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Ralstonia solanacearum is a major plant pathogen causing bacterial wilt, whose unpredictable onset hinders timely detection and effective control. Here, we report the design, preparation and field use of a dual pH-responsive multifunctional double network (DN) hydrogel for the efficient and sustainable control of bacterial wilt. The primary network of carboxylated agarose chelates Zn 2+ and loosens under acidic conditions (pH ≤ 5) to release a pesticide (zhongshengmycin) and Zn 2+ , while the secondary L-phenylalanine (Phe)/ Zn 2+ network disassembles to provide additional bioactive components (Phe and Zn 2+ ). This dual-triggered release achieves a combined antibacterial effect, enhances plant growth, and activates plant disease resistance pathways. A simple root application protects plants for up to 14 days, and field experiments demonstrate disease control for up to 30 days, significantly preserving tomato yield. Here, we present a sustainable, effective system for managing bacterial wilt and highlight the potential of smart hydrogels in crop protection. Bacterial wilts unpredictable onset makes control difficult. Here, the authors report on a dual pH-responsive hydrogel system which releases antimicrobial agents and plant immune elicitors, L-phenylalanine and zinc, in acidic soils to enable control of bacterial wilt.

Asparagine synthetase B (AS-B) is essential for nitrogen metabolism, but its broader physiological functions remain poorly understood. Here we show that the evolutionarily conserved Nicotiana benthamiana NbAS-B confers expression-dependent antiviral resistance and promotes plant growth. Multi-omics analyses indicate that NbAS-B-mediated antiviral immunity relies on glutamate-induced activation of Ca²⁺ signaling through the receptor GLR3.3, whereas its growth-promoting effect results from photosynthetic reprogramming. Building on these insights, we develop polyglutamate-loaded chitosan nanogels (PGANPs) to artificially manipulate this pathway. These nanogels efficiently enter plant tissues and enable sustained in situ release of glutamate, thereby mimicking and amplifying NbAS-B signaling outputs. PGANPs provide long-lasting systemic antiviral immunity while concurrently enhancing plant growth, without incurring metabolic costs. Our work identifies NbAS-B as a dual-function regulator linking metabolic status to immune activation and establishes PGANPs as an eco-friendly, controllable, and durable nanobiotechnology for managing viral diseases in crops. Controlling plant metabolism to improve growth and disease resistance has huge potential. Here, the authors find a conserved pathway which promotes antiviral resistance and promotes plant growth and develop polyglutamate-loaded chitosan nanogels to manipulate this pathway.

In summary, our study establishes that NbTLP1 plays a crucial role in mediating the SA signalling pathway, thereby contributing to the suppression of P. capsici infection through its interaction with NbPR1 to form a heterodimer. These findings provide a fundamental basis for the genetic enhancement of P. capsici‐resistant crops through targeted breeding strategies.

Plant virus infections commonly inhibit leaf photosynthesis, leading to characteristic symptoms such as chlorosis. However, whether a conserved mechanism underpins this phenomenon remains unclear. Here, we demonstrate that the coat protein (CP) of tobacco rattle virus (TRV) interacts with Nicotiana benthamiana ferredoxin (NbFd1) in chloroplasts, recruiting the 26S proteasome to promote NbFd1 degradation. This degradation reduces the net photosynthetic rate facilitated by NbFd1, ultimately causing leaf chlorosis. Notably, this interaction is not unique to TRV CP, as other viral proteins also recognise Fd1, suggesting a conserved mechanism among plant viruses. Evolutionary analyses indicate that Fd1 originated from prokaryotic photosynthetic bacteria and was maintained in plants through endosymbiosis under strong selective pressure. Notably, Fd1 from Selaginella moellendorffii, an early‐diverging vascular plant, is also recognised by TRV CP, suggesting an ancient origin of this interaction. In addition, Solanum lycopersicum Fd1 interacts with TRV CP, and its overexpression suppresses TRV‐GFP infection, supporting a defensive role. Together, these findings show that TRV CP targets Fd1 to impair host photosynthesis and promote symptom development, whereas highlighting the evolutionary significance of this interaction. TRV coat protein interacts with and destabilises chloroplast Fd1, impairing photosynthetic electron transport and compromising antiviral defence.

