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Sulfur assimilation and regulation of abiotic stress via OMICS 硫同化和通过 OMICS 调节非生物胁迫
IF 6.8 Q1 PLANT SCIENCES Pub Date : 2024-10-05 DOI: 10.1016/j.stress.2024.100630
Bilal Ahmad Mir , Ritu Kumari , Gurmeen Rakhra , Parul Parihar , Rachana Singh , Aman Deep Raju , Prabhat Kumar Srivastava , Sheo Mohan Prasad , Richa Singh , Shefali Gulliya
Abiotic stress, which includes salinity, drought, heat, and cold, as well as their many combinations, severely reduces crop productivity across the globe each year. Considering the intensified worldwide climatic changes, the effects of these conditions on plant productivity become increasingly more concerning. Sulfur is essential for several metabolic processes, including the organization and control of electron transport. Reductive assimilation and integration into cysteine and methionine, sulfate absorption, and reductive assimilation and integration are the key methods that oxidized and reduced forms of organically bound sulfur get to their different roles. Protective compounds with sulfur, such as glutathione, phytochelatins, S-rich proteins, and several secondary metabolites, are essential for plants to survive abiotic stress, such as dihydroasparagusic acid, hydrogen sulfide, etc. This thorough review covered the regulation of sulfur at the protein and gene transcription levels in response to abiotic stress.
非生物胁迫,包括盐度、干旱、高温和低温,以及它们的多种组合,每年都会严重降低全球作物的产量。考虑到全球气候变化加剧,这些条件对植物生产力的影响越来越令人担忧。硫对于多个代谢过程至关重要,包括电子传输的组织和控制。半胱氨酸和蛋氨酸的还原同化和整合、硫酸盐吸收以及还原同化和整合是氧化型和还原型有机结合硫发挥不同作用的主要方法。含硫的保护性化合物,如谷胱甘肽、植物螯合素、富含 S 的蛋白质和一些次生代谢产物,是植物在二氢天冬酰胺酸、硫化氢等非生物胁迫下生存所必需的。这篇综述深入探讨了硫在蛋白质和基因转录水平上对非生物胁迫的调控。
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引用次数: 0
Exploring the rice root metabolome to unveil key biomarkers under the stress of Meloidogyne graminicola 探索水稻根部代谢组,揭示禾谷粉虱胁迫下的关键生物标志物
IF 6.8 Q1 PLANT SCIENCES Pub Date : 2024-09-30 DOI: 10.1016/j.stress.2024.100620
Vedant Gautam , Ravi Nagar , Pradeep Barai , Vibhootee Garg , Shreyashi Singh , Himanshu Singh , Shubham Patel , Mukesh , Ashish Kumar , R.K. Singh
Rice (Oryza sativa) is a highly significant cereal crop on a global scale. Crop plants usually respond to the biotic challenges with altered metabolic composition and physiological perturbations. We have deciphered altered metabolite composition, modulated metabolic pathways and identified metabolite biomarkers in M. graminicola-challenged susceptible rice variety HUR-917 using NMR (Nuclear magnetic resonance) mass spectrophotometry-based metabolomics. In this study, we conducted a comprehensive analysis of the metabolome of susceptible rice plants challenged with the pathogen M. graminicola to unravel complex metabolic changes, identify key biosynthetic pathways, and pinpoint metabolite biomarkers. Through statistical analysis, we identified 100 significant metabolites, with 48 upregulated and 52 downregulated metabolites at a fold change threshold of ≥ 2.0. Multivariate analyses, including Partial Least Squares Discriminant Analysis (PLS-DA) and Orthogonal Partial Least Squares Discriminant Analysis (OPLS-DA), revealed clear discrimination between control and treated samples, with high predictive ability for annotated discriminant metabolites. Pathway enrichment analysis unveiled prominent involvement of metabolic pathways such as nicotine and nicotinamide metabolism and valine, leucine, and isoleucine degradation. Furthermore, putatively annotated biomarkers identified through multivariate ROC curve analysis included metabolites like Thymol, Glycylproline, N-acetylglutamate, and Betaine, among others. These biomarkers, along with pathway enrichment results, underscored the intricate defense mechanisms employed by rice plants in response to M. graminicola infection. Notably, upregulated metabolites such as betaines, histamine, and 5-hydroxytryptophan were implicated in plant defense responses, while downregulated metabolites like thymol and N-acetylglutamate may contribute to increased susceptibility to nematode infection. Nicotinic acid downregulation is crucial in enhanced susceptibility of rice against M. graminicola. Pathway mapping highlighted the enrichment of crucial metabolic pathways involved in primary and secondary metabolism, emphasizing the shift from growth-related processes to defense-related responses like nicotine and nicotinamide metabolism under stress conditions. Overall, our findings provide valuable insights into the metabolic dynamics of rice plants during pathogen invasion, identifying potential biomarkers and elucidating key metabolic pathways involved in plant defense mechanisms. This research contributes to a deeper understanding of plant-nematode interactions and holds implications for the development of effective strategies for root knot management in rice cultivation.
