Journal of plant physiology最新文献

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Overexpression of TaMAPK20-2 in Brachypodium reveals freezing and drought tolerance via modulation of sugar synthesis pathway TaMAPK20-2在短柄草中的过表达通过调节糖合成途径揭示其抗旱性和抗冻性。
IF 4.1 3区 生物学
Journal of plant physiology Pub Date : 2026-01-01 Epub Date: 2025-12-11 DOI: 10.1016/j.jplph.2025.154674
Woo Joo Jung , Keun-ha Kim , Jin Seok Yoon , Yong Weon Seo
{"title":"Overexpression of TaMAPK20-2 in Brachypodium reveals freezing and drought tolerance via modulation of sugar synthesis pathway","authors":"Woo Joo Jung ,&nbsp;Keun-ha Kim ,&nbsp;Jin Seok Yoon ,&nbsp;Yong Weon Seo","doi":"10.1016/j.jplph.2025.154674","DOIUrl":"10.1016/j.jplph.2025.154674","url":null,"abstract":"<div><div>Mitogen-activated protein kinase (MAPK) cascades play critical roles in plant responses to abiotic stress, yet their functional characterization in wheat remains limited. In this study, we investigated the function of a cold-responsive wheat MAPK gene, <em>TaMAPK20-2</em>, and its associated cascade components. Expression analysis revealed that <em>TaMAPK20-2</em>, <em>TaMKK5</em>, and <em>TaMPKKK1</em> were significantly upregulated under cold stress. Subcellular localization and BiFC assays confirmed physical interactions among <em>MPKKK1–MKK5–MAPK20-2</em> and <em>MPKKK5–MKK6–MAPK20-2</em> modules, suggesting distinct signaling pathways. To assess its physiological role, we generated transgenic <em>Brachypodium distachyon</em> lines overexpressing <em>TaMAPK20-2</em>. Compared to wild-type (WT) plants, overexpression lines exhibited enhanced tolerance to both freezing and drought stress, as evidenced by higher survival rates, lower water loss, and reduced malondialdehyde (MDA) accumulation. Notably, OE plants showed increased soluble sugar, starch, sucrose, and glucose contents under non-stress conditions, but not fructose. These changes were supported by elevated expression of key carbohydrate metabolism genes (<em>Susy</em>, <em>GolS3</em>, <em>SPS</em>, <em>Invertase</em>) in the absence of stress. Additionally, OE lines showed pre-activation of the ICE–CBF–COR cold tolerance pathway, suggesting a priming effect. These findings demonstrate that <em>TaMAPK20-2</em> positively regulates abiotic stress tolerance by modulating both signaling and metabolic pathways. This study provides new insights into MAPK-mediated stress responses and highlights <em>TaMAPK20-2</em> as a promising target for improving wheat resilience to environmental stress.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"316 ","pages":"Article 154674"},"PeriodicalIF":4.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145756797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Mitigation of compound environmental challenges via orchestrating the ABA- and nitrogen-mediated signaling pathways 通过协调ABA和氮介导的信号通路减轻复合环境挑战
IF 4.1 3区 生物学
Journal of plant physiology Pub Date : 2026-01-01 Epub Date: 2025-11-25 DOI: 10.1016/j.jplph.2025.154663
Kunyang Song , Huijing Yang , Yanxia Zhang , Chengcai Chu
{"title":"Mitigation of compound environmental challenges via orchestrating the ABA- and nitrogen-mediated signaling pathways","authors":"Kunyang Song ,&nbsp;Huijing Yang ,&nbsp;Yanxia Zhang ,&nbsp;Chengcai Chu","doi":"10.1016/j.jplph.2025.154663","DOIUrl":"10.1016/j.jplph.2025.154663","url":null,"abstract":"<div><div>Plants are constantly exposed to fluctuating environmental cues. Abiotic stresses such as drought, salinity, and nutrient deficiency often occur simultaneously, severely compromise crop productivity. Abscisic acid (ABA) plays a central role in plant stress signaling, whereas nitrogen -primarily in the forms of nitrate (NO<sub>3</sub><sup>−</sup>) and ammonium (NH<sub>4</sub><sup>+</sup>) - is indispensable for plant growth and reproduction. Increasing evidence indicates extensive crosstalk between stress and nutrient signaling pathways. Here, we emphasize