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Harnessing Rhodopseudomonas palustris strains for salt stress mitigation in Arabidopsis thaliana. 利用古红假单胞菌缓解拟南芥盐胁迫。
IF 4.8 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-04 DOI: 10.1186/s12870-026-08255-w
Swarnali Roy, Pei-Yin Lin, Ting-Jang Lu, Jen-Chih Chen, Chi-Te Liu

Background: Soil salinity severely limits plant growth and agricultural productivity. 5-Aminolevulinic acid (ALA), a precursor in tetrapyrrole biosynthesis, has been reported to alleviate salinity stress and is frequently proposed as a key component by which purple non-sulfur bacteria enhance plant stress tolerance. This study compared the treatments of three Rhodopseudomonas palustris strains (PS3, TPN1, and YSC3) with ALA under salinity stress to understand the importance of ALA production for their potential ability to alleviate salinity stress, using Arabidopsis thaliana, a salt-sensitive model plant in which NaCl concentrations above 30 mM induce growth inhibition and physiological stress responses, making it well suited for assessing salinity tolerance mechanisms.

Results: Both bacterial and ALA treatments increased the photosynthetic efficiency, root growth, relative water content, and oxidative balance of salt-stressed plants. These treatments maintained chlorophyll biosynthetic capacity and modulation of ion transport-related responses, consistent with improved ionic homeostasis under salinity stress. Among the strains, TPN1 performed the best, exhibiting altered expression of antioxidant genes, reduced lipid peroxidation, and decreased electrolyte leakage, which indicates improved membrane integrity. The outcomes were associated with the ability of TPN1 to maintain halotolerance and key plant growth-promoting traits, including the production of extracellular polysaccharides and indole-3-acetic acid, under high salinity. Notably, strains with comparatively lower extracellular ALA outputs conferred benefits comparable to those observed with ALA treatment, suggesting that plant stress mitigation is not solely dependent on ALA concentration.

Conclusions: We identified ALA-producing R. palustris strains, particularly TPN1, that help enhance plant tolerance to salinity through coordinated changes in ion regulation, antioxidant balance, and photosynthetic performance, and demonstrate that ALA production may not be the primary factor contributing to R. palustris' enhancement of plant salt tolerance.

背景:土壤盐分严重限制植物生长和农业生产力。5-氨基乙酰丙酸(ALA)是四吡咯生物合成的前体,据报道可以缓解盐胁迫,并且经常被认为是紫色非硫细菌增强植物抗逆性的关键成分。本研究比较了3株古红假单胞菌(PS3、TPN1和YSC3)在盐胁迫下ALA的处理,以拟南芥为研究对象,了解ALA的产生对其缓解盐胁迫的潜在能力的重要性。拟南芥是一种盐敏感的模式植物,NaCl浓度超过30 mM会引起生长抑制和生理胁迫反应,因此非常适合用于评估耐盐机制。结果:细菌和ALA处理均能提高盐胁迫植物的光合效率、根系生长、相对含水量和氧化平衡。这些处理维持了叶绿素的生物合成能力和离子转运相关反应的调节,与盐胁迫下离子稳态的改善一致。其中TPN1表现最好,表现出抗氧化基因的表达改变,脂质过氧化减少,电解质泄漏减少,表明膜的完整性得到改善。这些结果与TPN1在高盐度条件下维持耐盐性和关键植物生长促进性状(包括胞外多糖和吲哚-3-乙酸的产生)的能力有关。值得注意的是,细胞外ALA输出相对较低的菌株所获得的益处与ALA处理的菌株相当,这表明植物胁迫缓解并不仅仅依赖于ALA浓度。结论:我们发现产生ALA的古稻菌株,特别是TPN1菌株,通过离子调节、抗氧化平衡和光合性能的协调变化,帮助提高植物对盐的耐受性,并证明ALA的产生可能不是古稻增强植物耐盐性的主要因素。
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引用次数: 0
Location and growth period influence the bioactive compounds of Angelica sinensis (Oliv.) diels: multi-omics insights. 位置和生长期对当归生物活性成分的影响:多组学研究。
IF 4.8 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-03 DOI: 10.1186/s12870-026-08135-3
Xiaofang Gong, Bao Chen, Ling Yang, Yong Zhang, Sijing Chang, Tao Yang, Yukun Chen, Ying Zhu, Zhiye Wang, Xinhua He, Lingui Xue
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引用次数: 0
Coordinated N metabolism and NO signaling underlie allantoin-citrulline synergy in salt-stressed cucumber. 盐胁迫下黄瓜尿囊素-瓜氨酸协同作用的协调N代谢和NO信号。
IF 4.8 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-03 DOI: 10.1186/s12870-026-08146-0
Masoomeh Amerian, Gholamreza Gohari, Sima Panahirad, Georgia Ntatsi