水稻(Oryza sativa)是全球范围内非常重要的谷类作物。作物植物通常通过改变代谢组成和生理扰动来应对生物挑战。我们利用基于 NMR(核磁共振)质谱光度法的代谢组学研究,破译了受禾谷镰刀菌侵染的易感水稻品种 HUR-917 的代谢物组成变化、代谢途径调节和代谢物生物标记物。在这项研究中,我们对受到病原体禾谷粉虱挑战的易感水稻植株的代谢组进行了全面分析,以揭示复杂的代谢变化,确定关键的生物合成途径,并找出代谢物生物标志物。通过统计分析,我们确定了 100 个重要的代谢物,其中 48 个上调代谢物和 52 个下调代谢物的折合变化阈值≥ 2.0。包括偏最小二乘法判别分析(PLS-DA)和正交偏最小二乘法判别分析(OPLS-DA)在内的多变量分析表明,对照样本和治疗样本之间有明显的区别,注释的判别代谢物具有很高的预测能力。途径富集分析揭示了烟碱和烟酰胺代谢以及缬氨酸、亮氨酸和异亮氨酸降解等代谢途径的显著参与。此外,通过多元 ROC 曲线分析确定的推测注释生物标志物包括百里酚、甘氨酰脯氨酸、N-乙酰谷氨酸和甜菜碱等代谢物。这些生物标志物以及通路富集的结果都强调了水稻植物在应对禾谷粉菌感染时所采用的错综复杂的防御机制。值得注意的是,上调的代谢物(如甜菜碱、组胺和 5-羟色氨酸)与植物的防御反应有关,而下调的代谢物(如百里酚和 N-乙酰谷氨酸)则可能导致对线虫感染的易感性增加。烟酸下调是水稻对禾谷线虫易感性增强的关键。通路图突出显示了参与初级和次级代谢的关键代谢通路的富集,强调了在胁迫条件下从与生长相关的过程转向与防御相关的反应,如烟碱和烟酰胺代谢。总之,我们的研究结果为了解病原体入侵期间水稻植物的代谢动态、确定潜在的生物标记物和阐明植物防御机制中的关键代谢途径提供了宝贵的见解。这项研究有助于加深对植物与线虫相互作用的理解,并对制定水稻种植中根结管理的有效策略具有重要意义。
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引用次数: 0
Plant growth promoting signatory volatiles emitted by a drought-tolerant bacterium Bacillus altitudinis FD48 and its role in moisture stress alleviation in rice (Oryza sativa L.) 耐旱芽孢杆菌 FD48 释放的植物生长促进标志性挥发物及其在缓解水稻(Oryza sativa L.)水分胁迫中的作用
IF 6.8 Q1 PLANT SCIENCES Pub Date : 2024-09-30 DOI: 10.1016/j.stress.2024.100621
Shobana Narayanasamy, Sivakumar Uthandi
Increasing evidence implies that bacterial volatile organic compounds (bVOCs) play a significant role in plant-microbe interaction. Plant associated bacteria produces plant growth modulating volatiles elicits induced systemic tolerance (IST) in plants against a multitude of abiotic stress. Induction of IST and plant growth promotion by signatory bVOCs of Bacillus altitudinis FD48 against drought are reported in this study. The rice seedlings exposed to bVOCs blends of FD48 showed a one-fold increase in whole plant biomass and auxin content (3 µmol g-1 FW) under induced moisture stress. The effect of bVOCs highly depends on the inoculum load. Higher inoculum quantity (100 µL) is detrimental to plant growth. bVOCs produced by FD48 profiled at different growth intervals in GC–MS-ATD revealed a total of 40 bioactive compounds both under stress (PEG 6000) and non-stressed conditions. Interestingly, potential plant growth-promoting compounds such as 1-Hexanol, 2,3-butanediol, dimethyl disulfide, benzene, butanoic acid, pentadecane, and acetic acid are more pronounced. Few compounds produced under non-stress were found to increase during stress (example, 2,3-Butanediol, and acetic acid). This study unraveled the significant biosynthetic pathways induced by FD48 bVOC blends, such as pyruvate metabolism, tryptophan metabolism, sulfur metabolism, fatty acid biosynthesis, and ethanol degradation that anchors in abating moisture stress. Hence, it can be concluded that PGPB B. altitudinis FD48 produced bVOCs could be potential orchestrators of induced systemic tolerance in plants against moisture stress.
