiome dynamics. However, while melatonin's role in other abiotic stresses is well documented, its molecular mechanisms in conferring waterlogging tolerance, particularly the regulation of transcriptional and epigenetic processes and plant-microbe interaction, remain underexplored. This review synthesizes current knowledge on melatonin's protective mechanisms against waterlogging stress, uniquely integrating insights across physiological, molecular, and ecological dimensions. It addresses a critical research gap by highlighting the underexplored interplay between melatonin and waterlogging-specific responses, offering a novel perspective on its multifaceted roles in plant adaptation. Future research should prioritize elucidating melatonin's influence on transcriptional regulation, epigenetic reprogramming, and plant-microbiome interactions under waterlogged conditions. Moreover, translating these insights into practical, melatonin-based agricultural strategies is essential for developing waterlogging-resilient crops and promoting sustainable farming systems in vulnerable regions.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 5","pages":"e70499"},"PeriodicalIF":3.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145023931","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

Molecular Insights of Phytohormone-Like Small Biomolecules for Microalgae-Mediated Heavy Metal Bioremediation. 植物激素类小生物分子在微藻介导重金属生物修复中的应用。

IF 3.6 2区生物学

Physiologia plantarum Pub Date : 2025-09-01 DOI: 10.1111/ppl.70506

Kabari Krishna Borah, Prabhakar Semwal, Vinod Kumar, Mikhail S Vlaskin, Manisha Nanda

{"title":"Molecular Insights of Phytohormone-Like Small Biomolecules for Microalgae-Mediated Heavy Metal Bioremediation.","authors":"Kabari Krishna Borah, Prabhakar Semwal, Vinod Kumar, Mikhail S Vlaskin, Manisha Nanda","doi":"10.1111/ppl.70506","DOIUrl":"https://doi.org/10.1111/ppl.70506","url":null,"abstract":"Environmental sustainability is seriously threatened by the discharge of wastewater containing hazardous heavy metals (such as Cr, Cd, As, Hg, etc.). The utilization of microalgae has recently come to light as a viable, environmentally acceptable method for removing heavy metals from contaminated sites. Certain small biomolecules that resemble phytohormones can be beneficial in microalgal biotechnology as they control biological processes and signal transduction to increase stress tolerance and simultaneously upregulate the production of beneficial metabolites. As a result, they make good candidates for bioremediation and an effective vector for removing heavy metal pollutants from the environment. Melatonin, γ-aminobutyric acid (GABA), polyamines, and glycine-betaine are small biomolecules that act as signaling molecules or regulators in microalgae. They play crucial roles in controlling cell development, metabolism, stress resistance, heavy metal accumulation, and redox homeostasis. The potential of phytohormone-like small biomolecules and their incorporation into microalgal systems has been immensely explored by researchers across the globe. However, most studies have reported compromised photosynthetic efficiency in the targeted microalgae and repressed metabolite accumulation. There is then the need for developing cultivation methods without compromising cell viability and photosynthetic efficiency. Therefore, there is a greater need to understand the underlying mechanisms controlling cell proliferation and heavy metal bioaccumulation through the application of phytohormone-like small biomolecules. The current review aims to explore the efficacy of phytohormone-like small biomolecules in the context of microalgal bioremediation of heavy metals alongside the enhancement of various algal metabolites.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 5","pages":"e70506"},"PeriodicalIF":3.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145034105","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

Wheat Maintains Stem Water Potential During Drought Stress Despite Declining Osmotic Potential. 干旱胁迫下小麦在渗透势下降的情况下保持茎秆水势。

IF 3.6 2区生物学

Physiologia plantarum Pub Date : 2025-09-01 DOI: 10.1111/ppl.70513

Sarah Verbeke, Carmen María Padilla-Díaz, Sarah Lievens, Helena Faveere, Stan Goethals, Zoë Vandekerckhove, Kim Vandewoestijne, Kathy Steppe