Salinity stress severely limits cucumber (Cucumis sativus L.) productivity by disrupting growth, photosynthesis, and ion homeostasis. This study investigated the potential of foliar-applied allantoin (1 mM) and citrulline (1 mM) to enhance salinity tolerance in hairy cucumber, a salt-sensitive Iranian landrace. A completely randomized design factorial experiment with three replications tested salinity levels (0, 50, 100 mM NaCl) and foliar treatments (control, allantoin, citrulline, and their combination). The results showed that salinity reduced plant height, dry weight, chlorophyll content (SPAD, Fv/Fm), and relative water content (RWC) while increasing electrolyte leakage (EL), oxidative markers (MDA, H2O₂), and Na⁺ accumulation. Allantoin mitigated these effects by enhancing nitrogen (N) metabolism, improving K⁺/Na+ homeostasis, and upregulating osmolyte (proline, sugars) and antioxidant (phenolics, ascorbic acid) accumulation. Citrulline boosted nitric oxide (NO) production, which reduced Na⁺ toxicity, improved stomatal conductance, and activated enzymatic antioxidants (SOD, APX). Their combined application synergistically improved growth (44.24% in yield), photosynthesis (5.12% in Fv/Fm), and RWC (6.45%) while reducing H2O2 (61.53%) and oxidative stress (43.74% MDA). Notably, salt-stressed plants treated with both compounds exhibited elevated fruit levels of health-promoting metabolites (cucurbitacin, citrulline). Moreover, allantoin enhanced N assimilation and polyamine-mediated membrane stability, while citrulline-derived NO optimized ion transport and ROS scavenging. These findings highlight the dual role of allantoin (N metabolism) and citrulline (NO signaling) in conferring salt tolerance and propose their combined foliar application as a sustainable strategy for improving cucumber resilience in saline agriculture.

盐胁迫通过破坏黄瓜的生长、光合作用和离子稳态,严重限制了黄瓜的产量。本研究研究了叶面施用尿囊素(1mm)和瓜氨酸(1mm)对提高毛黄瓜耐盐性的潜力。毛黄瓜是一种盐敏感的伊朗地方品种。一个完全随机设计的因子试验,3个重复,测试了盐度水平(0、50、100 mM NaCl)和叶面处理(对照、尿囊素、瓜氨酸及其组合)。结果表明,盐度降低了植株高度、干重、叶绿素含量(SPAD、Fv/Fm)和相对含水量(RWC),增加了电解质泄漏(EL)、氧化标志物(MDA、H2O 2)和Na⁺的积累。尿囊素通过增强氮(N)代谢、改善K + /Na+稳态和上调渗透物(脯氨酸、糖)和抗氧化剂(酚类物质、抗坏血酸)积累来减轻这些影响。瓜氨酸促进了一氧化氮(NO)的产生,从而降低了Na⁺的毒性,改善了气孔导度,并激活了酶抗氧化剂(SOD, APX)。它们的联合施用协同提高了生长(产量44.24%)、光合作用(Fv/Fm 5.12%)和RWC(6.45%),同时降低H2O2(61.53%)和氧化应激(MDA 43.74%)。值得注意的是,用这两种化合物处理的盐胁迫植物显示出促进健康的代谢物(葫芦素、瓜氨酸)水平升高。此外,尿囊素增强了N同化和多胺介导的膜稳定性,而瓜氨酸衍生的NO优化了离子运输和ROS清除。这些发现强调了尿囊素(N代谢)和瓜氨酸(NO信号)在赋予黄瓜耐盐性中的双重作用,并提出了它们的叶面组合施用作为提高盐碱化农业黄瓜抗逆性的可持续策略。
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引用次数: 0
Genome-wide-association-analysis-based identification of genetic loci and candidate genes associated with seedling emergence rate in super-sweet corn (Zea mays L.). 基于全基因组关联分析的超甜玉米出苗率相关基因位点和候选基因鉴定
IF 4.8 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-03 DOI: 10.1186/s12870-026-08228-z
Nini Cui, Yishuang Wang, Yulin Yu, Ahmad Rizwan, Haibing Yu, Yongfu Wang, Xinxin Cheng
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引用次数: 0
Preliminary exploration of developmental characteristics of almond flesh based on transcriptome and metabolome combined analysis. 基于转录组和代谢组联合分析的杏仁果肉发育特征初步探讨。
IF 4.8 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-03 DOI: 10.1186/s12870-025-07893-w
Dongdong Zhang, Zhenfan Yu, Xiangxi Zeng, Yawen He, Xingyue Liu, Bin Zeng
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引用次数: 0
Priority impacts of plant growth promoting fungi and proline under NaCl stress: boosting chickpea plants tolerance and performance. 促进植物生长的真菌和脯氨酸在NaCl胁迫下的优先影响:提高鹰嘴豆植株的耐受性和生产性能。
IF 4.8 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-03 DOI: 10.1186/s12870-026-08096-7
Rabab A Metwally, Maha A Azb, Marwa M El-Demerdash, Reda E Abdelhameed