越来越多的证据表明,细菌挥发性有机化合物(bVOCs)在植物与微生物的相互作用中发挥着重要作用。与植物相关的细菌会产生调节植物生长的挥发性物质,诱导植物对多种非生物胁迫产生系统耐受性(IST)。本研究报告了高度芽孢杆菌(Bacillus altitudinis)FD48 的标志性 bVOCs 对干旱的诱导系统耐受性和植物生长的促进作用。在诱导水分胁迫下,暴露于 FD48 bVOCs 混合物的水稻幼苗的全株生物量和辅酶含量(3 µmol g-1 FW)均增加了 1 倍。bVOCs 的效果在很大程度上取决于接种量。通过 GC-MS-ATD 分析 FD48 在不同生长期产生的 bVOCs,发现在胁迫(PEG 6000)和非胁迫条件下共有 40 种生物活性化合物。有趣的是,潜在的促进植物生长的化合物,如 1-己醇、2,3-丁二醇、二甲基二硫、苯、丁酸、十五烷和乙酸等更为明显。发现在非胁迫条件下产生的少数化合物在胁迫条件下会增加(例如,2,3-丁二醇和乙酸)。这项研究揭示了 FD48 bVOC 混合物诱导的重要生物合成途径,如丙酮酸代谢、色氨酸代谢、硫代谢、脂肪酸生物合成和乙醇降解,这些途径在缓解水分胁迫方面发挥着重要作用。因此,可以得出结论,PGPB B. altitudinis FD48 产生的 bVOCs 可能是诱导植物系统耐受水分胁迫的潜在协调者。
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引用次数: 0
Specific phytohormones levels in leaves and spikes of wheat explains the effects of elevated CO2 on drought stress at the flowering stage 小麦叶片和穗中的特定植物激素水平解释了高浓度二氧化碳对开花期干旱胁迫的影响
IF 6.8 Q1 PLANT SCIENCES Pub Date : 2024-09-30 DOI: 10.1016/j.stress.2024.100622
Sajid Shokat , Dominik K. Großkinsky , Fulai Liu
This study aims to understand the combined impact of elevated CO2 and drought stress at flowering stage to explain the adaptation of bread wheat to future climate change scenarios. Four wheat genotypes with 24 replications of each were grown in two different greenhouses, maintaining 400 (ambient) and 800 (elevated) ppm levels of CO2. Irrigation was withheld at flowering to impose drought to 10 replications while 10 were allowed to grow normally. Daily water consumption was recorded until the pot-water of drought plants reached 10 % of the well-watered ones. This study was aided by the measurement of ecophysiology, phytohormones, and yield-related traits. In comparison to normal CO2, plants consumed the pot water quickly under elevated CO2. Further, the threshold value of the fraction of transpirable soil water, at which the relative transpiration is diverging from 1 was different at the two levels of CO2, and among genotypes. Drought significantly reduced plant water relations, gas exchange parameters, grain yield, and yield-related traits but enhanced osmotic adjustment, kernel abortion, and most of the phytohormones in leaves and spikes. Elevated CO2 though increased gas exchange parameters significantly under well-watered conditions but these parameters were significantly reduced under combined effect with drought and resultantly, lower yield-related traits were recorded. Moreover, we also identified a strong positive association between leaf trans-zeatin and a strong negative association of leaf and spike ABA and ACC with grain yield indicating that maintenance of a higher level of leaf trans-zeatin or lower levels of ABA and ACC can help plants to adapt better to the combination of elevated CO2 and drought.
本研究旨在了解高浓度二氧化碳和开花期干旱胁迫的综合影响,以解释面包小麦对未来气候变化情景的适应性。四种小麦基因型在两个不同的温室中生长,每个基因型有 24 个重复,分别保持 400 ppm(环境)和 800 ppm(升高)的二氧化碳水平。10个重复在开花时停止灌溉以施加干旱,10个重复正常生长。记录每天的耗水量,直到干旱植物的盆水达到浇水充足植物的 10%。生态生理学、植物激素和产量相关性状的测量为本研究提供了帮助。与正常 CO2 相比,植物在高浓度 CO2 条件下消耗盆水的速度更快。此外,在两种二氧化碳水平下,相对蒸腾量偏离 1 时的可蒸腾土壤水分阈值不同,不同基因型的阈值也不同。干旱明显降低了植物的水分关系、气体交换参数、谷物产量和产量相关性状,但增强了渗透调节、籽粒流产以及叶片和穗中的大部分植物激素。在水分充足的条件下,二氧化碳升高会显著增加气体交换参数,但在与干旱共同作用的条件下,这些参数会显著降低,从而导致产量相关性状降低。此外,我们还发现叶片反玉米素与谷物产量呈强正相关,而叶片和穗粒 ABA 和 ACC 与谷物产量呈强负相关,这表明保持较高水平的叶片反玉米素或较低水平的 ABA 和 ACC 能帮助植物更好地适应二氧化碳升高和干旱的共同作用。
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引用次数: 0
Inositol hexakisphosphate (IP6) enhances the electrical excitability of Characean Nitellopsis obtusa 肌醇六磷酸酯(IP6)能增强藻类 Nitellopsis obtusa 的电兴奋性
IF 6.8 Q1 PLANT SCIENCES Pub Date : 2024-09-28 DOI: 10.1016/j.stress.2024.100618
Vilmantas Pupkis, Judita Janužaitė, Indrė Lapeikaitė, Vilma Kisnierienė
Despite the importance of action potentials (APs) in plant stress physiology, the molecular identity of Ca2+ channels that initiate APs by passing Ca2+ into the cytoplasm is still unknown in Characean macroalgae. While the Thiel-Beilby mathematical model of AP generation proposes that Ca2+ channels are activated by inositol 1,4,5-trisphosphate (IP3), this hypothesis is controversial because plants do not possess animal IP3 receptor gene homologues. In the present study, we employed the two-electrode current/voltage clamp technique to determine whether IP3 and another inositol phosphate IP6 could modulate the electrogenic parameters of an aquatic macrophyte Nitellopsis obtusa internodal cells. IP3 had no significant effect, whereas IP6 reversibly hyperpolarised the AP excitation threshold which is consistent with the activation of Ca2+ channels. IP6 also shifted the reversal potentials of the Ca2+ and Cl currents during excitation to negative membrane potential values, indicating altered calcium dynamics in the cytoplasm. These findings suggest the regulation of Ca2+ channels during electrical excitation by IP6 rather than IP3. IP6-induced shift of Ca2+ channel voltage dependence allows a lower magnitude external stressor to initiate electrical signalling, thus turning on various downstream physiological responses.