Asparagine synthetase is a key enzyme that catalyses the conversion of amide groups from glutamine or ammonium to aspartate, which leads to the generation of asparagine. However, the role of asparagine synthetase in plant immunity remains largely unknown. Here, we identified a Nicotiana benthamiana asparagine synthetase B (NbAS‐B) that associates with tomato mosaic virus coat protein‐interacting protein L (IP‐L) using the yeast two‐hybrid assay and examined its role in tobacco mosaic virus (TMV) resistance. The association of IP‐L with NbAS‐B was further confirmed by in vivo co‐immunoprecipitation, luciferase complementation imaging, and bimolecular fluorescence complementation assays. IP‐L and NbAS‐B interact in the nucleus and cytosol and IP‐L apparently stabilizes NbAS‐B, thus enhancing its accumulation. The expressions of IP‐L and NbAS‐B are continuously induced on TMV‐green fluorescent protein (GFP) infection. Co‐silencing of IP‐L and NbAS‐B facilitates TMV‐GFP infection. Overexpression of NbAS‐B in tobacco reduces TMV‐GFP infection by significantly improving the synthesis of asparagine. Furthermore, the external application of asparagine significantly inhibits the infection of TMV‐GFP by activating the salicylic acid signalling pathway. These findings hold the potential for the future application of asparagine in the control of TMV. Nicotiana benthamiana asparagine synthetase B (NbAS‐B) interacts with interacting protein L (IP‐L), facilitating the accumulation of NbAS‐B and increasing asparagine content, thus providing enhanced resistance to tobacco mosaic virus through the asparagine‐induced salicylic acid signalling pathway.

Peach brown rot, attributed to Monilinia fructicola, presents a significant threat to postharvest peach cultivation, causing losses of up to 80%. With an increasing number of countries, spearheaded by the European Union, imposing bans on chemical agents in fruit production, there is a growing interest in mining highly active antibacterial compounds from biological control strains for postharvest disease management. In this study, we highlight the unique ability of Streptomyces lincolnensis strain JCP1‐7 to inhibit M. fructicola sporulation, despite its limited antimicrobial efficacy. Through GC–MS analysis, eucalyptol was identified as the key compound. Fumigation of diseased fruits with eucalyptol at a concentration of 0.0335 μg cm−3 demonstrated an in vivo inhibition rate against M. fructicola of 93.13%, completely suppressing spore formation. Transcriptome analysis revealed the impact of eucalyptol on multiple pathogenesis‐related pathways, particularly through the inhibition of catalase 2 (Cat2) expression. Experiments with a MfCat2 knockout strain (ΔMfCat2) showed reduced pathogenicity and sensitivity to JCP1‐7 and eucalyptol, suggesting MfCat2 as a potential target of JCP1‐7 and eucalyptol against M. fructicola. Our findings elucidate that eucalyptol produced by S. lincolnensis JCP1‐7 inhibits M. fructicola sporulation by regulating MfCat2, thereby effectively reducing postharvest peach brown rot occurrence. The use of fumigation of eucalyptol offers insights into peach brown rot management on a large scale, thus making a significant contribution to agricultural research. Streptomyces lincolnensis strain JCP1‐7 produces eucalyptol, which inhibits catalase 2 activity in M. fructicola, leading to reduced sporulation and decreased pathogenicity, thereby preventing the occurrence of peach brown rot.