the synergistic action of the ABA-mediated signaling pathway and NRT1.1B in enabling plants to fine-tune sophisticated, stress-specific responses. The nitrogen sensing components NRT1.1B and NIN-like protein (NLP) transcription factors act as potential hubs connecting nutrient signaling to ABA-mediated stress signaling. These nitrate signaling components may functionally interact with ABA-mediated stress signaling via the activity of SNF1-related protein kinase 2 (SnRK2) or calcium-signaling kinases. Elucidating these integrative mechanisms provides new insights into nutrient-stress crosstalk and offers potential strategies for engineering crops with enhanced resilience under combined environmental challenges.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"316 ","pages":"Article 154663"},"PeriodicalIF":4.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Dissecting the physiology of wild tomatoes under abiotic stress: Dynamic photosynthesis and metabolic adaptations to combined drought and salinity 野生番茄在非生物胁迫下的生理解剖:动态光合作用和对干旱和盐度联合的代谢适应。
IF 4.1 3区 生物学
Journal of plant physiology Pub Date : 2026-01-01 Epub Date: 2025-11-26 DOI: 10.1016/j.jplph.2025.154664
Sofia Spormann , João Neves , Cláudia Pereira , Cristiano Soares , Inês Maria Valente , José António Rodrigues , Viviana Martins , Elias Kaiser , Fernanda Fidalgo
{"title":"Dissecting the physiology of wild tomatoes under abiotic stress: Dynamic photosynthesis and metabolic adaptations to combined drought and salinity","authors":"Sofia Spormann ,&nbsp;João Neves ,&nbsp;Cláudia Pereira ,&nbsp;Cristiano Soares ,&nbsp;Inês Maria Valente ,&nbsp;José António Rodrigues ,&nbsp;Viviana Martins ,&nbsp;Elias Kaiser ,&nbsp;Fernanda Fidalgo","doi":"10.1016/j.jplph.2025.154664","DOIUrl":"10.1016/j.jplph.2025.154664","url":null,"abstract":"<div><div>Tomato (<em>Solanum lycopersicum</em>) is widely cultivated in open fields, being increasingly threatened by environmental constraints like drought and salinity, which disrupt water and nutrient uptake, photosynthesis, redox balance and growth. We examined how the wild relatives <em>Solanum habrochaites</em> LA1223 and <em>Solanum galapagense</em> LA1403 accessions respond to single and combined drought and salinity, in comparison to a modern cultivar. Growth, pigment content, dynamic photosynthesis, primary metabolism, and profiles of amino acids, polyamines, and phytohormones were evaluated to assess their natural resilience relative to the cultivated tomato. Wild tomato species sustained growth better under stress, with an enhanced nitrogen metabolism and osmotic adjustment. In particular, <em>S. habrochaites</em> exhibited higher pigment levels, superior photosynthetic performance, coupled with a rapid stomatal regulation, alongside the accumulation of osmoprotectants such as proline and sugars, leading to improved water use efficiency, likely mediated by salicylic acid. In contrast, <em>S. galapagense</em> showed a more conservative stomatal behavior and constitutively higher leaf spermine and root amino acid contents, being able to maintain biomass production and photosynthesis under water stress. Our results show that, despite their slower growth, wild tomato species display distinct and finely tuned physiological responses to abiotic stress, outperforming a commercial tomato cultivar. These findings emphasize wild species as valuable genetic resources for improving stress tolerance in cultivated tomato.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"316 ","pages":"Article 154664"},"PeriodicalIF":4.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145781142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Autophagy, ROS, and their interplay in plant adaptive responses 自噬、活性氧及其在植物适应性反应中的相互作用
IF 4.1 3区 生物学
Journal of plant physiology Pub Date : 2026-01-01 Epub Date: 2025-12-03 DOI: 10.1016/j.jplph.2025.154671
Chi Zhang , Song-Qi Li , Pengwei Jing , Run-Xin Wu , Yu-Qing Ma , Ji-Xiao Wu , Ru-Feng Song , Wen-Cheng Liu