尽管动作电位(APs)在植物应激生理学中非常重要,但在大型藻类中,通过将 Ca2+ 传递到细胞质来启动 APs 的 Ca2+ 通道的分子特性仍然未知。虽然 Thiel-Beilby 的 AP 生成数学模型提出 Ca2+ 通道是由 1,4,5-三磷酸肌醇(IP3)激活的,但由于植物不具有动物 IP3 受体基因同源物,因此这一假说存在争议。在本研究中,我们采用双电极电流/电压钳技术来确定 IP3 和另一种肌醇磷酸盐 IP6 是否能调节水生大型藻类 Nitellopsis obtusa 节间细胞的电能参数。IP3 没有明显影响,而 IP6 可逆地使 AP 激发阈值超极化,这与 Ca2+ 通道的激活相一致。IP6 还使兴奋过程中 Ca2+ 和 Cl- 电流的反向电位转为负膜电位值,这表明细胞质中的钙动力学发生了改变。这些发现表明,在电兴奋过程中,Ca2+通道受 IP6 而不是 IP3 的调节。IP6 诱导的 Ca2+ 通道电压依赖性的转变允许较低强度的外部应激源启动电信号,从而开启各种下游生理反应。
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引用次数: 0
Efficacy of chitosan loaded zinc oxide nanoparticles in alleviating the drastic effects of drought from corn crop 壳聚糖负载氧化锌纳米颗粒在缓解玉米作物干旱剧烈影响方面的功效
IF 6.8 Q1 PLANT SCIENCES Pub Date : 2024-09-26 DOI: 10.1016/j.stress.2024.100617
Aina Inam , Sumera Javad , Iqra Naseer , Pravej Alam , Zainab M. Almutairi , Mohammad Faizan , Shafia Zauq , Anis Ali Shah
Water stress significantly impedes the normal growth and development of crops. Water scarcity profoundly affects crop growth and productivity, notably impacting vital crops like maize (Zea mays L.). The field of nanotechnology has surfaced as a promising avenue for mitigating the negative consequences of water stress on crucial crops. The objective of this study was to alleviate the negative impacts of drought stress on maize (Z. mays) via the utilization of chitosan-loaded nanoparticles (CSNPs). The CSNPs were synthesized using extracts from Nigella sativa L. and were characterized by employing scanning electron microscopy (SEM), X-ray diffraction (XRD), UV–Vis spectroscopy, and Fourier-transform infrared spectroscopy (FTIR). The optimized CSNPs doses from the screening experiment (ranges between 300 µg/L to 500 mg/L) were applied as a foliar spray to maize plants in a pot experiment, in both typical and drought scenarios. A completely randomized factorial design (CRD) was employed for the experiment. Characterization by SEM analysis showed the existence of CSNPs, displaying an average particle size of 89 nm. Whereas XRD analysis showed a crystalline structure. FTIR analysis unveiled the existence of diverse functional groups that functioned as reducing agents on the surface of synthesized CSNPs. Furthermore, CSNPs significantly mitigated the negative effects of water stress by positively influencing various growth parameters of maize crops. It was noted that there was an increase in plant length by 10.20 %, leaf area by 29.87 %, number of tillers per plant by 5.92 %, ear length by 8.66 %, cob weight by 47.22 %, and number of grains by 462.42 % in comparison to the control. Moreover, the utilization of CSNPs had a profound impact on phytochemical parameters, including osmotic potential increases by 5.61 %, relative water content decreases by 2.24 %, chlorophyll and carotenoid content decreases by 18.14 % and 17.28 % respectively, membrane stability index increases by 9.82 %, sugar content decreases by 6.085, proteins increases by 61.67 %, phenolics increases by 0.42 %, proline decreases by 5.51 %, flavonoids increases by 21.12 %, and malondialdehyde (MDA) content decreases by 21.07 % in drought stress as compared to control. The levels of MDA, a marker of oxidative stress, in maize, decreased significantly in drought conditions by 21.07 % in response to the application of CSNPs. Stress studies revealed that CSNPs increased the functioning of antioxidant enzymes under drought stress, such as catalase (CAT) by 13.71 %, peroxidase (POD) by 27.17 %, and superoxide dismutase (SOD) by 24.66 %, as compared to control suggesting their role as stress mitigators. In conclusion, the study establishes that chitosan-loaded nanoparticles (CSNPs) positively enhance drought tolerance in maize, making them a potential tool for sustainable agriculture under water-limited conditions.
