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1. Organic chromium derived from the chelation of Ganoderma lucidum polysaccharide and chromium (III) alleviates metabolic syndromes and intestinal microbiota dysbiosis induced by high-fat and high-fructose diet

Author:
Xu-Cong Lv; Qi Wu; Yu-Jie Yuan; Lu Li; Wei-Ling Guo; Xiao-Bin Lin; Zi-Rui Huang; Ping-Fan Rao; Lian-Zhong Ai; Li Ni
Source:
International journal of biological macromolecules 2022 pp. -
ISSN:
0141-8130
Subject:
Ganoderma lucidum; absorption; acetyl-CoA carboxylase; alpha-linolenic acid; bile acids; biomarkers; biosynthesis; blood glucose; body weight; carboxy-lyases; chelation; cholesterol; chromium; dysbiosis; gene expression; glucose; glucose tolerance; glucose transporters; glucose-6-phosphatase; glycerophospholipids; high fructose diet; hyperglycemia; hyperlipidemia; intestinal microorganisms; intestines; lipid metabolism; liver; mechanism of action; metabolomics; oral administration; phylotype; polysaccharides; steroid hormones; toxicity; triacylglycerols
Abstract:
... Organic chromium is of great interest and has become an important chromium supplement resource in recent years because of its low toxicity and easy absorption. In our previous study, we synthesized a novel organic chromium [GLP-Cr] through the chelation of Ganoderma lucidum polysaccharide and chromium (III). The purpose of this study was to investigate the beneficial effects of GLP-Cr on the impro ...
DOI:
10.1016/j.ijbiomac.2022.07.211

2. The mineral weathering ability of Collimonas pratensis PMB3(1) involves a Malleobactin‐mediated iron acquisition system

Author:
Laura Picard; Cédric Paris; Tiphaine Dhalleine; Emmanuelle Morin; Philippe Oger; Marie‐Pierre Turpault; Stéphane Uroz
Source:
Environmental microbiology 2022 v.24 no.2 pp. 784-802
ISSN:
1462-2912
Subject:
acidification; biosynthesis; carbon; chelation; genome; hematite; iron; mutants; nonribosomal peptides; siderophores
Abstract:
... Mineral weathering by microorganisms is considered to occur through a succession of mechanisms based on acidification and chelation. While the role of acidification is established, the role of siderophores is difficult to disentangle from the effect of the acidification. We took advantage of the ability of strain Collimonas pratensis PMB3(1) to weather minerals but not to acidify depending on the ...
DOI:
10.1111/1462-2920.15508

3. Citric acid-mediated abiotic stress tolerance in plants

Author:
Tahjib-Ul-Arif Md; Zahan Mst Ishrat; Karim Md Masudul; Imran Shahin; Iii Charles T.; Islam Md Saiful; Mia Md Ashik; Hannan Md Abdul; Rhaman Mohammad Saidur; Hossain Md Afzal; Brestic Marian; Skalicky Milan; Murata Yoshiyuki
Source:
International journal of molecular sciences 2021 v.22 no.13 pp. 7235
ISSN:
1422-0067
Subject:
abiotic stress; antioxidant activity; biosynthesis; chelation; chlorophyll; citrates; citric acid; heavy metals; osmoregulation; plant growth; plant hormones; reactive oxygen species; secondary metabolites; stress tolerance
Abstract:
... Several recent studies have shown that citric acid/citrate (CA) can confer abiotic stress tolerance to plants. Exogenous CA application leads to improved growth and yield in crop plants under various abiotic stress conditions. Improved physiological outcomes are associated with higher photo-synthetic rates, reduced reactive oxygen species, and better osmoregulation. Application of CA also induces ...
Handle:
10113/7481989
DOI:
10.3390/ijms22137235

4. Comparative transcriptome analysis of the hyperaccumulator plant Phytolacca americana in response to cadmium stress

Author:
Le Zhao; Yun-Hao Zhu; Min Wang; Li-Gang Ma; Yong-Guang Han; Meng-Jia Zhang; Xing-Can Li; Wei-Sheng Feng; Xiao-Ke Zheng
Source:
3 Biotech 2021 v.11 no.7 pp. 327
ISSN:
2190-572X
Subject:
Phytolacca americana; biosynthesis; cadmium; cell walls; chelation; databases; flavonoids; gene expression regulation; glutathione; heavy metals; hyperaccumulators; lignin; photosynthesis; sulfur; thiols; transcriptome; transcriptomics; unigenes; vacuoles
Abstract:
... To study the molecular mechanism of the hyperaccumulator plant Phytolacca americana against cadmium (Cd) stress, the leaves of P. americana treated with 400 μM Cd for 0, 2, 12, and 24 h were harvested for comparative transcriptome analysis. In total, 110.07 Gb of clean data were obtained, and 63,957 unigenes were acquired after being assembled. Due to the lack of P. americana genome information, o ...
DOI:
10.1007/s13205-021-02865-x

5. Comparative transcriptome combined with biochemical and physiological analyses provide new insights toward cadmium accumulation with two contrasting Nicotiana species