{"title":"Autophagy, ROS, and their interplay in plant adaptive responses","authors":"Chi Zhang ,&nbsp;Song-Qi Li ,&nbsp;Pengwei Jing ,&nbsp;Run-Xin Wu ,&nbsp;Yu-Qing Ma ,&nbsp;Ji-Xiao Wu ,&nbsp;Ru-Feng Song ,&nbsp;Wen-Cheng Liu","doi":"10.1016/j.jplph.2025.154671","DOIUrl":"10.1016/j.jplph.2025.154671","url":null,"abstract":"<div><div>In ever-changing natural environments, plants have evolved precise and intricate regulatory networks to combat energy deprivation. Under limited energy supply, plants use autophagy to recycle cellular components and sustain vital processes. Autophagy represents an evolutionarily conserved mechanism operating at the subcellular level in eukaryotes. Reactive oxygen species (ROS), traditionally viewed as metabolic byproducts, exert concentration-dependent effects in plants: lower ROS in a controllable concentration range serve as signaling molecules modulating various aspects of plant growth, development and stress responses, whereas over-accumulating ROS induce oxidative damages, threatening plant growth and survival. Although the classification, metabolic dynamics, and multifaceted roles of ROS in plants have been extensively studied, the reciprocal regulatory interplay between ROS signaling and autophagy remains inadequately explored, particularly in plants. This review summarizes recent progress of plant ROS, autophagy, and their interplay, and also provides predictions and perspectives on the potential regulatory mechanisms between ROS and autophagy.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"316 ","pages":"Article 154671"},"PeriodicalIF":4.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Editorial: Squaring the circle: Challenges and breakthroughs in plant sciences 社论:圆的平方:植物科学的挑战和突破
IF 4.1 3区 生物学
Journal of plant physiology Pub Date : 2026-01-01 Epub Date: 2025-12-02 DOI: 10.1016/j.jplph.2025.154668
Uwe Sonnewald , Quan-Sheng Qiu , Herbert J. Kronzucker
{"title":"Editorial: Squaring the circle: Challenges and breakthroughs in plant sciences","authors":"Uwe Sonnewald ,&nbsp;Quan-Sheng Qiu ,&nbsp;Herbert J. Kronzucker","doi":"10.1016/j.jplph.2025.154668","DOIUrl":"10.1016/j.jplph.2025.154668","url":null,"abstract":"","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"316 ","pages":"Article 154668"},"PeriodicalIF":4.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Triumphing over hidden hunger: Redesigning rice (Oryza sativa L.) for enhanced nutraceutical grain composition utilizing multiplexed genome editing 战胜隐藏的饥饿:利用多重基因组编辑重新设计水稻(Oryza sativa L.)以增强营养营养的谷物成分
IF 4.1 3区 生物学
Journal of plant physiology Pub Date : 2026-01-01 Epub Date: 2025-12-04 DOI: 10.1016/j.jplph.2025.154667
Khaled Fathy , Jyotsna Bharti , Sonia Khan Sony , Mamta Nehra , Rashmi Kaul , Bhupendra Rawat , Sudhir K. Sopory , Pawan Kumar Agrawal , Arul Prakash , Tanushri Kaul
{"title":"Triumphing over hidden hunger: Redesigning rice (Oryza sativa L.) for enhanced nutraceutical grain composition utilizing multiplexed genome editing","authors":"Khaled Fathy ,&nbsp;Jyotsna Bharti ,&nbsp;Sonia Khan Sony ,&nbsp;Mamta Nehra ,&nbsp;Rashmi Kaul ,&nbsp;Bhupendra Rawat ,&nbsp;Sudhir K. Sopory ,&nbsp;Pawan Kumar Agrawal ,&nbsp;Arul Prakash ,&nbsp;Tanushri Kaul","doi":"10.1016/j.jplph.2025.154667","DOIUrl":"10.1016/j.jplph.2025.154667","url":null,"abstract":"<div><div>Rice, a staple food crop, is consumed by most of the world's population. Micronutrient malnutrition is a severe health issue, leading to diseases such as cancer, anemia, diabetes, heart disease, and disorders in physical and psychological development. We aimed to create rice with low cadmium in the grain but having high cadmium in shoots, safe biofortified protein, high iron, and zinc using CRISPR/Cas9 and breeding technologies instead of adding drugs. The triple gene Knockout rice lines for two iron sensors and one negative regulator gene for cadmium were