Physiologia plantarum最新文献_第2页

Impact of Salinity Duration on Growth, Photosynthesis, Water Relations, and Recovery Capacity Reveals Adaptive Responses in Hordeum maritimum. 盐度持续时间对海葵生长、光合作用、水分关系和恢复能力的影响

IF 4 2区生物学

Physiologia plantarum Pub Date : 2026-09-01 DOI: 10.1111/ppl.71087

Salma Ferchichi, Kaouthar Jeddi, Fawaz I Alzahrani, Chedly Abdelly, Kadambot H M Siddique, Kamel Hessini

{"title":"Impact of Salinity Duration on Growth, Photosynthesis, Water Relations, and Recovery Capacity Reveals Adaptive Responses in Hordeum maritimum.","authors":"Salma Ferchichi, Kaouthar Jeddi, Fawaz I Alzahrani, Chedly Abdelly, Kadambot H M Siddique, Kamel Hessini","doi":"10.1111/ppl.71087","DOIUrl":"10.1111/ppl.71087","url":null,"abstract":"Although the physiological mechanisms underlying salt tolerance in wild barley (Hordeum maritimum) are relatively well understood, its recovery after salt stress remains poorly characterized. In this pot experiment, plants were exposed to 200 mM NaCl for 0, 15, 30, 45, or 60 days to evaluate changes in growth and water status. Wild barley exhibited high tolerance during the early stages of salt exposure, maintaining normal growth and water balance for up to 30 days. However, longer exposure reduced plant growth and leaf water content, indicating that prolonged salinity eventually compromises plant performance. To cope with salt stress, plants accumulate soluble sugars, proline, and mineral ions, helping maintain water uptake and cell hydration. Mineral ions, particularly sodium (Na+) and chloride (Cl-), contributed most to osmotic adjustment, accounting for up to 87% of the total osmotic adjustment after 60 days of treatment. Salt stress also induced structural modifications in leaf tissues that enhanced water retention and maintained cell function under saline conditions. Importantly, unlike cultivated barley, H. maritimum fully recovered after the salt treatment ended, restoring both growth and water relations. This strong recovery capacity demonstrates remarkable physiological flexibility and adaptation to changing environmental conditions. These findings highlight the adaptive advantage of wild barley in fluctuating saline environments, where efficient osmotic adjustment, flexible cell wall dynamics, and rapid recovery are key adaptive traits. From both physiological and ecological perspectives, H. maritimum represents a valuable model for studying salt tolerance mechanisms and a promising genetic resource for improving crop salinity resilience.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 5","pages":"e71087"},"PeriodicalIF":4.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13523001/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148841067","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

Integrating Plant Physiology and Microbiome Engineering for Climate-Resilient Crops: Bridging Knowledge Gaps in Multi-Stress Tolerance. 整合植物生理学和微生物组工程用于气候适应型作物：弥合多逆境耐受性的知识差距。

IF 4 2区生物学

Physiologia plantarum Pub Date : 2026-09-01 DOI: 10.1111/ppl.71088

Sudip Sengupta, Subhadwip Ghorai, Suvojit Bose, Soham Hazra, Ankur Mukhopadhyay, Arnab Majumdar, Tarit Roychowdhury

{"title":"Integrating Plant Physiology and Microbiome Engineering for Climate-Resilient Crops: Bridging Knowledge Gaps in Multi-Stress Tolerance.","authors":"Sudip Sengupta, Subhadwip Ghorai, Suvojit Bose, Soham Hazra, Ankur Mukhopadhyay, Arnab Majumdar, Tarit Roychowdhury","doi":"10.1111/ppl.71088","DOIUrl":"10.1111/ppl.71088","url":null,"abstract":"Climate change is intensifying the frequency and co-occurrence of abiotic and biotic stresses, posing significant challenges to global crop productivity and stability. Conventional approaches based on single-stress responses are increasingly insufficient for addressing complex field environments where plants experience multiple simultaneous stresses. This review synthesizes current knowledge on plant physiological responses, microbiome interactions, and emerging technological interventions to develop an integrative framework for climate-resilient agriculture. It highlights how stress perception, hormonal regulation, metabolic adjustments, and epigenetic mechanisms collectively shape plant adaptation under multi-stress conditions. The review further examines the role of plant-associated microbiomes in enhancing nutrient acquisition, regulating stress signaling, and improving resilience through mechanisms such as phytohormone modulation, antioxidant activity, and induced systemic resistance. Advances in microbiome engineering, including synthetic microbial communities and computational prediction frameworks, are discussed as promising strategies for improving stress tolerance. In addition, emerging tools such as nanotechnology-assisted delivery systems and biosensing platforms are considered for precision management of plant-microbe systems. By identifying critical knowledge gaps in multi-stress physiology, microbiome assembly, and field-level predictability, this review proposes an interdisciplinary approach that integrates plant physiology, microbial ecology, and technological innovations to support sustainable crop production under changing climatic conditions.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 5","pages":"e71088"},"PeriodicalIF":4.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13547441/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148901076","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