Author:
Yan Zhang; Jiangtao Chao; Xiuchun Li; Chong Zhang; Rayyan Khan; Shasha Du; Na Xu; Lin Song; Haiwei Liu; Yi Shi
Source:
Physiologia plantarum 2021 v.173 no.1 pp. 369-383
ISSN:
0031-9317
Subject:
Nicotiana rustica; Nicotiana tabacum; biosynthesis; cadmium; cell walls; chelation; cytoplasm; enzyme activity; fauna; flora; gene expression regulation; glutathione transferase; oxidation; phenylalanine; soil; superoxide dismutase; toxicity; transcriptome; transcriptomics
Abstract:
... Cadmium (Cd) is known as one of the most hazardous elements in the environment and a persistent soil constraint toxic to all flora and fauna. In this study, we conducted physiological, biochemical, and transcriptomic analyses of Nicotiana rustica (N. rustica) and Nicotiana tabacum (N. tabacum) treated with CdCl₂ to know the underlying molecular mechanisms of Cd accumulation. As a result, N. rustic ...
DOI:
10.1111/ppl.13431

6. Higher Cd-accumulating oilseed rape has stronger Cd tolerance due to stronger Cd fixation in pectin and hemicellulose and higher Cd chelation

Author:
Xiuwen Wu; Hui Tian; Li Li; Chunyun Guan; Zhenhua Zhang
Source:
Environmental pollution 2021 v.285 pp. 117218
ISSN:
0269-7491
Subject:
Brassica napus; biosynthesis; cadmium; cell walls; chelation; demethylation; genotype; hemicellulose; hyperaccumulators; pectinesterase; pectins; phytoremediation; pollution; polygalacturonase; protoplasts; thylakoids; toxicity; transcription (genetics)
Abstract:
... Oilseed rape (Brassica napus) has potential as a hyperaccumulator in the phytoremediation of cadmium (Cd)-contaminated soils. Oilseed rape varieties with higher Cd accumulation ability and Cd tolerance are ideal candidates for the hyperaccumulation of excess Cd. To explore the physiological and molecular mechanisms underlying Cd tolerance and high Cd accumulation in oilseed rape leaves, we examine ...
DOI:
10.1016/j.envpol.2021.117218

7. IRONing out stress problems in crops: a homeostatic perspective

Author:
Tirthankar Bandyopadhyay; Manoj Prasad
Source:
Physiologia plantarum 2021 v.171 no.4 pp. 559-577
ISSN:
0031-9317
Subject:
biosynthesis; chelation; chlorophyll; ecophysiology; electron transfer; genetically modified organisms; homeostasis; oxidation; oxidative phosphorylation; plant growth; rhizosphere; soil
Abstract:
... Iron (Fe) is essential for plant growth and therefore plays a key role in influencing crop productivity worldwide. Apart from its central role in chlorophyll biosynthesis and oxidative phosphorylation (electron transfer), it is an important constituent of many enzymes involved in primary metabolism. Fe has different accessibilities to the roots in the rhizosphere depending upon whether it is ferro ...
DOI:
10.1111/ppl.13184

8. Lead accumulation in photosynthetic Euglena gracilis depends on polyphosphates and calcium

Author:
M. Hernández-Garnica; J.D. García-García; R. Moreno-Sánchez; R. Sánchez-Thomas
Source:
Environmental pollution 2021 v.272 pp. 116007
ISSN:
0269-7491
Subject:
Euglena gracilis; biosynthesis; calcium; cell growth; chelation; chlorophyll; hyperaccumulators; lead; oxygen consumption; photosynthesis; pollution; polyphosphates; sulfates; thiols; viability
Abstract:
... Worldwide increasing levels of lead in water systems require the search for efficient ecologically friendly strategies to remove it. Hence, lead accumulation by the free-living algae-like Euglena gracilis and its effects on cellular growth, respiration, photosynthesis, chlorophyll, calcium, and levels of thiol- and phosphate-molecules were analyzed. Photosynthetic cells were able to accumulate 462 ...
DOI:
10.1016/j.envpol.2020.116007

9. Physiological, anatomical, and transcriptional responses of mulberry (Morus alba L.) to Cd stress in contaminated soil

Author:
Zhaohui Guo; Peng Zeng; Xiyuan Xiao; Chi Peng
Source:
Environmental pollution 2021 v.284 pp. 117387
ISSN:
0269-7491
Subject:
Morus alba; abscisic acid; antioxidant enzymes; ascorbate peroxidase; biosynthesis; catalase; catalytic activity; cell walls; chelation; enzyme activity; ethylene; gene expression regulation; gene ontology; glutathione; leaves; minerals; mitogen-activated protein kinase; mulberries; peroxidase; photosynthesis; poisoning; polluted soils; pollution; signal transduction; transcription (genetics); transcriptome; transportation
Abstract:
... Mulberry has been widely studied for its capacity to tolerate heavy metals. However, the anatomical and molecular response mechanisms of Cd detoxification and transportation in mulberry have not been fully elucidated. In this study, the anatomical characteristics, Cd and mineral element uptake and transport, and transcriptome profiling of mulberry were studied under Cd stress. The results showed t ...
DOI:
10.1016/j.envpol.2021.117387