created to offer high Fe/Zn and low Cd content for breeders. Multiplexed gene editing mediated biolistic transformation of rice callus, and genotyping was used to check the genetic stability of the edited rice lines. Rice lines were found to have enhanced iron, zinc, and protein content, with concentrations varying based on growth conditions. These lines can be used as phytoremediators for cadmium by storing Cd on plant shoots. The rice-edited plants possessed excellent agro-morphological traits, photosynthetic, and physiological performance. The developed edited indica rice lines have crucial agronomic traits with more nutritional value. Compared to the other lines and the wild wildtype, the genome-edited free Cas9 line 2 showed better traits: 13.48 μg/g (iron), 22.9 μg/g (zinc), and a high protein content, which depends on how bioavailable metals and nutrients are in the soil. The line also had 20.60 g of seeds per 1000 g of plant, a total plant yield of 102.76 g, and 101 days of 50 % flowering. This work offers efficient and precise multiple gene-editing in rice with an effective, sustainable strategy for multi-trait enhancement. The developed lines could be used in breeding programs for sustainable solutions for malnutrition worldwide. The experimental results can provide reference and support for the safe use of edited crops as a diet.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"316 ","pages":"Article 154667"},"PeriodicalIF":4.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145733575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Dose-dependent mutagenic effects of carbon-ion beams in foxtail millet: from phenotypic screening to physiological and molecular mechanisms 碳离子束对谷子的剂量依赖性诱变效应:从表型筛选到生理和分子机制
IF 4.1 3区 生物学
Journal of plant physiology Pub Date : 2026-01-01 Epub Date: 2025-12-09 DOI: 10.1016/j.jplph.2025.154673
Ruiyuan Liu , Yan Zhan , Aiming Cui , Ying Qu , Wenjie Jin , Yan Du , Lixia Yu , Libin Zhou
{"title":"Dose-dependent mutagenic effects of carbon-ion beams in foxtail millet: from phenotypic screening to physiological and molecular mechanisms","authors":"Ruiyuan Liu ,&nbsp;Yan Zhan ,&nbsp;Aiming Cui ,&nbsp;Ying Qu ,&nbsp;Wenjie Jin ,&nbsp;Yan Du ,&nbsp;Lixia Yu ,&nbsp;Libin Zhou","doi":"10.1016/j.jplph.2025.154673","DOIUrl":"10.1016/j.jplph.2025.154673","url":null,"abstract":"<div><div>Foxtail millet (<em>Setaria italica</em> (L.) Beauv) is an important crop for both basic research and sustainable dryland agriculture, due to its rapid growth, high seed yield, strong stress tolerance, and rich nutritional qualities. Multiple mutagenesis approaches have been used to broaden foxtail millet germplasm resources, among which heavy ion beam (HIB) irradiation has emerged as a powerful tool for inducing genetic variations in plant breeding. However, compared with other model species, genetic resources in foxtail millet remain limited, and the specific effects of HIB radiation on this crop are not yet fully understood. In this study, seeds of foxtail millet (<em>Yugu 24</em>) were irradiated using six different carbon-ion beams (CIB, 100 Gy–500 Gy), a commonly used HIB mutagen. Then, the mutagenic effects were evaluated in the M<sub>1</sub> generation, conducted large-scale phenotype screening in the M<sub>2</sub> generation, and analyzed the anatomical, physiological, and molecular mechanisms of stable leaf mutants. M<sub>1</sub> plants exhibited dose-dependent responses, with the optimum CIB dose for <em>Yugu 24</em> ranging from 110 Gy to 140 Gy. From 3100 M2 plants, we identified 56 individuals exhibiting obvious phenotypic variations, resulting in an overall mutation frequency of 1.81 % under CIB irradiation. High frequencies of leaf morphological mutations was observed in the M<sub>2</sub> population. Stable leaf mutants were identified and further characterized in the M<sub>4</sub> generation, which displayed distinct phenotypic variations, including changes in chloroplast structure, stomatal characteristics, and photosynthetic pigment content. Collectively, these findings establish a theoretical foundation for applying CIB irradiation in foxtail millet mutation breeding. Furthermore, the CIB-induced mutant library of <em>Yugu 24</em>provides a valuable resource for future functional genomics research on foxtail millet.