Functional Characterization of the β-Amyrin Synthase Gene Contributing to Cuticular Wax Variation Between Two Blueberry Types. 两种蓝莓表皮蜡变异的β-Amyrin合成酶基因功能特征

IF 4 2区生物学

Physiologia plantarum Pub Date : 2026-09-01 DOI: 10.1111/ppl.71116

Jia Li, Yiduo Wu, Jiayuan Cai, Kai Xu, Yunxiang Zang, Weiwei Zheng

{"title":"Functional Characterization of the β-Amyrin Synthase Gene Contributing to Cuticular Wax Variation Between Two Blueberry Types.","authors":"Jia Li, Yiduo Wu, Jiayuan Cai, Kai Xu, Yunxiang Zang, Weiwei Zheng","doi":"10.1111/ppl.71116","DOIUrl":"https://doi.org/10.1111/ppl.71116","url":null,"abstract":"Cuticular wax plays a critical role in preserving fruit quality and providing structural protection against external stresses in plants. Rabbiteye blueberry and southern highbush blueberry are the main types of cultivated blueberries grown in southern China, exhibiting substantial differences in fruit ripening, management requirements, and stress resistance. In this study, rabbiteye blueberry cv. Titan and southern highbush blueberry cv. Emerald were examined to assess variation in cuticular wax and to functionally characterize candidate genes involved in β-amyrin synthesis. The wax matrix of both types comprised fatty acids, alkanes, primary alcohols, ketones, esters, and triterpenes, with triterpenes constituting a major functional component. β-amyrin was the predominant triterpenoid, accounting for 63.1% and 86.1% of total triterpenes in Titan and Emerald, respectively. A comprehensive analysis of β-amyrin synthase genes (BASs) was conducted, and their phylogenetic relationships, gene structures, and chromosomal localization were studied. RNA-seq profiling identified VaBAS355 as a key candidate gene, and its expression pattern and subcellular localization were subsequently evaluated. The heterologous and homologous transient expression of VaBAS355 resulted in increased β-amyrin accumulation in tobacco and blueberry. Taken together, our results provide a foundation for elucidating the functional roles of BASs and their regulatory mechanisms, especially in the processes of fruit development and resistance to environmental stresses.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 5","pages":"e71116"},"PeriodicalIF":4.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149025878","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

Exogenous Dopamine and MdTyDC Overexpression Enhance Copper Stress Resistance in Apple. 外源多巴胺和MdTyDC过表达增强苹果对铜胁迫的抗性

IF 4 2区生物学

Physiologia plantarum Pub Date : 2026-09-01 DOI: 10.1111/ppl.71122

Zhongwen Tang, Xuewen Li, Xiaojian Ma, Bin Xie, Sumiao Yang, Lizhe Qin, Fengwang Ma, Chao Li, Zhijun Zhang