10. Rationally designed Shewanella oneidensis Biofilm Toilored Graphene-Magnetite Hybrid Nanobiocomposite as Reusable Living Functional Nanomaterial for Effective Removal of Trivalent Chromium

Author:
Baskaran Ramalingam; Srinivasan Shanmugham Venkatachalam; Manikantan Syamala Kiran; Sujoy K. Das
Source:
Environmental pollution 2021 v.278 pp. 116847
ISSN:
0269-7491
Subject:
Shewanella oneidensis; adsorption; aqueous solutions; biofilm; biomass; biosynthesis; carbohydrates; chelation; chemical composition; chromium; graphene; magnetic separation; nanocomposites; pH; pollution; polymers; response surface methodology; surface area; synergism; wastewater; wastewater treatment; zeta potential
Abstract:
... Sustainable treatment of wastewater containing trivalent chromium (Cr³⁺) remains a significant challenge owing to the several limitations of the existing methodologies. Herein, combination of biosynthesis and Response Surface Methodology (RSM) for the fabrication and optimization of Shewanella oneidensis biofilm functionalized graphene-magnetite (GrM) nanobiocomposite was adopted as a ‘living func ...
DOI:
10.1016/j.envpol.2021.116847

11. Root Defense in Salicylic Acid-Altering Arabidopsis Plants in Responses to Cadmium Stress

Author:
Qiyu Zhao; Chunxiu Gu; Yuehang Sun; Guangzhe Li; Lin-Lin Li; Lin Hao
Source:
Journal of plant growth regulation 2021 v.40 no.4 pp. 1764-1776
ISSN:
0721-7595
Subject:
Arabidopsis; biosynthesis; cadmium; cell walls; chelation; flavonoids; genes; mutants; naphthalene; oxidative stress; pectinesterase; plant growth; salicylic acid
Abstract:
... The regulatory role of salicylic acid (SA) has been extensively reported in plants subjected to cadmium (Cd) stress. However, the underlying mechanisms still remain to be elucidated. This study provided evidence that root biological processes played crucial roles in SA-altering Arabidopsis plant responses to Cd stress. The nahG (naphthalene hydroxylase G)-transformed plants (with a significantly r ...
DOI:
10.1007/s00344-020-10233-x

12. Specific gene SEN1393 contributes to higher survivability of Salmonella Enteritidis in egg white by regulating sulfate assimilation pathway

Author:
Bin Liu; Wanwan Hou; Ke Li; Qing Chen; Yaxin Liu; Tianli Yue
Source:
International journal of food microbiology 2021 v.337 pp. 108927
ISSN:
0168-1605
Subject:
RNA; Salmonella Enteritidis; arginine; bacterial growth; bacterial motility; biosynthesis; chelation; egg albumen; food microbiology; genes; homeostasis; mutants; nucleotide sequences; sulfates; tricarboxylic acid cycle
Abstract:
... Salmonella enterica serovar Enteritidis (S. Enteritidis) presents an excellent capacity to survive in egg white, which is a hostile environment for bacterial growth. To reveal its survival mechanism, this study focuses on the specific gene SEN1393, which has been found to exist only in the genomic sequence of S. Enteritidis. The survival capacity of the deletion mutant strain ΔSEN1393 was proven t ...
DOI:
10.1016/j.ijfoodmicro.2020.108927

13. Unravelling Phytotoxicity and Mode of Action of Tripyrasulfone, a Novel Herbicide

Author:
Hengzhi Wang; Lipeng Wang; Xiaolin Zhang; Shuang Bai; Tao Jin; Weitang Liu; Jinxin Wang
Source:
Journal of agricultural and food chemistry 2021 v.69 no.25 pp. 7168-7177
ISSN:
1520-5118
Subject:
4-hydroxyphenylpyruvate dioxygenase; Arabidopsis thaliana; Echinochloa crus-galli; Escherichia coli; Spirodela polyrhiza; biosynthesis; carotenoids; chelation; chemical structure; death; electron transport chain; energy; food chemistry; hydrolysis; mechanism of action; mesotrione; necrosis; paddies; photosystem II; phytotoxicity; reactive oxygen species
Abstract:
... Tripyrasulfone is a novel herbicide post-emergence applied in paddy fields. In this study, tripyrasulfone phytotoxicity and its mode of action were investigated. Within 3–7 days after treatment (DAT), tripyrasulfone caused strong bleaching symptoms on newly developed leaves of Echinochloa crus-galli followed by necrosis prior to death within 14 DAT. By investigating pigment composition, photosynth ...
DOI:
10.1021/acs.jafc.1c01294

14. The critical role of the shoot base in inhibiting cadmium transport from root to shoot in a cadmium-safe rice line (Oryza sativa L.)