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"316 ","pages":"Article 154673"},"PeriodicalIF":4.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145733584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Functional characterization of GmSRS14 in regulating root nodule development of soybean GmSRS14调控大豆根瘤发育的功能研究
IF 4.1 3区 生物学
Journal of plant physiology Pub Date : 2025-12-01 Epub Date: 2025-11-01 DOI: 10.1016/j.jplph.2025.154649
Kangjun Fan , Yue Wu , Yonghua Qin , Hongzao He , Lu Lv , Gang Li , Jiao Liu , Rui Qin , Hong Liu
{"title":"Functional characterization of GmSRS14 in regulating root nodule development of soybean","authors":"Kangjun Fan ,&nbsp;Yue Wu ,&nbsp;Yonghua Qin ,&nbsp;Hongzao He ,&nbsp;Lu Lv ,&nbsp;Gang Li ,&nbsp;Jiao Liu ,&nbsp;Rui Qin ,&nbsp;Hong Liu","doi":"10.1016/j.jplph.2025.154649","DOIUrl":"10.1016/j.jplph.2025.154649","url":null,"abstract":"<div><div>SHORT INTERNODES (SHI)-related sequence (SRS) proteins are plant-specific transcription factors that modulate hormone biosynthesis and signalling. Their contribution to legume–rhizobium symbiosis, however, remains largely unexplored. Phylogenetic and collinearity analyses of legume <em>SRS</em> genes classified 12 subclasses and revealed soybean's evolutionary relationships, including large-scale gene duplication. <em>GmSRS14</em> was specifically highly expressed in root nodules and localised in the nucleus only. Exogenous IAA modulates its expression at low concentrations (1 μM), while high concentrations (100 μM) decrease nodule expression. All ABA concentrations tested (10, 20 and 50 μM) inhibited nodule growth, nitrogenase activity and <em>GmSRS14</em> expression. Functional validation via hairy root transformation demonstrated <em>GmSRS14</em> overexpression (<em>GmSRS14</em>-OE) increased nodule number, weight, and nitrogenase activity, while <em>GmSRS14</em> silencing (<em>GmSRS14-</em>RNAi) suppressed nodulation. This study provides a new idea for breeding soybean varieties with high efficiency of nitrogen fixation.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"315 ","pages":"Article 154649"},"PeriodicalIF":4.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145459031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Cytokinin-induced phenotypic and endogenous phytohormonal dynamics during potato (Solanum tuberosum L.) tuber development in vitro 马铃薯(Solanum tuberosum L.)块茎体外发育过程中细胞分裂素诱导的表型和内源植物激素动态。
IF 4.1 3区 生物学
Journal of plant physiology Pub Date : 2025-12-01 Epub Date: 2025-10-09 DOI: 10.1016/j.jplph.2025.154632
Lixiang Cheng, Jianlong Yuan, Lulu Xia, Zhensan Tang, Feng Zhang
{"title":"Cytokinin-induced phenotypic and endogenous phytohormonal dynamics during potato (Solanum tuberosum L.) tuber development in vitro","authors":"Lixiang Cheng,&nbsp;Jianlong Yuan,&nbsp;Lulu Xia,&nbsp;Zhensan Tang,&nbsp;Feng Zhang","doi":"10.1016/j.jplph.2025.154632","DOIUrl":"10.1016/j.jplph.2025.154632","url":null,"abstract":"<div><div>Cytokinins (CKs) exist in various forms within potato plants, among which the active CKs account for only a minute fraction but play crucial roles in tuber development. In the present study, <em>in vitro</em> potato stolons were exposed to graded concentrations of active CK N<sup>6</sup>-(Δ<sup>2</sup>-isopentenyl)-adenine (2ip) and CK-biosynthesis inhibitor lovastatin, and the phenotypic and endogenous phytohormone dynamics during tuber development were investigated. The results showed that low 2ip concentrations promoted tuberization, with 0.1 μM 2ip exhibiting the strongest inductive