{"title":"Exogenous Dopamine and MdTyDC Overexpression Enhance Copper Stress Resistance in Apple.","authors":"Zhongwen Tang, Xuewen Li, Xiaojian Ma, Bin Xie, Sumiao Yang, Lizhe Qin, Fengwang Ma, Chao Li, Zhijun Zhang","doi":"10.1111/ppl.71122","DOIUrl":"https://doi.org/10.1111/ppl.71122","url":null,"abstract":"Excess copper (Cu) causes significant abiotic stress and toxicity in plants, severely inhibiting the growth of apples. Dopamine (DA) and its key synthesis enzyme, tyrosine decarboxylase (TyDC), are known to play vital roles in alleviating various abiotic stresses; yet, their function in plant heavy metal detoxification is not well understood. To bridge this gap and explore novel strategies for preventing heavy metal pollution in orchards, this study employed seedlings of Malus hupehensis and MdTyDC-overexpressing apple plants as experimental materials. A pot experiment was conducted under controlled greenhouse conditions for 45 days, in which the soil was irrigated with CuSO₄ solution at concentrations of 0 and 500 μmol l-1, and treated with 100 μmol l-1 of DA. The results showed that exogenous DA and MdTyDC significantly enhanced plant tolerance to Cu stress and alleviated the inhibition of plant growth and root development caused by Cu stress, improved photosynthetic efficiency, enhanced antioxidant enzyme activity, and reduced reactive oxygen species accumulation. In addition, DA treatment significantly reduced the accumulation of Cu in both the roots and leaves of apple plants, upregulated endogenous hormone levels and free amino acid content. Furthermore, exogenous DA and MdTyDC overexpression enhanced apple adaptation to Cu stress by regulating the expression of multiple genes involved in Cu uptake, transport, and detoxification. In conclusion, exogenous DA and MdTyDC overexpression can effectively mitigate the adverse effects of Cu stress on apple plants, providing a novel solution for the prevention and control of heavy metal pollution in orchards.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 5","pages":"e71122"},"PeriodicalIF":4.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149017788","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

Stomatal Morphology, Leaf Nutrients and Molecular Adaptations Are Associated With Scald Resistance in Barley. 大麦的气孔形态、叶片营养和分子适应与耐烫性的关系。

IF 4 2区生物学

Physiologia plantarum Pub Date : 2026-09-01 DOI: 10.1111/ppl.71117

Usman Ijaz, Muhammad Atif Azeem, Sergey Shabala, Meixue Zhou, Chenchen Zhao

{"title":"Stomatal Morphology, Leaf Nutrients and Molecular Adaptations Are Associated With Scald Resistance in Barley.","authors":"Usman Ijaz, Muhammad Atif Azeem, Sergey Shabala, Meixue Zhou, Chenchen Zhao","doi":"10.1111/ppl.71117","DOIUrl":"10.1111/ppl.71117","url":null,"abstract":"Scald, caused by Rhynchosporium secalis, can reduce grain yield by up to 40% in susceptible cultivars. To investigate physiological and molecular responses associated with scald resistance in barley, we compared a susceptible cultivar, Atlantis, with a resistant cultivar, Yangsimai 3, under uninoculated control and R. secalis-inoculated conditions. Relative to the uninoculated control, Atlantis showed significant reductions in shoot and root length (20.6% and 22.9%), shoot and root dry weight (27.7% and 28.3%), SPAD value (30.9%) and chlorophyll fluorescence (10.8%), whereas Yangsimai 3 showed smaller changes. Under R. secalis inoculation, Yangsimai 3 showed lower stomatal conductance and smaller stomatal pore size, more stable K+ and Ca2+ contents, lower malondialdehyde (MDA) and hydrogen peroxide (H2O2) levels and higher superoxide dismutase (SOD, ~32%), peroxidase (POD, ~41%) and catalase (CAT, ~31%) activities, indicating stronger antioxidant capacity. qRT-PCR analysis further showed generally enhanced gene expression in inoculated Yangsimai 3 involving Ca2+ signalling (HvCAM1, HvCAM24 and HvCDPK3), K+ transport (HvHAK1 and HvGORK), antioxidant defence (HvCDS1, HvSOD2 and HvCAT1), phytohormone signalling (HvAOC, HvLOX2 and HvJIP60), stomatal regulation (HvOST1 and HvSLAC1) and MAPK-mediated immune signalling (HvMPK3 and HvMPK14), whereas reactive oxygen species (ROS) production was more strongly induced in Atlantis. These results suggest that scald resistance in Yangsimai 3 is associated with stomatal regulation, ion homeostasis, antioxidant defence and defence-related gene expression.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 5","pages":"e71117"},"PeriodicalIF":4.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13590239/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149012467","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