Author:
Keji Wang; Haiying Yu; Daihua Ye; Yongdong Wang; Xizhou Zhang; Huagang Huang; Zicheng Zheng; Tingxuan Li
Source:
Science of the total environment 2021 v.765 pp. 142710
ISSN:
0048-9697
Subject:
Oryza sativa; biosynthesis; brown rice; cadmium; chelation; environment; glutathione; glutathione transferase; humans; phytochelatins
Abstract:
... Cadmium (Cd) is harmful to rice and human, thus screening and understanding the mechanism of Cd-safe rice lines, which accumulate little Cd in brown rice, is necessary. D62B was screened as a Cd-safe rice line with low Cd translocation from roots to shoots, and there must be a switch restricting Cd transport from roots to shoots. Here we found that shoot base played the role as switch. Cd concentr ...
DOI:
10.1016/j.scitotenv.2020.142710

15. The Availability of Iron Is Involved in the Murine Experimental Toxoplasma gondii Infection Outcome

Author:
Mário Cézar Oliveira; Loyane Bertagnolli Coutinho; Marcos Paulo Oliveira Almeida; Marisol Pallete Briceño; Ester Cristina Borges Araujo; Neide Maria Silva
Source:
Microorganisms 2020 v.8 no.4 pp. -
ISSN:
2076-2607
Subject:
Protozoa; Toxoplasma gondii; biodegradation; biosynthesis; blood serum; chelating agents; chelation; deferoxamine; dysbiosis; ferrous sulfate; fetal development; histology; immune response; inflammation; iron; iron overload; liver; lungs; medicine; mice; parasite load; parasitism; small intestine
Abstract:
... Iron is an important constituent of our environment, being necessary for both mammalian and pathogenic protozoa survival. Iron-containing proteins exert a wide range of biological processes such as biodegradation and biosynthesis, as well as immune function, fetal development, and physical and mental well-being. This work aimed to investigate the effect of iron deprivation in Toxoplasma gondii inf ...
DOI:
10.3390/microorganisms8040560

16. Boron alleviates cadmium toxicity in Brassica napus by promoting the chelation of cadmium onto the root cell wall components

Author:
Xiuwen Wu; Haixing Song; Chunyun Guan; Zhenhua Zhang
Source:
Science of the total environment 2020 v.728 pp. 138833
ISSN:
0048-9697
Subject:
Brassica napus; Fourier transform infrared spectroscopy; atomic absorption spectrometry; biosynthesis; boron; cadmium; cell viability; cell walls; cellulose; chelation; demethylation; environment; fluorescent dyes; hemicellulose; metabolomics; organelles; pectins; plant root cells; polygalacturonase; rapeseed; reactive oxygen species; rice oil; toxicity; transcriptomics; xyloglucan:xyloglucosyl transferase; China
Abstract:
... In Southern China, rice-oil rotations occur on soils with high levels of cadmium (Cd) and low levels of available boron (B). Boron can alleviate Cd toxicity, as it affects the plant cell wall structures and the components that block the entry of Cd into the cytoplasm; however, these mechanisms are not well understood. Fourier transform infrared spectroscopy (FTIR), fluorescent probe dye, electron ...
DOI:
10.1016/j.scitotenv.2020.138833

17. L- Carnitine supplementation improved population growth, photosynthetic pigment synthesis and antioxidant activity of marine Chlorella sp.

Author:
Sen Wang; Yu-ke Chen; Abdallah Ghonimy; Ting Yu; Yong-sheng Gao; Zhen-chao Wu; Qiu-ju Wang; Dong-ming Zhang
Source:
Aquaculture reports 2020 v.17 pp. 100394
ISSN:
2352-5134
Subject:
Chlorella; antioxidant activity; beta-carotene; biosynthesis; carnitine; chelation; chlorophyll; fish fry; gene expression; gene expression regulation; genes; iron; lethal concentration 50; live feeds; magnesium; microalgae; nutritive value; photosynthesis; population density; population growth; specific growth rate
Abstract:
... High nutritive microalgae is a key factor that affecting the live feeds nutritional value and subsequently fish fry quality. We evaluated the effect of l-carnitine supplementation level on the population growth, photosynthetic pigment biosynthesis, and antioxidant capability of the pigment-protein complexes in the marine Chlorella sp. Five different l-carnitine levels (0, 5, 50, 100, and 200 mg L⁻ ...
DOI:
10.1016/j.aqrep.2020.100394

18. Recent developments in siderotyping: procedure and application

Author:
Pratika Singh; Azmi Khan; Rakesh Kumar; Ravinsh Kumar; Vijay Kumar Singh; Amrita Srivastava
Source:
World journal of microbiology & biotechnology 2020 v.36 no.12 pp. 178
ISSN:
0959-3993
Subject:
bioinformatics; bioremediation; biosensors; biosynthesis; biotechnology; chelation; chemical structure; microbiology; peptides; secondary metabolites; siderophores; starvation
Abstract:
... Siderophores are metal chelating secondary metabolites secreted by almost all organisms. Beside iron starvation, the ability to produce siderophores depends upon several other factors. Chemical structure of siderophore is very complex with vast structural diversity, thus the principle challenge involves its detection, quantification, purification and characterisation. Metal chelation is its most f ...
DOI:
10.1007/s11274-020-02955-7