effect. The initial time of tuberization was advanced, and the tuberization rate, tuber fresh weight, and tuber diameter significantly increased. With increasing 2ip concentrations, higher levels (&gt;50 μM) inhibited tuberization and markedly elevated the length-to-width ratio of tubers. Inhibiting CK biosynthesis by lovastatin also inhibited tuberization, and even induced the formation of abnormal tubers. Treatment with 0.1 μM 2ip shifted the endogenous hormone balance toward a state that favors tuber formation and development. Levels of active CKs (iP, tZ, and DHZ), IAA, and SA significantly increased, whereas the contents of total jasmonates (JA, JA-Ile, and <em>cis</em>-OPDA), ABA, and inactive CKs (iPR and cZR) decreased. The ratios of active CKs to GA<sub>3</sub>, ABA, or JA, as well as the IAA/ABA and IAA/GA<sub>3</sub> ratios, significantly increased. Inhibition of CK biosynthesis elicited changes in CKs, JAs, and ABA levels, as well as in the associated phytohormone ratios, that were opposite to those observed with 0.1 μM 2ip treatment. Thus this study revealed the specific physiological roles of active CKs in tuber development and provided insights into the mechanisms of tuber development regulated by CKs.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"315 ","pages":"Article 154632"},"PeriodicalIF":4.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145292518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Ca2+ flux in plant responses to abiotic stress 植物对非生物胁迫响应中的Ca2+通量。
IF 4.1 3区 生物学
Journal of plant physiology Pub Date : 2025-12-01 Epub Date: 2025-10-29 DOI: 10.1016/j.jplph.2025.154648
Songsong Jin , Xinling Zhong , Zhangli Hu , Zhonghao Jiang
{"title":"Ca2+ flux in plant responses to abiotic stress","authors":"Songsong Jin ,&nbsp;Xinling Zhong ,&nbsp;Zhangli Hu ,&nbsp;Zhonghao Jiang","doi":"10.1016/j.jplph.2025.154648","DOIUrl":"10.1016/j.jplph.2025.154648","url":null,"abstract":"<div><div>Calcium (Ca<sup>2+</sup>) plays versatile roles in plant growth and development, as well as in responses to environmental stimuli. Abiotic stressors, including abnormal temperature, drought, salt, heavy metals, and flooding, induce instantaneous and rapid free cytosolic Ca<sup>2+</sup> ([Ca<sup>2+</sup>]<sub>cyt</sub>) elevation, known as Ca<sup>2+</sup> signatures. Ca<sup>2+</sup> signatures are stress-specific and regulated by Ca<sup>2+</sup> flux. Ca<sup>2+</sup> flux contains Ca<sup>2+</sup> influx, which initiates Ca<sup>2+</sup> signatures, and Ca<sup>2+</sup> efflux, which terminates them. Ca<sup>2+</sup> flux is achieved through the co-operation of Ca<sup>2+</sup> channels and pumps. Here, we highlight recent advances in Ca<sup>2+</sup> flux and Ca<sup>2+</sup> channel functions in plant responses to abiotic stress. Ca<sup>2+</sup> influx channels in plants include the hyperosmolarity-gated calcium-permeable channel family of proteins (OSCAs), glutamate receptor-like channels (GLRs), cyclic-nucleotide-gated calcium channels (CNGCs), annexins (ANNs), two-pore channels (TPCs), Piezo channels (PZOs), Mid1-complement activity protein channels (MCAs), and mechanosensitive channels of small conductance (MscS)-like proteins (MSLs). Ca<sup>2+</sup> efflux channels mainly contain Ca<sup>2+</sup>-ATPases and Ca<sup>2+</sup> exchangers. Most Ca<sup>2+</sup> channels have been found to participate in plant responses to single abiotic stress, whereas some are reported to be involved in responses to multiple abiotic stresses. This improved knowledge advances our understanding of Ca<sup>2+</sup> signaling in plant responses to abiotic stress and offers new strategies for cultivating stress-resilient crops.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"315 ","pages":"Article 154648"},"PeriodicalIF":4.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145445179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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