Ammonia (NH3) potentially harms human health, the ecosystem, industrial and agricultural production, and other fields. Therefore, the detection of NH3 has broad prospects and important significance. Ti3C2Tx is a common MXene material that is great for detecting NH3 at room temperature because it has a two-dimensional layered structure, a large specific surface area, is easy to functionalize on the surface, is sensitive to gases at room temperature, and is very selective for NH3. This review provides a detailed description of the preparation process as well as recent advances in the development of gas-sensing materials based on Ti3C2Tx MXene for room-temperature NH3 detection. It also analyzes the advantages and disadvantages of various preparation and synthesis methods for Ti3C2Tx MXene’s performance. Since the gas-sensitive performance of pure Ti3C2Tx MXene regarding NH3 can be further improved, this review discusses additional composite materials, including metal oxides, conductive polymers, and two-dimensional materials that can be used to improve the sensitivity of pure Ti3C2Tx MXene to NH3. Furthermore, the present state of research on the NH3 sensitivity mechanism of Ti3C2Tx MXene-based sensors is summarized in this study. Finally, this paper analyzes the challenges and future prospects of Ti3C2Tx MXene-based gas-sensitive materials for room-temperature NH3 detection.

Ammonia (NH ) potentially harms human health, the ecosystem, industrial and agricultural production, and other fields. Therefore, the detection of NH has broad prospects and important significance. Ti C T is a common MXene material that is great for detecting NH at room temperature because it has a two-dimensional layered structure, a large specific surface area, is easy to functionalize on the surface, is sensitive to gases at room temperature, and is very selective for NH . This review provides a detailed description of the preparation process as well as recent advances in the development of gas-sensing materials based on Ti C T MXene for room-temperature NH detection. It also analyzes the advantages and disadvantages of various preparation and synthesis methods for Ti C T MXene's performance. Since the gas-sensitive performance of pure Ti C T MXene regarding NH can be further improved, this review discusses additional composite materials, including metal oxides, conductive polymers, and two-dimensional materials that can be used to improve the sensitivity of pure Ti C T MXene to NH . Furthermore, the present state of research on the NH sensitivity mechanism of Ti C T MXene-based sensors is summarized in this study. Finally, this paper analyzes the challenges and future prospects of Ti C T MXene-based gas-sensitive materials for room-temperature NH detection.

Macrophage-derived foam cell formation elicited by oxidized low-density lipoprotein (oxLDL) is the hallmark of early atherogenesis. Detection of foam cell formation is conventionally practiced by Oil Red O (ORO) staining of lipid-laden macrophages. Other methods include 1,1′-dioctadecyl-3,3,3′3′-tetra-methylindocyanide percholorate (DiI)-labeled oxLDL (DiI-oxLDL) uptake and Nile Red staining. The purpose of the present study is to report an optimized method for assessing foam cell formation in cultured macrophages by ORO staining and DiI-oxLDL uptake. After incubation with oxLDL (50 μg/ml) for 24 h, the macrophages were fixed, stained with ORO for just 1 min, pronounced lipid droplets were clearly observed in more than 90% of the macrophages. To test the in vivo applicability of this method, lesions (or foam cells) of cryosections of aortic sinus or primary mouse peritoneal macrophages from ApoE deficient mice fed a high cholesterol diet were successfully stained. In another set of experiments, treatment of macrophages with DiI-oxLDL (10 μg/ml) for 4 h resulted in significant increase in oxLDL uptake in macrophages as demonstrated by confocol microscopy and flow cytometry. We conclude that the optimized ORO staining and fluorescent labeled oxLDL uptake techniques are very useful for assessing intracellular lipid accumulation in macrophages that are simpler and more rapid than currently used methods.

Neuromorphic devices have gained significant attention as potential building blocks for the next generation of computing technologies owing to their ability to emulate the functionalities of biological nervous systems. The essential components in artificial neural network such as synapses and neurons are predominantly implemented by dedicated devices with specific functionalities. In this work, we present a gate-controlled transition of neuromorphic functions between artificial neurons and synapses in monolayer graphene transistors that can be employed as memtransistors or synaptic transistors as required. By harnessing the reliability of reversible electrochemical reactions between C atoms and hydrogen ions, the electric conductivity of graphene transistors can be effectively manipulated, resulting in high on/off resistance ratio, well-defined set/reset voltage, and prolonged retention time. Overall, the on-demand switching of neuromorphic functions in a single graphene transistor provides a promising opportunity to develop adaptive neural networks for the upcoming era of artificial intelligence and machine learning.