19. Tannins as an alternative to antibiotics

Author:
Arakkaveettil Kabeer Farha; Qiong-Qiong Yang; Gowoon Kim; Hua-Bin Li; Fan Zhu; Hong-Yan Liu; Ren-You Gan; Harold Corke
Source:
Food bioscience 2020 v.38 pp. 100751
ISSN:
2212-4292
Subject:
adhesins; bacterial growth; biofilm; biosynthesis; cell membranes; cell walls; chelation; fatty acids; gene expression; human health; hydrogels; molecular weight; multiple drug resistance; polyphenols; virulence
Abstract:
... Excessive use of antibiotics has led to the emergence of multidrug-resistant bacteria that are a serious threat to human health. There is a need to develop efficient antibacterial agents to address this problem. Tannins are high molecular weight (MW) polyphenols (500−30,000 Da), distributed throughout the plant kingdom. Tannins are one of the major compounds in plants with potential health benefit ...
DOI:
10.1016/j.fbio.2020.100751

20. Advances in the antimicrobial and therapeutic potential of siderophores

Author:
Marta Ribeiro; Manuel Simões
Source:
Environmental chemistry letters 2019 v.17 no.4 pp. 1485-1494
ISSN:
1610-3653
Subject:
antibiotics; bacterial growth; biosynthesis; chelation; drug therapy; environmental science; iron; siderophores; starvation; virulence
Abstract:
... The increasing bacterial resistance from antibiotic overuse has fostered the search for novel antimicrobial strategies. In particular, bacterial systems involving iron (Fe) uptake are studied to develop new therapeutics against infectious diseases, because iron is crucial for bacterial growth and is a main virulence factor for infection. Iron assimilation is commonly based on the production of sid ...
DOI:
10.1007/s10311-019-00887-9

21. Ambiguity of NRPS Structure Predictions: Four Bidentate Chelating Groups in the Siderophore Pacifibactin

Author:
Clifford D. Hardy; Alison Butler
Source:
Journal of natural products 2019 v.82 no.4 pp. 990-997
ISSN:
1520-6025
Subject:
Alcanivorax; bioinformatics; biosynthesis; chelation; enzymes; gallium; genome mining; iron; ligands; multigene family; nuclear magnetic resonance spectroscopy; peptides; photochemical reactions; prediction; siderophores; titration
Abstract:
... Identified through a bioinformatics approach, a nonribosomal peptide synthetase gene cluster in Alcanivorax pacificus encodes the biosynthesis of the new siderophore pacifibactin. The structure of pacifibactin differs markedly from the bioinformatic prediction and contains four bidentate metal chelation sites, atypical for siderophores. Genome mining and structural characterization of pacifibactin ...
DOI:
10.1021/acs.jnatprod.8b01073

22. Built to bind: biosynthetic strategies for the formation of small-molecule protease inhibitors

Author:
Leonard Kaysser
Source:
Natural product reports 2019 v.36 no.12 pp. 1654-1686
ISSN:
1460-4752
Subject:
Lewis acids; Lewis bases; active sites; biosynthesis; chelation; diabetes; genome; hypertension; medicine; metalloproteinases; peptides; thrombosis
Abstract:
... Covering: up to 2019 Inhibitors of proteases and related enzymes have versatile applications in medicine and other areas. They are used in the clinic e.g. for the treatment of cancer, hypertension, thrombosis, diabetes as well as viral and bacterial infections. Most of these drugs are produced synthetically but a substantial part of them has been developed from or are inspired by natural products. ...
DOI:
10.1039/c8np00095f

23. Comprehensive analysis of phenotype, microstructure and global transcriptional profiling to unravel the effect of excess copper on the symbiosis between nitrogen-fixing bacteria and Medicago lupulina

Author:
Minxia Chou; Yali Sun; Jieyu Yang; Yujie Wang; Yajuan Li; Guijie Yuan; Dehui Zhang; Jiamei Wang; Gehong Wei
Source:
Science of the total environment 2019 v.656 pp. 1346-1357
ISSN:
0048-9697
Subject:
Medicago lupulina; antimicrobial properties; antioxidant activity; biosynthesis; cell walls; chelation; copper; ecological restoration; ethylene; gene expression; gene expression regulation; genes; heavy metals; legumes; metal tolerance; microstructure; nitrogen-fixing bacteria; nodulation; peptides; phenotype; sequence analysis; symbiosis; transcription (genetics); ultrastructure
Abstract:
... Legume-rhizobial symbiosis plays an important role in agriculture and ecological restoration. However, knowledge of the molecular mechanisms, especially the microstructure and global transcriptional profiling, of the symbiosis process under heavy metal contamination is limited. In this study, a heavy metal-tolerant legume, Medicago lupulina, was treated with different concentrations of copper (Cu) ...
DOI:
10.1016/j.scitotenv.2018.12.005