水胁迫严重阻碍了作物的正常生长和发育。缺水严重影响农作物的生长和产量,尤其是对玉米(Zea mays L.)等重要农作物的影响。纳米技术领域已成为减轻水分胁迫对重要农作物的负面影响的一条大有可为的途径。本研究的目的是通过利用壳聚糖负载纳米粒子(CSNPs)来减轻干旱胁迫对玉米(Z. mays)的负面影响。CSNPs 采用 Nigella sativa L. 的提取物合成,并通过扫描电子显微镜(SEM)、X 射线衍射(XRD)、紫外可见光谱和傅立叶变换红外光谱(FTIR)进行表征。在盆栽实验中,将筛选实验中优化的 CSNPs 剂量(介于 300 微克/升至 500 毫克/升之间)作为叶面喷洒剂施用到玉米植株上,包括典型情况和干旱情况。实验采用了完全随机因子设计(CRD)。扫描电镜分析表明存在 CSNPs,其平均粒径为 89 nm。XRD 分析则显示出结晶结构。傅立叶变换红外光谱分析揭示了合成的 CSNPs 表面存在作为还原剂的各种官能团。此外,CSNPs 还对玉米作物的各种生长参数产生了积极影响,从而大大减轻了水分胁迫的负面影响。与对照组相比,植株长度增加了 10.20%,叶面积增加了 29.87%,每株分蘖数增加了 5.92%,穗长增加了 8.66%,穗粒重增加了 47.22%,穗粒数增加了 462.42%。此外,使用 CSNPs 对植物化学参数也有深远影响,包括渗透势增加 5.61 %,相对含水量减少 2.24 %,叶绿素和类胡萝卜素含量分别减少 18.14 % 和 17.28 %,膜稳定性指数增加 9.与对照组相比,干旱胁迫下的糖含量减少了 6.085 %,蛋白质增加了 61.67 %,酚类增加了 0.42 %,脯氨酸减少了 5.51 %,类黄酮增加了 21.12 %,丙二醛(MDA)含量减少了 21.07 %。在施用 CSNPs 后,玉米中作为氧化应激标志的 MDA 含量在干旱条件下显著降低了 21.07%。胁迫研究表明,与对照相比,CSNPs 提高了干旱胁迫下抗氧化酶的功能,如过氧化氢酶(CAT)提高了 13.71%,过氧化物酶(POD)提高了 27.17%,超氧化物歧化酶(SOD)提高了 24.66%,这表明它们具有缓解胁迫的作用。总之,该研究证实壳聚糖负载纳米粒子(CSNPs)能积极提高玉米的耐旱性,使其成为水资源有限条件下可持续农业的潜在工具。
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引用次数: 0
A comparative analysis of heavy metal stress responses in different grain amaranth cultivars 不同谷粒苋栽培品种对重金属胁迫反应的比较分析
IF 6.8 Q1 PLANT SCIENCES Pub Date : 2024-09-26 DOI: 10.1016/j.stress.2024.100619
Júlia Hunková , Monika Lisinovičová , Veronika Lancíková, Monika Szabóová, Jana Kačírová, Veronika Mistríková, Andrea Hricová
Phytoextraction belongs to the most promising and effective strategies for phytoremediation of soils contaminated with heavy metals (HMs). The aim of this study was to determine the phytoextraction potential of two Slovak grain amaranth cultivars Pribina (Amaranthus cruentus) and Zobor (Amaranthus hypochondriacus × Amaranthus hybridus) compared to a commercial cultivar Plainsman (A. hypochondriacus × A. hybridus). Hydroponic experiment was set up for 14 days of treatment with 200 mg l-1 Pb(NO3)2, 150 mg l-1 ZnCl2, and 300 mg l-1 MnCl2. The results showed that all cultivars reacted differently to HMs exposure. Based on the morphological analyses, cv. Pribina and cv. Zobor showed a higher level of HM tolerance, especially to manganese. Location of zinc ions was performed by histochemical staining in roots tissues of treated plants. Biochemical analyses showed that lipid peroxidation was more pronounced in cv. Zobor and Plainsman, while guaiacol peroxidase activity was increased in cv. Pribina. Photosynthetic pigments remained mostly unaffected by HM treatment. Significant changes in gene expression were detected in all cultivars, especially for stress-related genes AhDGR2 and Ah24. Translocation of HMs from roots to shoots was not efficient enough to consider grain amaranth as a hyperaccumulator, but a strong phytostabilization potential is presumed for each examined cultivar.
植物萃取是对受重金属(HMs)污染的土壤进行植物修复的最有前途和最有效的策略。本研究旨在确定斯洛伐克两种谷粒苋栽培品种 Pribina(Amaranthus cruentus)和 Zobor(Amaranthus hypochondriacus × Amaranthus hybridus)与商业栽培品种 Plainsman(A. hypochondriacus × A. hybridus)的植物萃取潜力。水培实验用 200 mg l-1 Pb(NO3)2、150 mg l-1 ZnCl2 和 300 mg l-1 MnCl2 处理 14 天。结果表明,所有栽培品种对接触 HMs 的反应不同。根据形态分析,cv.Pribina 和 cv.Zobor 对 HM 的耐受性更高,尤其是对锰的耐受性。通过组织化学染色法确定了锌离子在处理过的植物根部组织中的位置。生化分析表明,Zobor 和 Plainsman 作物的脂质过氧化反应更明显,而 Zobor 作物的脂质过氧化反应更严重。而 Pribina 品种的愈创木酚过氧化物酶活性则有所增加。而 Pribina 品种的愈创木酚过氧化物酶活性有所增加。光合色素大多不受 HM 处理的影响。所有栽培品种的基因表达都发生了显著变化,尤其是与胁迫相关的基因 AhDGR2 和 Ah24。HMs 从根部向嫩芽的转移效率不高,不足以将谷粒苋视为超积累植物,但可以推测每个受检栽培品种都具有很强的植物稳定潜力。
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引用次数: 0
Exploring edamame survival mechanisms under combined drought and heat stress: Photosynthesis efficiency and carbohydrate accumulation 探索毛豆在干旱和高温双重胁迫下的生存机制:光合作用效率和碳水化合物积累
IF 6.8 Q1 PLANT SCIENCES Pub Date : 2024-09-25 DOI: 10.1016/j.stress.2024.100616
Jeremiah M. Hlahla , Mpho S. Mafa , Rouxléne van der Merwe , Makoena J. Moloi
