Science China-Life Sciences
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2022
·Vol. 66
·期 5
·1119-1133
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IF 10.372
Luo Feifei,Tang Guirong,Hong Song,Gong Tianyu,Xin Xiu-Fang,Wang Chengshu
The ascomycete insect pathogenic fungi such as Metarhizium species have been demonstrated with the abilities to form the rhizosphere or endophytic relationships with different plants for nutrient exchanges. In this study, after the evident infeasibility of bacterial disease development in the boxed sterile soils, we established a hydroponic system for the gnotobiotic growth of Arabidopsis thaliana with the wild-type and transgenic strain of Metarhizium robertsii . The transgenic fungus could produce a high amount of pipecolic acid (PIP), a pivotal plant-immune-stimulating metabolite. Fungal inoculation experiments showed that M. robertsii could form a non-selective rhizosphere relationship with Arabidopsis . Similar to the PIP uptake by plants after exogenous application, PIP level increased in Col-0 and could be detected in the PIP-non-producing Arabidopsis mutant ( ald1 ) after fungal inoculations, indicating that plants can absorb the PIP produced by fungi. The transgenic fungal strain had a better efficacy than the wild type to defend plants against the bacterial pathogen and aphid attacks. Contrary to ald1, fmo1 plants could not be boosted to resist bacterial infection after treatments. After fungal inoculations, the phytoalexins camalexin and aliphatic glucosinolate were selectively increased in Arabidopsis via both PIP-dependent and -independent ways. This study unveils the potential mechanism of the fungus-mediated beneficial promotion of plant immunity against biological stresses. The data also highlight the added values of M. robertsii to plants beyond the direct suppression of insect pest populations.
研究领域:
植物学
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微生物学
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分子生物学
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DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 74
·69909-69918
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IF 3.289
Wentong Song,Shengyang Tao,Yongxian Yu,Xuanlu Du,Shuo Wang
This article reports a facile synthetic approach for preparing magnetic porous catalysts, on which various inorganic compounds are alternately loaded using a pyrogallic acid (PG)-assisted layer-by-layer (LbL) coating. The PG forms an adhesion and reductive layer on the surface of hierarchically porous silica, and Pd, Al2O3, ZrO2, or FeOx can then be introduced on the surface of the material. Compared with the conventional impregnation method, the PG layer obviously improves the dispersion of catalysts and greatly reduces the blocking of the pores, which is caused by the formation of metal oxide catalysts. At the same time, the reduction properties of the layer help to reduce the diameter of the Pd nanoparticles to 5 ± 1.3 nm. The Fe3+ ions are partially reduced into Fe2+ by the PG layer to form Fe3O4, which endows the porous catalysts with a magnetic separation property. The synthesized multicomponent catalysts show excellent catalytic activity for various reactions, including the Suzuki Miyaura coupling, reduction, Knoevenagel condensation and Friedel–Crafts alkylation reactions. The TOF values show an improvement of 2 to 4 times over those of the catalysts prepared by the traditional impregnation method. The multicomponent magnetic catalysts also exhibit superior catalytic performance for many one-pot multistep cascade reactions.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Jiling Zhao,Chen Wang,Shixing Wang,Libo Zhang,Bing Zhang
Many industrial wastewaters contain large amounts of palladium and the recovery of palladium from wastewater has great significance. Here, a new adsorbent (PMA-SNP) was synthesized by modifying nano-silica with pyromellitic anhydride to selectively adsorb Pd(II) in wastewater. Fourier transform infrared spectroscopy, scanning electron microscopy, Brunauer–Emmett–Teller equation, X-ray photoelectron spectroscopy and transmission electron microscopy were employed to characterize the adsorbent. At 25 °C, the adsorbent has the higher adsorption rate in the pH range of 2 to 5. The adsorption equilibrium is reached in 480 min and the maximum adsorption capacity is 53.61 mg/g. The adsorption kinetics and isotherms accord with pseudo-second-order and Langmuir models, respectively. The results show that the adsorption process is monolayer adsorption and the rate-limiting step is chemical adsorption. After five cycles, the removal rate of Pd(II) by PMA-SNP decreased slightly from 71.18% to 66.11% with good reusability. The thermodynamic data revealed that the adsorption was a spontaneous exothermic process. PMA-SNP can selectively adsorb palladium from wastewater containing various coexisting ions. Adsorption mechanism is based on the electrostatic and chelation interaction between Pd(II) ion and the O and N atoms. It can be concluded that PMA-SNP is an effective and promising adsorbent for the recovery of palladium from wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Environmental Science-Nano
·
2023
·Vol. 10
·期 2
·683-693
·
IF 7.3
Lei Han,Xue Zhen Dong,Shi Gang Liu,Xiao Hu Wang,Yu Ling,Nian Bing Li,Hong Qun Luo
The development of sensitive and prompt approaches for reliable determination of dipicolinic acid (DPA) is of great importance for human health and public security. Herein, we synthesized a bimetallic lanthanide metal–organic framework (Tb/Eu-MOF) using 2-hydroxyterephthalic acid as a ligand and lanthanide ions (Tb3+ and Eu3+) as central metal ions. The as-synthesized Tb/Eu-MOF possesses multiple recognition sites toward DPA. When present, DPA can displace the chelated water molecules and then coordinate with Tb3+ and Eu3+ to sensitize their luminescence. This causes the fluorescence of Tb3+ (546 nm) and Eu3+ (617 nm) to increase, while that of the ligand (432 nm) remains constant. Based on the multiple fluorescence signal responses of Tb/Eu-MOF toward DPA, a multi-ratiometric fluorescence sensor using (F546/F432) and (F617/F432) as output signals was developed to detect DPA. Moreover, an intrinsic signal amplification strategy is used to achieve more sensitive sensing of DPA by integrating the fluorescence signals of Tb3+, Eu3+, and ligand with (F546 + F617)/F432 as the output signal. Benefitting from the signal amplification and multiple fluorescence responses, this method shows high sensitivity and obvious fluorescence color variation toward DPA detection. This strategy offers a prompt, sensitive, and reliable method for the visual sensing of DPA.