24. Iron and zinc accumulation in winter wheat regulated by NICOTIANAMINE SYNTHASE responded to increasing nitrogen levels

Author:
Rong-Rong Zhao; Bao-Yuan Qu; Yi-Ping Tong; Chun-Qin Zou
Source:
Journal of plant nutrition 2019 v.42 no.14 pp. 1624-1636
ISSN:
1532-4087
Subject:
Triticum; biofortification; biosynthesis; chelation; gene expression; gene expression regulation; genes; hydroponics; iron; leaves; nicotianamine; nicotianamine synthase; nitrogen; nitrogen compounds; phloem; roots; winter wheat; zinc
Abstract:
... Nitrogen (N) is critical for micronutrient biofortification in wheat grain and is essential for a series of nitrogenous compounds biosynthesis. This study aims to assess the role of improved N supply in iron (Fe) and zinc (Zn) enrichment and expression of genes related to Zn and Fe chelation and transport in winter wheat. Potting and hydroponic culture experiments were conducted to study the effec ...
DOI:
10.1080/01904167.2019.1630427

25. A unique aluminum resistance mechanism conferred by aluminum and salicylic-acid-activated root efflux of benzoxazinoids in maize

Author:
Zunkang Zhao; Xiaofeng Gao; Ye Ke; Minmin Chang; Lu Xie; Xiaofeng Li; Minghua Gu; Jiping Liu; Xinlian Tang
Source:
Plant and soil 2019 v.437 no.1-2 pp. 273-289
ISSN:
0032-079X
Subject:
aluminum; benzoxazinoids; biosynthesis; chelation; corn; cultivars; exudation; hydroxamic acids; root growth; root tips; salicylic acid
Abstract:
... BACKGROUND AND AIMS: Although aluminum (Al) exclusion via root exudation of organic matters is a common resistance mechanism adopted by many plant species, whether root exudation of benzoxazinoids, such as hydroxamic acids (HAs), confers Al resistance remains unclear. METHODS: We performed physiological characterization for an Al-resistant maize cultivar TY and a sensitive maize cultivar ZD. RESUL ...
DOI:
10.1007/s11104-019-03971-9

26. Interactions between aluminium, iron and silicon in Cucumber sativus L. grown under acidic conditions

Author:
Nikolai P. Bityutskii; Kirill L. Yakkonen; Anastasiya I. Petrova; Alexey L. Shavarda
Source:
Journal of plant physiology 2017 v.218 pp. 100-108
ISSN:
0176-1617
Subject:
Cucumis sativus; acid soils; aluminum; biosynthesis; chelation; cucumbers; cultivars; fumaric acid; genotype; hydroponics; iron; metabolomics; nutrient solutions; pH; plant growth; roots; sap; serine; shoots; silicon; succinic acid; xylem
Abstract:
... Aluminium (Al) is one of the major stressors for plants in acidic soils, negatively affecting plant growth and nutrient balances. Significant efforts have been undertaken to understand mechanisms of Al tolerance in plants. However, little is known of the relevance of iron (Fe) and silicon (Si) nutrition under Al stress conditions. The objectives of this study were to determine whether effects indu ...
DOI:
10.1016/j.jplph.2017.08.003

27. Mobilization of Iron by Plant-Borne Coumarins

Author:
Huei Hsuan Tsai; Wolfgang Schmidt
Source:
Trends in plant science 2017 v.22 no.6 pp. 538-548
ISSN:
1360-1385
Subject:
alkaline soils; biosynthesis; chelation; coumarins; crops; iron; pH; plant communities; solubility
Abstract:
... Iron is one of the most abundant elements in soils, but its low phytoavailability at high pH restricts plant communities on alkaline soils to taxa that have evolved efficient strategies to increase iron solubility. Recent evidence provides support for a previously underestimated role of root-secreted coumarins in mobilizing iron through reduction and chelation as part of an orchestrated strategy e ...
DOI:
10.1016/j.tplants.2017.03.008

28. Synthesis, nature and utility of universal iron chelator − siderophore: a review

Author:
Azmi Khan; Pratika Singh; Amrita Srivastava
Source:
Microbiological research 2017 pp. -
ISSN:
0944-5013
Subject:
antimicrobial properties; bioremediation; biosynthesis; chelating agents; chelation; heavy metals; iron; mammals; microorganisms; oxidative stress; pathogens; peptides; secondary metabolites; siderophores; stress tolerance; virulence
Abstract:
... Siderophores, the secondary metabolite of various microorganisms are ferric ion specific chelators secreted under iron stressed condition. These non-ribosomal peptides have been classified as catecholate, hydroxamate, carboxylate and mixed types. Recent studies focus on discovery of possible mammalian siderophores. The biosynthesis pathway including non-ribosomal dependent as well as non-ribosomal ...
DOI:
10.1016/j.micres.2017.10.012

29. Talarazines A–E: Noncytotoxic Iron(III) Chelators from an Australian Mud Dauber Wasp-Associated Fungus, Talaromyces sp. (CMB-W045)