Soil salinity threatens global agriculture by impairing plant growth, crop productivity, and soil health. This study was conducted to assess the impact of salinity on chickpea performance at the vegetative stage and the possible ameliorating role of arbuscular mycorrhizal fungi (AMF) and proline applications. A greenhouse experiment with 30 pots (5 replicates × 6 treatments) subjected half the treatments to 200 mM NaCl, AMF was applied at sowing, and proline was sprayed two weeks post-planting. Total pigments dramatically decreased [49.18%] in salt-stressed chickpea. Biomass, protein and carbohydrate metabolism were also affected. For instance, plant height and total fresh weight (TFW) showed inhibitions of 37.83% and 72.19% as compared to control. Conversely, chickpea under salt stress had an increased accumulation of H2O2 (13.12 mg/g DW) and higher electrolyte leakage (54.72%), however, proline or AMF supplementation decreased their levels. Also, the total protein content and antioxidant enzymes were higher in salt-stressed treatments. Under stress, the total carbohydrate contents in chickpea leaves were significantly enhanced by AMF inoculation (23.44%) and proline application (19.43%), when compared to the control. Moreover, salinity led to distortion of chickpea leaf anatomy including a decrease in upper and lower epidermis thickness, vessel numbers, as well as degradation of palisade and spongy parenchyma. Salinity also disrupted ion balance, increasing Na+ and decreasing K+ (lower K+/Na+ ratio), which elevated H2O2 levels and membrane leakage. These results revealed that AMF as a symbiotic microorganism and proline as a well-known osmoprotectant perform several tasks to alleviate NaCl stress by decreasing Na+ uptake, H2O2 content and membrane leakage. Subsequently, an enhancement in growth criteria, pigment fraction and carbohydrates was achieved with their applications under NaCl stress. Most obviously their applications maintained the chickpea leaf anatomy. As an innovative approach, we propose that AMF inoculation or proline application can reverse salinity-induced damage, offering a pathway to enhance crop tolerance in salt-affected regions.