研究领域:
生物化学
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分析化学
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公共安全
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2020
·Vol. 38
·期 6
·590-594
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IF 3.826
Dongdong Li,Chao Cai,Shijia Yang,Xun Xu,Xinwei Wang,Tang Zhu,Jing Guo,Ying Zhang,Haixia Dong,Xiaofeng Li,Ning Zhao,Jian Xu
Summary of main observation and conclusion Pyrogallic acid (PG) was used as a modeling carbon source in fabricating nano-structured hollow carbon materials (HCMs) by a chemical vapor deposition (CVD) method. We found that non-isothermal deposition can improve the integrity of the obtained HCMs. The different pyrolyzed species from PG under varied temperatures lead to the temperature-dependent deposition yield, graphitization degree and morphology of the HCMs. HCMs including hollow spheres of varied sizes, cubic boxes with yolk-shell structure, nanotubes, mesoporous particles and double-shelled fibers, were prepared by using different templates, demonstrating the universality of this strategy. The carbon source has been extended to other plant polyphenols. The abundant and renewable solid precursors for CVD method endow this strategy excellent operation safety, improved storage and transportation convenience and low cost, and would boost the production of morphology- and size-controlled HCMs and their applications in the fields such as water treatment, electrode materials, adsorbent, drug delivery, and so forth.
研究领域:
材料科学
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纳米技术
·
化学工程
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DOI
高影响因子
GENOMICS PROTEOMICS & BIOINFORMATICS
·
2022
·
IF 6.409
Lei Liu,Jia Wu,Minxin Shi,Fengying Wang,Haimin Lu,Jibing Liu,Weiqin Chen,Guanzhen Yu,Dan Liu,Jing Yang,Qin Luo,Yan Ni,Xing Jin,Xiaoxia Jin,Wen-Lian Chen
Esophageal squamous cell carcinoma (ESCC) is a major histological subtype of esophageal cancer with a poor prognosis. Although several serum metabolomic investigations have been reported, ESCC tumor-associated metabolic alterations and predictive biomarkers in sera have not been defined. Here, we enrolled 34 treatment-naive patients with ESCC and collected their pre- and post- esophagectomy sera together with the sera from 34 healthy volunteers for a metabolomic survey. Our comprehensive analysis identified ESCC tumor-associated metabolic alterations as represented by a panel of 12 serum metabolites. Notably, postoperative abrosia and parenteral nutrition substantially perturbed the serum metabolome . Furthermore, we performed an examination using sera from carcinogen-induced mice at the dysplasia and ESCC stages and identified three ESCC tumor-associated metabolites conserved between mice and humans. Notably, among these metabolites, the level of pipecolic acid was observed to be progressively increased in mouse sera from dysplasia to cancerization, and it could be used to accurately discriminate between mice at the dysplasia stage and healthy control mice. Furthermore, this metabolite is essential for ESCC cells to restrain oxidative stress-induced DNA damage and cell proliferation arrest. Together, this study revealed a panel of 12 ESCC tumor-associated serum metabolites with potential for monitoring therapeutic efficacy and disease relapse, presented evidence for refining parenteral nutrition composition, and highlighted serum pipecolic acid as an attractive biomarker for predicting ESCC tumorigenesis.
研究领域:
肿瘤学
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代谢组学
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生物标志物发现
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营养学
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产品关联
DOI
PubMed
高影响因子
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