Author:
Kalansuriya Pabasara; Quezada Michelle; Espósito Breno P.; Capon Robert J.
Source:
Journal of natural products 2017 v.80 no.3 pp. 609-615
ISSN:
1520-6025
Subject:
Talaromyces; biosynthesis; chelating agents; chelation; chemical analysis; culture media; fungi; iron; metabolites; mud daubers; siderophores; spectral analysis
Abstract:
... Chemical analysis of an Australian mud dauber wasp-associated fungus, Talaromyces sp. (CMB-W045), yielded five new coprogen siderophores, talarazines A–E (1–5), together with dimerumic acid (6), desferricoprogen (7), and elutherazine B (8). Structures inclusive of absolute configuration were assigned on the basis of detailed spectroscopic analysis and application of the C₃ Marfey’s method. We repo ...
DOI:
10.1021/acs.jnatprod.6b00889

30. Glutathione-mediated regulation of nitric oxide, S-nitrosothiol and redox homeostasis confers cadmium tolerance by inducing transcription factors and stress response genes in tomato

Author:
Md Kamrul Hasan; Golam Jalal Ahammed; Jie Zhou; Ming-Xing Xu; Jing-Quan Yu; Xiao-Jian Xia
Source:
Chemosphere 2016 pp. -
ISSN:
0045-6535
Subject:
reactive oxygen species; vacuoles; genes; roots; oxidative stress; tomatoes; glutathione; cell walls; cadmium; homeostasis; gene expression regulation; transcription factors; plant growth; phytochelatins; enzyme activity; biosynthesis; nitric oxide; phytotoxicity; stress response; chelation
Abstract:
... Glutathione (GSH) plays a critical role in plant growth, development and responses to stresses. However, the mechanism by which GSH regulates tolerance to cadmium (Cd) stress still remains unclear. Here we show that inhibition of GSH biosynthesis by buthionine sulfoximine (BSO) aggravated Cd toxicity by increasing accumulation of reactive oxygen species (ROS) and reducing contents of nitric oxide ...
DOI:
10.1016/j.chemosphere.2016.07.053

31. Dissection of Porphyrin-Induced Conformational Dynamics in the Heme Biosynthesis Enzyme Ferrochelatase

Author:
Asuru Awuri P.; An Mier; Busenlehner Laura S.
Source:
Biochemistry 2012 v.51 no.36 pp. 7116-7127
ISSN:
1520-4995
Subject:
active sites; biosynthesis; chelation; deuterium; heme; humans; iron; mass spectrometry; protoporphyrin; solvents
Abstract:
... Human ferrochelatase (EC 4.99.1.1) catalyzes the insertion ferrous iron into protoporphyrin IX as the last step in heme biosynthesis, an essential process to most organisms given the vast intracellular functions of heme. Even with multiple ferrochelatase structures available, the exact mechanism for iron insertion into porphyrin is still a matter for debate. It is clear, however, that conformation ...
DOI:
10.1021/bi300704c

32. Structure, biosynthesis and possible function of tunichromes and related compounds

Author:
Manickam Sugumaran; William E. Robinson
Source:
Comparative biochemistry and physiology 2012 v.163 no.1 pp. 1-25
ISSN:
1096-4959
Subject:
Ascidiacea; antibiotics; bioactive properties; biocompatible materials; biosynthesis; blood cells; chelation; crosslinking; insects; iron; oligopeptides; post-translational modification; proteins; sclerotization; tissue repair; tyrosine; vanadium
Abstract:
... Several species of ascidians (phylum Chordata, subphylum Urochordata) contain a group of oligopeptides called “tunichromes” in their blood cells. These peptides have been implicated in (a) metal chelation and accumulation/sequestration of vanadium or iron; (b) crosslinking of structural fibers in tunic formation, (c) wound healing and (d) defense reactions. However, their biosynthesis, metabolism, ...
DOI:
10.1016/j.cbpb.2012.05.005

33. Citrate Stimulates Oligosaccharide Synthesis in Metabolically Engineered Agrobacterium sp.

Author:
Anne M. Ruffing; Rachel Ruizhen Chen
Source:
Applied biochemistry and biotechnology 2011 v.164 no.6 pp. 851-866
ISSN:
0273-2289
Subject:
Agrobacterium; Escherichia coli; buffers; carbon; chelation; citrates; energy; hosts; metabolism; metal ions; pH; solubility; sucrose
Abstract:
... Agrobacterium sp. ATCC 31749 was previously shown to be an advantageous host for oligosaccharide production. Unexpectedly, the addition of citrate to the oligosaccharide synthesis reaction resulted in up to a sixfold improvement in the production N-aceytl-lactosamine, a disaccharide. The possible mechanisms for this citrate-induced stimulation of oligosaccharide production were investigated, inclu ...
DOI:
10.1007/s12010-011-9179-1
PubMed:
21302148