Dissecting the Role of Serotonin in Drought Responses of Rocket Plants: From Serotonin Accumulation to Tryptophan-ABA Associations. 解析5 -羟色胺在火箭植物干旱反应中的作用：从5 -羟色胺积累到色氨酸- aba关联。

IF 4 2区生物学

Physiologia plantarum Pub Date : 2026-09-01 DOI: 10.1111/ppl.71106

Sofía Álvarez-Real, Sergi Munné-Bosch, Alba Arabia

{"title":"Dissecting the Role of Serotonin in Drought Responses of Rocket Plants: From Serotonin Accumulation to Tryptophan-ABA Associations.","authors":"Sofía Álvarez-Real, Sergi Munné-Bosch, Alba Arabia","doi":"10.1111/ppl.71106","DOIUrl":"10.1111/ppl.71106","url":null,"abstract":"In recent years, serotonin has been proposed as a signaling molecule in several plant physiological processes, although evidence supporting this function remains limited to date. In particular, its involvement under water deficit conditions is poorly characterised, especially regarding its mechanism of action. This study aimed to determine the implication of serotonin in the response to water stress in rocket plants through three experimental approaches: (1) analysis of endogenous concentrations of indoleamines, tryptophan, serotonin, and melatonin during the acclimation response to stress, (2) evaluation of the dose-dependent effect following its application in seedlings, and (3) analysis of the impact of serotonin application under field conditions. The results showed an increase in serotonin content under water deficit, which was negatively correlated with plant biomass and stomatal conductance, and positively correlated with abscisic acid (ABA) levels. Serotonin application in seedlings led to an improvement in plant water status in a dose-dependent manner but did not alter ABA content. By contrast, this positive effect was not observed under crop conditions. Moreover, when all datasets were integrated, tryptophan, the precursor of serotonin, exhibited a stronger correlation with ABA than serotonin. Taken together, these findings indicate that serotonin does not appear to play a central role in regulating ABA-mediated drought responses. Instead, the stronger association of tryptophan with ABA, together with its role as a precursor of indolamines and auxin, supports a more prominent role for tryptophan metabolism in the drought response than for serotonin itself.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 5","pages":"e71106"},"PeriodicalIF":4.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13545333/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148892191","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

Epigenetic Regulation of Cotton Plant Height by Histone Acetyltransferase GhHAT11 via Hormonal Pathway Modulation. 组蛋白乙酰转移酶GhHAT11通过激素通路调控棉花株高的表观遗传

IF 4 2区生物学

Physiologia plantarum Pub Date : 2026-09-01 DOI: 10.1111/ppl.71112

Xin Zhang, Xingyue Zhong, Yuanxin Li, Yunhao Liusui, Wanwan Fu, Ziyu Wang, Gengqing Huang, Jingbo Zhang, Yanjun Guo, Bo Li

{"title":"Epigenetic Regulation of Cotton Plant Height by Histone Acetyltransferase GhHAT11 via Hormonal Pathway Modulation.","authors":"Xin Zhang, Xingyue Zhong, Yuanxin Li, Yunhao Liusui, Wanwan Fu, Ziyu Wang, Gengqing Huang, Jingbo Zhang, Yanjun Guo, Bo Li","doi":"10.1111/ppl.71112","DOIUrl":"10.1111/ppl.71112","url":null,"abstract":"Histone acetyltransferases (HATs) regulate transcription epigenetically through histone acetylation and play crucial roles in plant development. In this study, we identified a cotton HAT gene, GhHAT11, associated with plant height and investigated its regulatory functions and underlying mechanisms. Tissue-specific expression analysis showed that GhHAT11 was predominantly expressed in stems. Virus-induced gene silencing (VIGS) of GhHAT11 significantly reduced cotton plant height and internode cell length, whereas heterologous overexpression of GhHAT11 in Arabidopsis thaliana increased plant height, confirming its positive role in plant height regulation. Metabolomic and transcriptomic analyses revealed that silencing GhHAT11 decreased auxin and gibberellin (GA) levels, altered the expression of 3233 genes, downregulated genes involved in auxin and GA biosynthesis/signaling, and upregulated genes related to cytokinin metabolism and signaling. Furthermore, GhHAT11 positively regulates the expression of GA biosynthetic genes by maintaining H3K9ac levels at their promoters. Collectively, GhHAT11 regulates cotton plant height by coordinating gibberellin, auxin, and cytokinin pathways through modulation of hormone biosynthesis/signaling gene expression and H3K9ac-mediated control of GA biosynthetic genes.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 5","pages":"e71112"},"PeriodicalIF":4.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13581451/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148983346","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