土壤盐碱化通过损害植物生长、作物生产力和土壤健康,威胁着全球农业。本试验旨在探讨盐度对营养期鹰嘴豆生产性能的影响,以及应用丛枝菌根真菌(AMF)和脯氨酸可能对鹰嘴豆生产性能的改善作用。温室试验30盆(5个重复× 6个处理),各处理一半处理200 mM NaCl,播种时施用AMF,播后2周喷施脯氨酸。盐胁迫下鹰嘴豆总色素显著减少[49.18%]。生物量、蛋白质和碳水化合物代谢也受到影响。其中株高和总鲜重的抑制率分别为37.83%和72.19%。相反,盐胁迫下鹰嘴豆的H2O2积累增加(13.12 mg/g DW),电解质泄漏增加(54.72%),而脯氨酸和AMF的添加降低了这些水平。总蛋白含量和抗氧化酶含量在盐胁迫处理下均较高。在胁迫条件下,接种AMF(23.44%)和施用脯氨酸(19.43%)显著提高了鹰嘴豆叶片总碳水化合物含量。此外,盐度导致鹰嘴豆叶片解剖结构扭曲,包括上下表皮厚度减少,血管数量减少,栅栏和海绵薄壁组织退化。盐度还会破坏离子平衡,使Na+升高,K+降低(K+/Na+比值降低),从而导致H2O2水平升高和膜渗漏。这些结果表明,AMF作为一种共生微生物,脯氨酸作为一种众所周知的渗透保护剂,通过降低Na+吸收、H2O2含量和膜渗漏来减轻NaCl胁迫。随后,在NaCl胁迫下,其生长指标、色素含量和碳水化合物含量均得到提高。最明显的是,它们的应用保持了鹰嘴豆叶的解剖结构。作为一种创新的方法,我们提出接种AMF或施用脯氨酸可以逆转盐害,为提高盐害地区作物的耐受性提供了一条途径。
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引用次数: 0
GWAS reveals genetic interplay between root architecture and nitrogen uptake in Aegilops tauschii. GWAS研究揭示了黄芪根构型与氮素吸收之间的遗传相互作用。
IF 4.8 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-03 DOI: 10.1186/s12870-026-08148-y
Nitika Sandhu, Sagarika Chaudhuri, Mehak Sethi, Inderjit Yadav, Aman Kumar, Muskan Gupta, Gaurav Augustine, Achla Sharma, Satinder Kaur, Sanu Arora, Brande B H Wulff, Parveen Chhuneja
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引用次数: 0
Comprehensive analysis of IDD family genes and their expression patterns in barley. 大麦IDD家族基因及其表达模式的综合分析。
IF 4.8 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-03 DOI: 10.1186/s12870-026-08289-0
Chengxin Yin, Junjuan Li, Wenxing Liu, Jianbin Zeng, Wujun Ma, Xue Feng
{"title":"Comprehensive analysis of IDD family genes and their expression patterns in barley.","authors":"Chengxin Yin, Junjuan Li, Wenxing Liu, Jianbin Zeng, Wujun Ma, Xue Feng","doi":"10.1186/s12870-026-08289-0","DOIUrl":"https://doi.org/10.1186/s12870-026-08289-0","url":null,"abstract":"","PeriodicalId":9198,"journal":{"name":"BMC Plant Biology","volume":" ","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146104078","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
Genome-wide association study identifies key loci and candidate genes for maize grain yield-related traits. 全基因组关联研究确定玉米籽粒产量相关性状的关键位点和候选基因。
IF 4.8 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-03 DOI: 10.1186/s12870-026-08285-4
Ming Chen, Jiakun Wen, Jiajia Li, Yuanqiang Hu, Junyan Liu, Jiarui Chen, Zhaofeng Liu, Mengshi Wang, Zixuan Zheng, Qiurong Liu, Xiaodi Zheng, Yucong Li, Wei qianCai, Weiwei Chen, Xuhui Li, Lina Fan, Ruiqiang Lai, Yongwen Qi
{"title":"Genome-wide association study identifies key loci and candidate genes for maize grain yield-related traits.","authors":"Ming Chen, Jiakun Wen, Jiajia Li, Yuanqiang Hu, Junyan Liu, Jiarui Chen, Zhaofeng Liu, Mengshi Wang, Zixuan Zheng, Qiurong Liu, Xiaodi Zheng, Yucong Li, Wei qianCai, Weiwei Chen, Xuhui Li, Lina Fan, Ruiqiang Lai, Yongwen Qi","doi":"10.1186/s12870-026-08285-4","DOIUrl":"https://doi.org/10.1186/s12870-026-08285-4","url":null,"abstract":"","PeriodicalId":9198,"journal":{"name":"BMC Plant Biology","volume":" ","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146112284","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
Integrative transcriptomics and defense-related gene family analysis reveals key genes for maize resistance to fall armyworm. 整合转录组学和防御相关基因家族分析揭示了玉米抗秋粘虫的关键基因。
IF 4.8 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-03 DOI: 10.1186/s12870-026-08266-7
Ying Hu, Tonghan Wang, Junli Du, Haibing Yu, Degong Wu
{"title":"Integrative transcriptomics and defense-related gene family analysis reveals key genes for maize resistance to fall armyworm.","authors":"Ying Hu, Tonghan Wang, Junli Du, Haibing Yu, Degong Wu","doi":"10.1186/s12870-026-08266-7","DOIUrl":"https://doi.org/10.1186/s12870-026-08266-7","url":null,"abstract":"","PeriodicalId":9198,"journal":{"name":"BMC Plant Biology","volume":" ","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146112319","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
期刊
BMC Plant Biology
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