The combined drought and heat (DH) stress have devastating effects on plant physiological and biochemical processes, leading to poor yield. The aims of this study were to identify the physio-biochemical mechanisms employed by edamame (Glycine max L. Merrill) for survival and to establish better performing cultivars under DH stress. The impact of DH stress on the photosynthesis efficiency and osmolytes production in three edamame cultivars (UVE14, UVE17 and AGS429) was investigated. Non-destructive measurements were performed to determine the photosynthesis attributes, while pigments, non-structural carbohydrates (starch, glucose, sucrose, trehalose) and proline were extracted and quantified spectrophotometrically. The results showed that chlorophyll a (Chl-a), Chl-b, total chlorophyll and carotenoids in AGS429 were not affected under DH stress, which corresponded to increased normalised difference vegetative index (NDVI). Positive correlations between the carotenoids and total chlorophyll contents suggest that in AGS429, prevention of chlorophyll degradation under DH stress could be attributed to the increased carotenoids because they have antioxidative function. Additionally, AGS429 and UVE14 had increased trehalose, suggesting high osmotic adjustment under DH stress. An increase in starch production maintained glucose balance in AGS429 and UVE14, demonstrating higher photosynthetic efficiency compared to UVE17. The DH stress reduced photochemical reactions and carbohydrate accumulation in UVE17. This study shows that AGS429 and UVE14 protected the photosystems and photosynthetic pigments during DH stress, which led to higher photosynthetic capacity and accumulation of carbohydrates. Thus, maintaining the photosynthesis efficiency and carbohydrate metabolism processes in the AGS429 and UVE14 were adaptation features under DH stress.
干旱和高温(DH)联合胁迫对植物的生理和生化过程具有破坏性影响,导致产量低下。本研究旨在确定毛豆(Glycine max L. Merrill)在干旱和高温胁迫下生存的生理生化机制,并培育出在干旱和高温胁迫下表现更好的栽培品种。研究了 DH 胁迫对三个毛豆栽培品种(UVE14、UVE17 和 AGS429)光合作用效率和渗透溶解物产量的影响。采用非破坏性测量来确定光合作用属性,同时提取色素、非结构性碳水化合物(淀粉、葡萄糖、蔗糖、三卤糖)和脯氨酸,并用分光光度法进行定量。结果表明,在 DH 胁迫下,AGS429 的叶绿素 a(Chl-a)、Chl-b、总叶绿素和类胡萝卜素不受影响,这与归一化差异植被指数(NDVI)的增加相对应。类胡萝卜素和总叶绿素含量之间的正相关性表明,在 AGS429 中,由于类胡萝卜素具有抗氧化功能,因此在 DH 胁迫下防止叶绿素降解可归因于类胡萝卜素的增加。此外,AGS429 和 UVE14 的三卤糖含量增加,表明在 DH 胁迫下具有高渗透调节能力。淀粉产量的增加维持了 AGS429 和 UVE14 的葡萄糖平衡,表明其光合效率高于 UVE17。DH 胁迫减少了 UVE17 的光化学反应和碳水化合物积累。本研究表明,AGS429 和 UVE14 在 DH 胁迫期间保护了光合系统和光合色素,从而提高了光合能力和碳水化合物的积累。因此,保持 AGS429 和 UVE14 的光合作用效率和碳水化合物代谢过程是 DH 胁迫下的适应特征。
{"title":"Exploring edamame survival mechanisms under combined drought and heat stress: Photosynthesis efficiency and carbohydrate accumulation","authors":"Jeremiah M. Hlahla ,&nbsp;Mpho S. Mafa ,&nbsp;Rouxléne van der Merwe ,&nbsp;Makoena J. Moloi","doi":"10.1016/j.stress.2024.100616","DOIUrl":"10.1016/j.stress.2024.100616","url":null,"abstract":"<div><div>The combined drought and heat (DH) stress have devastating effects on plant physiological and biochemical processes, leading to poor yield. The aims of this study were to identify the physio-biochemical mechanisms employed by edamame (<em>Glycine</em> max L. Merrill) for survival and to establish better performing cultivars under DH stress. The impact of DH stress on the photosynthesis efficiency and osmolytes production in three edamame cultivars (UVE14, UVE17 and AGS429) was investigated. Non-destructive measurements were performed to determine the photosynthesis attributes, while pigments, non-structural carbohydrates (starch, glucose, sucrose, trehalose) and proline were extracted and quantified spectrophotometrically. The results showed that chlorophyll <em>a</em> (Chl-a), Chl-b, total chlorophyll and carotenoids in AGS429 were not affected under DH stress, which corresponded to increased normalised difference vegetative index (NDVI). Positive correlations between the carotenoids and total chlorophyll contents suggest that in AGS429, prevention of chlorophyll degradation under DH stress could be attributed to the increased carotenoids because they have antioxidative function. Additionally, AGS429 and UVE14 had increased trehalose, suggesting high osmotic adjustment under DH stress. An increase in starch production maintained glucose balance in AGS429 and UVE14, demonstrating higher photosynthetic efficiency compared to UVE17. The DH stress reduced photochemical reactions and carbohydrate accumulation in UVE17. This study shows that AGS429 and UVE14 protected the photosystems and photosynthetic pigments during DH stress, which led to higher photosynthetic capacity and accumulation of carbohydrates. Thus, maintaining the photosynthesis efficiency and carbohydrate metabolism processes in the AGS429 and UVE14 were adaptation features under DH stress.</div></div>","PeriodicalId":34736,"journal":{"name":"Plant Stress","volume":"14 ","pages":"Article 100616"},"PeriodicalIF":6.8,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and antifungal efficacy of chitosan nanoparticles against notorious mycotoxigenic phytopathogens 壳聚糖纳米颗粒的合成及其对臭名昭著的霉菌毒素植物病原体的抗真菌功效