Timing Matters: Post-Stress Biostimulant Application Promotes Growth Recovery and Physiological Rebalancing in Drought-Stressed Durum Wheat (Triticum durum Desf.). 时间问题：胁迫后生物刺激素应用促进干旱胁迫下硬粒小麦（Triticum Durum Desf）的生长恢复和生理平衡。

IF 4 2区生物学

Physiologia plantarum Pub Date : 2026-09-01 DOI: 10.1111/ppl.71104

Matteo Spada, Moez Maghrebi, Giulia Quagliata, Eleonora Coppa, Roberto Ruggeri, Francesco Rossini, Gianpiero Vigani, Stefania Astolfi

{"title":"Timing Matters: Post-Stress Biostimulant Application Promotes Growth Recovery and Physiological Rebalancing in Drought-Stressed Durum Wheat (Triticum durum Desf.).","authors":"Matteo Spada, Moez Maghrebi, Giulia Quagliata, Eleonora Coppa, Roberto Ruggeri, Francesco Rossini, Gianpiero Vigani, Stefania Astolfi","doi":"10.1111/ppl.71104","DOIUrl":"10.1111/ppl.71104","url":null,"abstract":"As climate change intensifies drought across the Mediterranean basin, safeguarding durum wheat, a cornerstone of regional agriculture, is a global priority. This study evaluated the efficacy of a novel biostimulant, containing glycine betaine, vaterite, and Pseudomonas protegens, with a specific focus on a critical factor: the application timing. To distinguish preventive (pre-stress) and restorative (post-stress) strategies, the treatment was applied either before or after drought induction in drought-sensitive durum wheat seedlings. Drought severely inhibited growth, increased lipid peroxidation, and altered nutrient profiles. The effect of the biostimulant was highly dependent on application timing. Pre-stress application mainly induced tissue-specific metabolic and oxidative responses. In contrast, post-stress treatment promoted recovery of shoot biomass to values comparable to well-watered controls and was associated with increased stomatal density and leaf greenness relative to untreated drought-stressed plants. Post-stress treatment also produced a root morphological profile closer to that of control plants and a shoot ionomic pattern more similar to well-watered plants. Selected stress-responsive genes showed lower transcript levels in biostimulant-treated than in untreated drought-stressed plants, indicating treatment-associated changes in the expression of specific stress-related pathways during recovery. These findings highlight post-stress biostimulant application as a promising timing-dependent strategy to support the recovery of drought-sensitive durum wheat seedlings.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 5","pages":"e71104"},"PeriodicalIF":4.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13575595/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148970727","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

Microbacterium sp.-Nitric Oxide-Ag-NPs Alleviate Mercury Toxicity in Wheat by regulating Redox Homeostasis and Restricting Hg Uptake and Translocation. 微细菌sp.-一氧化氮- ag - nps通过调节氧化还原稳态和限制汞的吸收和转运来减轻小麦汞中毒。

IF 4 2区生物学

Physiologia plantarum Pub Date : 2026-09-01 DOI: 10.1111/ppl.71133

Mohammad Shahid, Mohammad Abul Farah, Temoor Ahmed, Khalid Mashay Al-Anazi, Leonard Koolman