{"title":"Wheat Maintains Stem Water Potential During Drought Stress Despite Declining Osmotic Potential.","authors":"Sarah Verbeke, Carmen María Padilla-Díaz, Sarah Lievens, Helena Faveere, Stan Goethals, Zoë Vandekerckhove, Kim Vandewoestijne, Kathy Steppe","doi":"10.1111/ppl.70513","DOIUrl":"https://doi.org/10.1111/ppl.70513","url":null,"abstract":"Plant water potential is one of the most frequently measured variables of plant water status. Stem water potential, often approximated by wrapping the leaves, is assumed to be more stable and a better measure of drought stress than leaf water potential. In wheat (Triticum aestivum L.), the stems cannot be seen as merely water transporting organs; rather, they store high amounts of osmotically active carbohydrates, which are postulated to affect water uptake and storage. This study compared the true stem water potential with the wrapped leaf water potential. One drought-sensitive cultivar (Viking) and two resistant cultivars (Impala and Servus) were subjected to different levels of drought stress. Osmotic potential and water content were also measured to study and compare the hydraulic responses to drought stress in the different cultivars. We found that the wrapped leaf water potential does not match the stem water potential in wheat. Instead, wheat maintains its stem water potential during drought stress. Despite the low osmotic potential in the stem parenchyma, the water potential in the stem xylem did not decline as drought stress progressed. This paradox can be explained by recent findings that not only water potential-driven flow, but also turgor-driven flow occurs in wheat stems. This hypothesis suggests that the carbohydrates in stem parenchyma induce an influx of water, but that this water is transported back out under a hydrostatic gradient, redirecting the water to the developing ear.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 5","pages":"e70513"},"PeriodicalIF":3.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145034107","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

Comparative Study of the Mitochondrial Proteome From Mesophyll, Vascular, and Guard Cells in Response to Carbon Starvation. 响应碳饥饿的叶肉、血管和保卫细胞线粒体蛋白质组的比较研究。

IF 3.6 2区生物学

Physiologia plantarum Pub Date : 2025-09-01 DOI: 10.1111/ppl.70465

Clément Boussardon, Shah Hussain, Olivier Keech

{"title":"Comparative Study of the Mitochondrial Proteome From Mesophyll, Vascular, and Guard Cells in Response to Carbon Starvation.","authors":"Clément Boussardon, Shah Hussain, Olivier Keech","doi":"10.1111/ppl.70465","DOIUrl":"https://doi.org/10.1111/ppl.70465","url":null,"abstract":"A leaf is an organ composed of different tissues that fulfill specific functions. We hypothesized that since cells in vascular or mesophyll tissues as well as in stoma are developmentally tuned to operate their functions, mitochondria from these cells could exhibit significant metabolic differences. Using the IMTACT method, mitochondria were isolated from these three specific cell types, and the subsequent proteomes were analyzed. At steady state, mitochondria from vascular and guard cells had a significantly higher abundance of proteins associated with the mtETC, the TCA cycle, and the metabolic use of amino acids (glutamate, proline, isoleucine, leucine, and valine) as alternative substrates. Intriguingly, the mitochondria from guard cells also had a much lower abundance of proteins involved in the translation machinery, thus raising questions about the efficiency of the mitochondrial protein turnover in these cells. In a second step, we carried out the same comparative analysis, but with plants that were subjected to carbon starvation by placing them in prolonged darkness for three or 6 days. For all cell types studied, an increased abundance of proteins involved in branched-chain amino acid metabolism was detected. However, while guard cell mitochondria underwent a drastic reduction in proteins involved in respiration, translation, and RNA editing, suggesting a sharp downregulation of mitochondrial functions, mitochondrial proteomes from mesophyll and vascular cells did not show many differences, except for an increased arginine/proline/glutamate metabolism. Together, the results reported here support a differential regulation of the mitochondrial metabolism among the cell types constituting a leaf, a difference that is exacerbated upon stress.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 5","pages":"e70465"},"PeriodicalIF":3.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12391860/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144965111","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