IF 6.8 Q1 PLANT SCIENCES Pub Date : 2024-09-25 DOI: 10.1016/j.stress.2024.100614
Nimra Iqbal , Amna Shoaib , Qudsia Fatima , Mohammad Abul Farah , Vaseem Raja
Pathogenic fungi such as Fusarium verticillioides, Alternaria alternata, and Macrophomina phaseolina pose significant threats to agriculture and human health due to their production of carcinogenic mycotoxins. This study explored the antifungal potential of chitosan nanoparticles (ChNPs) against these fungi. ChNPs, synthesized via an ionic gelation method, exhibited a prominent UV–visible absorption peak at 250 nm, confirming successful nanoparticle formation. X-ray diffraction patterns revealed their amorphous structure, while FTIR analysis identified key functional groups, including hydroxyl and amine groups, with an average particle size of 50 nm. Antifungal assays demonstrated that ChNPs inhibited fungal growth in a concentration-dependent manner. Specifically, for F. verticillioides, ChNPs reduced growth by 20–60 % at concentrations ranging from 0.03 to 0.15 %, achieving complete inhibition at 0.21 %. Similarly, A. alternata exhibited a MIC of 0.24 %, and M. phaseolina reached a MIC of 0.26 % for complete growth suppression. Higher concentrations of ChNPs caused pronounced structural alterations in the fungi, including discoloration, fragmentation, and distortion of hyphae and conidia/sclerotia, which were linked to significant metabolic changes within the fungal cells. This study highlights the effectiveness of ChNPs as robust antifungal agents, demonstrating their ability to disrupt fungal morphology and enzyme activities.
疣孢镰刀菌、交替交替孢霉和相叶巨霉菌等致病真菌会产生致癌霉菌毒素,对农业和人类健康构成严重威胁。本研究探讨了壳聚糖纳米颗粒(ChNPs)对这些真菌的抗真菌潜力。通过离子凝胶法合成的 ChNPs 在 250 纳米波长处表现出明显的紫外可见吸收峰,证实了纳米粒子的成功形成。X 射线衍射图样显示了它们的无定形结构,而傅立叶变换红外光谱分析则确定了包括羟基和胺基在内的关键官能团,平均粒径为 50 纳米。抗真菌试验表明,ChNPs 能以浓度依赖性方式抑制真菌生长。具体来说,对于疣霉菌,ChNPs 在 0.03% 到 0.15% 的浓度范围内可减少 20% 到 60% 的生长,在 0.21% 的浓度范围内可达到完全抑制。同样,A. alternata 的 MIC 为 0.24%,M. phaseolina 的 MIC 为 0.26%,可完全抑制生长。更高浓度的 ChNPs 会导致真菌发生明显的结构变化,包括菌丝和分生孢子/硬孢子变色、破碎和变形,这与真菌细胞内的显著新陈代谢变化有关。这项研究强调了 ChNPs 作为强效抗真菌剂的有效性,证明了它们破坏真菌形态和酶活性的能力。
{"title":"Synthesis and antifungal efficacy of chitosan nanoparticles against notorious mycotoxigenic phytopathogens","authors":"Nimra Iqbal ,&nbsp;Amna Shoaib ,&nbsp;Qudsia Fatima ,&nbsp;Mohammad Abul Farah ,&nbsp;Vaseem Raja","doi":"10.1016/j.stress.2024.100614","DOIUrl":"10.1016/j.stress.2024.100614","url":null,"abstract":"<div><div>Pathogenic fungi such as <em>Fusarium verticillioides, Alternaria alternata</em>, and <em>Macrophomina phaseolina</em> pose significant threats to agriculture and human health due to their production of carcinogenic mycotoxins. This study explored the antifungal potential of chitosan nanoparticles (ChNPs) against these fungi. ChNPs, synthesized via an ionic gelation method, exhibited a prominent UV–visible absorption peak at 250 nm, confirming successful nanoparticle formation. X-ray diffraction patterns revealed their amorphous structure, while FTIR analysis identified key functional groups, including hydroxyl and amine groups, with an average particle size of 50 nm. Antifungal assays demonstrated that ChNPs inhibited fungal growth in a concentration-dependent manner. Specifically, for <em>F. verticillioides</em>, ChNPs reduced growth by 20–60 % at concentrations ranging from 0.03 to 0.15 %, achieving complete inhibition at 0.21 %. Similarly, <em>A. alternata</em> exhibited a MIC of 0.24 %, and <em>M. phaseolina</em> reached a MIC of 0.26 % for complete growth suppression. Higher concentrations of ChNPs caused pronounced structural alterations in the fungi, including discoloration, fragmentation, and distortion of hyphae and conidia/sclerotia, which were linked to significant metabolic changes within the fungal cells. This study highlights the effectiveness of ChNPs as robust antifungal agents, demonstrating their ability to disrupt fungal morphology and enzyme activities.</div></div>","PeriodicalId":34736,"journal":{"name":"Plant Stress","volume":"14 ","pages":"Article 100614"},"PeriodicalIF":6.8,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unraveling the nano-biochar mediated regulation of heavy metal stress tolerance for sustaining plant health 揭示纳米生物炭介导的重金属胁迫耐受性调控,维持植物健康
IF 6.8 Q1 PLANT SCIENCES Pub Date : 2024-09-25 DOI: 10.1016/j.stress.2024.100615