{"title":"Microbacterium sp.-Nitric Oxide-Ag-NPs Alleviate Mercury Toxicity in Wheat by regulating Redox Homeostasis and Restricting Hg Uptake and Translocation.","authors":"Mohammad Shahid, Mohammad Abul Farah, Temoor Ahmed, Khalid Mashay Al-Anazi, Leonard Koolman","doi":"10.1111/ppl.71133","DOIUrl":"https://doi.org/10.1111/ppl.71133","url":null,"abstract":"Mercury (Hg) contamination impairs crop productivity by disrupting photosynthesis, inducing oxidative stress, and increasing Hg accumulation in plant tissues. Sustainable strategies for mitigating Hg phytotoxicity in agriculturally important crops remain needed. This study evaluated the combined effects of a Hg-tolerant plant growth-promoting rhizobacterium (PGPR), Microbacterium sp. PGPB-3 strain, nitric oxide (NO), and silver nanoparticles (Ag-NPs) on Hg-stressed wheat. Wheat plants exposed to increasing Hg concentrations were treated individually or with combinations of PGPB-3 strain, NO, Ag-NPs, and their growth, photosynthetic performance, oxidative stress, antioxidant defense, and Hg accumulation were assessed. The Hg stress markedly reduced wheat growth, biomass, and photosynthetic efficiency while increasing reactive oxygen species (ROS) accumulation and oxidative damage. Under 25 mg Hg kg-1 soil, the combined treatment improved root length (33.3%), root biomass (67.5%), carotenoid content (36.7%), and effective quantum yield of photosystem II (ΦPSII; 25%) relative to Hg-stressed plants. Antioxidant enzyme activities were highest under the PGPB-3 + NO + Ag-NPs treatment. This treatment also reduced Hg accumulation by 81% and strongly restricted Hg translocation to shoots, while improving the tolerance index (TI) by 25%. Overall, combined application of Microbacterium sp. PGPB-3, NO, and Ag-NPs alleviates Hg toxicity by enhancing antioxidant defenses, reducing oxidative damage, and restricting Hg uptake and translocation. These findings highlight the potential of an integrated microbial-chemical-nanomaterial approach for improving wheat resilience under Hg stress.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 5","pages":"e71133"},"PeriodicalIF":4.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149128375","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

A Frosty Genetic Screen Unmasks a Major Regulatory Role for SHORT VEGETATIVE PHASE of Flowering in Response to a Cold Snap. 霜冻遗传筛选揭示了对寒流响应中植物开花期短的主要调控作用。

IF 4 2区生物学

Physiologia plantarum Pub Date : 2026-09-01 DOI: 10.1111/ppl.71146

Ashleigh Edwards, Naveen Shankar, Manuela Jurca, Min Kyun Han, Hans Thordal-Christensen, Stephan Wenkel

{"title":"A Frosty Genetic Screen Unmasks a Major Regulatory Role for SHORT VEGETATIVE PHASE of Flowering in Response to a Cold Snap.","authors":"Ashleigh Edwards, Naveen Shankar, Manuela Jurca, Min Kyun Han, Hans Thordal-Christensen, Stephan Wenkel","doi":"10.1111/ppl.71146","DOIUrl":"10.1111/ppl.71146","url":null,"abstract":"Flowering in plants is controlled by internal and environmental signals, with temperature playing a critical role. Accordingly, Arabidopsis thaliana plants show temperature-dependent variation in flowering time. Because unexpected cold periods can occur at any time, plants have evolved mechanisms to detect such cold snaps and delay flowering. Plants are more cold-tolerant in the vegetative stage, whereas flowers are sensitive and often show reduced reproductive success due to damage to floral structures and gametes. At the molecular level, delayed flowering can be caused by repression of the FLOWERING LOCUS T (FT) gene, and several MADS-box transcription factors repress FT expression in response to cold. In this article, we used a forward genetic screen to investigate how a cold snap affects the transition to flowering. We germinated an A. thaliana EMS M2 population at 20°C, gradually lowered the temperature to 10°C, and selected early-flowering mutants. Whole-genome sequencing identified seven mutant alleles of SHORT VEGETATIVE PHASE (SVP), which we named frosty. Yeast two-hybrid assays showed that the corresponding FROSTY protein isoforms differ in their ability to interact with the MADS-box proteins AGL6 and SOC1. These findings establish a central role for SVP in repressing flowering in response to a cold snap and provide novel alleles, several of which affect splice junctions. Our study offers new insights into the molecular mechanisms that govern temperature-responsive flowering in Arabidopsis and highlights the dynamic interplay between SVP and environmental cues.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"178 5","pages":"e71146"},"PeriodicalIF":4.0,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13654810/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149168048","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