Mohammad Faizan , Pravej Alam , Asha Kumari , Gali Suresh , Priyanka Sharma , Fadime Karabulut , Sipan Soysal , Ivica Djalovic , Goran Trivan , Muhammad Faheem Adil , Shafaque Sehar , Vishnu D. Rajput , Shamsul Hayat
Heavy metal (HM) toxicity of agricultural soils poses a major risk to plant health, human life, and global food chain. Crop output and health are negatively impacted when HM levels in agricultural soils reach hazardous points. The nano-biochar (nano-BC) mediated stress tolerance has attracted growing scientific interest because biochar has the potential to be a novel and sustainable solution that may be actively included into the development of sustainable agriculture and food production. At present, biochar is extensively employed as a powerful tool to enhance sustainable agriculture with minimal impact on ecosystems and the environment. Nano-BC offers improved surface area, adsorption and mobility properties in soil compared to traditional fertilizers. Furthermore, nano-BC may prove to be the most practical substitute for traditional waste management techniques because of its affordability, sustainability, and environmental friendliness. In this review, we examine the application of nano-BC in the regulation of HM stress tolerance for improving plant growth and development. We focus on the impact of HMs impact on crop productivity, nano-BC amendments, their application, and production. The article also explores the nano-BC risk and toxicity. Through the perspective of multidisciplinary research, this work highlights the significance of nano-BC as cutting-edge tools in the field of agriculture, igniting a paradigm shift toward sustainable and stress-resilient farming systems.
农业土壤中的重金属 (HM) 毒性对植物健康、人类生命和全球食物链构成重大风险。当农业土壤中的重金属含量达到危险点时,作物的产量和健康就会受到负面影响。纳米生物炭(nano-BC)介导的胁迫耐受性引起了科学界越来越多的兴趣,因为生物炭有可能成为一种新颖的可持续解决方案,积极地融入可持续农业和粮食生产的发展中。目前,生物炭已被广泛用作加强可持续农业的有力工具,对生态系统和环境的影响最小。与传统肥料相比,纳米生物碳具有更好的表面积、吸附性和在土壤中的流动性。此外,纳米生化碳因其经济性、可持续性和环境友好性,可能被证明是传统废物管理技术最实用的替代品。在本综述中,我们探讨了纳米生物碱在调节 HM 胁迫耐受性以改善植物生长和发育方面的应用。我们的重点是 HMs 对作物生产力的影响、纳米生物碱的修正、其应用和生产。文章还探讨了纳米生物碱的风险和毒性。通过多学科研究的视角,这项工作凸显了纳米生物化学作为农业领域尖端工具的重要意义,点燃了向可持续和抗逆性农业系统转变的范式。
{"title":"Unraveling the nano-biochar mediated regulation of heavy metal stress tolerance for sustaining plant health","authors":"Mohammad Faizan ,&nbsp;Pravej Alam ,&nbsp;Asha Kumari ,&nbsp;Gali Suresh ,&nbsp;Priyanka Sharma ,&nbsp;Fadime Karabulut ,&nbsp;Sipan Soysal ,&nbsp;Ivica Djalovic ,&nbsp;Goran Trivan ,&nbsp;Muhammad Faheem Adil ,&nbsp;Shafaque Sehar ,&nbsp;Vishnu D. Rajput ,&nbsp;Shamsul Hayat","doi":"10.1016/j.stress.2024.100615","DOIUrl":"10.1016/j.stress.2024.100615","url":null,"abstract":"<div><div>Heavy metal (HM) toxicity of agricultural soils poses a major risk to plant health, human life, and global food chain. Crop output and health are negatively impacted when HM levels in agricultural soils reach hazardous points. The nano-biochar (nano-BC) mediated stress tolerance has attracted growing scientific interest because biochar has the potential to be a novel and sustainable solution that may be actively included into the development of sustainable agriculture and food production. At present, biochar is extensively employed as a powerful tool to enhance sustainable agriculture with minimal impact on ecosystems and the environment. Nano-BC offers improved surface area, adsorption and mobility properties in soil compared to traditional fertilizers. Furthermore, nano-BC may prove to be the most practical substitute for traditional waste management techniques because of its affordability, sustainability, and environmental friendliness. In this review, we examine the application of nano-BC in the regulation of HM stress tolerance for improving plant growth and development. We focus on the impact of HMs impact on crop productivity, nano-BC amendments, their application, and production. The article also explores the nano-BC risk and toxicity. Through the perspective of multidisciplinary research, this work highlights the significance of nano-BC as cutting-edge tools in the field of agriculture, igniting a paradigm shift toward sustainable and stress-resilient farming systems.</div></div>","PeriodicalId":34736,"journal":{"name":"Plant Stress","volume":"14 ","pages":"Article 100615"},"PeriodicalIF":6.8,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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Plant Stress
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