34. Siderophore production and utilization by milk spoilage Pseudomonas species

Author:
Brown, A.G.; Luke, R.K.J.
Source:
Journal of dairy science 2010 v.93 no.4 pp. 1355-1363
ISSN:
0022-0302
Subject:
siderophores; food spoilage; Pseudomonas; milk quality; iron; dietary minerals; bacterial contamination; chelation; nutrient uptake; psychrotrophic bacteria; strain differences
Abstract:
... Many bacteria respond to potentially growth-limiting availability of iron by producing low-molecular-weight iron chelators (siderophores). The aim of this work was to examine the siderophores synthesized and utilized by Pseudomonas spp. implicated in milk spoilage. Twenty isolates of Pseudomonas spp. previously shown to have significant milk spoilage potential were tested for the ability to produc ...
DOI:
10.3168/jds.2009-2395
PubMed:
20338412

35. Antioxidant and melanogenesis-inhibitory activities of collagen peptide from jellyfish (Rhopilema esculentum)

Author:
Zhuang, Yongliang; Sun, Liping; Zhao, Xue; Wang, Jingfeng; Hou, Hu; Li, Bafang
Source:
Journal of the science of food and agriculture 2009 v.89 no.10 pp. 1722-1727
ISSN:
0022-5142
Subject:
reaction inhibition; biosynthesis; cosmetics; copper; melanoma; proteinases; proteolysis; seafoods; collagen; peptides; free radical scavengers; Scyphozoa; enzymatic hydrolysis; melanin; cell lines; antioxidant activity; chelation
Abstract:
... BACKGROUND: Jellyfish collagen was hydrolysed with trypsin and properase E, and jellyfish collagen peptide (JCP) was purified from the enzymatic hydrolysate using ion exchange chromatography and gel filtration. The antioxidant activity of JCP in a linoleic acid emulsion system, its superoxide anion- and hydroxyl radical-scavenging activities and its copper-chelating ability were evaluated in vitro ...
DOI:
10.1002/jsfa.3645

36. Chlorella vulgaris up-modulation of myelossupression induced by lead: The role of stromal cells

Author:
Queiroz, Mary L.S.; Torello, Christiane O.; Perhs, Simone M.C.; Rocha, Michelle C.; Bechara, Etelvino J.H.; Morgano, Marcelo A.; Valadares, Marize C.; Rodrigues, Ana Paula O.; Ramos, Aline Lisie; Soares, Chrislaine O.
Source:
Food and chemical toxicology 2008 v.46 no.9 pp. 3147-3154
ISSN:
0278-6915
Subject:
Chlorella vulgaris; Chlorophyceae; chelation; bone marrow cells; medicinal properties; phytochelatins; antinutritional factors; metabolic detoxification; interleukin-6; lead poisoning; lead; hematopoietic cell growth factors
DOI:
10.1016/j.fct.2008.07.005
PubMed:
18684395

37. In vitro antioxidant activities of water-soluble polysaccharides extracted from Isaria farinosa B05

Author:
Jiang, Y.H.; Jiang, X.L.; Wang, P.; Hu, X.K.
Source:
Journal of food biochemistry 2005 v.29 no.3 pp. 323-335
ISSN:
0145-8884
Subject:
fermentation; redox potential; biosynthesis; free radicals; hydrogen peroxide; lipid peroxidation; Isaria farinosa; polysaccharides; antioxidant activity; chelation; mycelium; culture filtrates; fungi
Abstract:
... The water-soluble exo-polysaccharides (WSEPS) and intrapolysaccharides (WSIPS) were prepared from the fermentation broth and mycelia of Isaria farinosa B05, respectively, and their antioxidant activities in vitro were studied by various antioxidant assays, including hydroxyl radical scavenging, superoxide radical scavenging, hydrogen peroxide (H2O2) scavenging, metal chelating activities, reducing ...
DOI:
10.1111/j.1745-4514.2005.00040.x

38. Inhibition of matrix metalloproteinase-2 activity by siderophores of Pseudomonas species

Author:
Shinozaki, Y.; Akutsu-Shigeno, Y.; Nakajima-Kambe, T.; Inomata, S.; Nomura, N.; Nakahara, T.; Uchiyama, H.
Source:
Applied microbiology and biotechnology 2004 v.64 no.6 pp. 840-847
ISSN:
0175-7598
Subject:
soil bacteria; chelation; enzyme activity; enzyme inhibitors; enzyme inhibition
Abstract:
... To obtain a novel matrix metalloproteinase (MMP) inhibitor produced by bacteria, we have focused on the chelating activity of siderophores. Several siderophore-producing bacteria were isolated from soil using chrome azurol S agar plates and then the effect of siderophores on MMP-2 activity was assayed by gelatin zymography. The results showed that partially purified siderophores from ten isolated ...
DOI:
10.1007/s00253-003-1521-2
PubMed:
14727091

39. Gene networks involved in iron acquisition strategies in plants

Author:
Bauer, Petra; Bereczky, Zsolt
Source:
Agronomy for sustainable development 2003 v.23 no.5-6 pp. 447-454
ISSN:
0249-5627
Subject:
biosynthesis; chelation; crops; grasses; human health; iron; nicotianamine; nicotianamine synthase; nutrient deficiencies; phytosiderophores; regulator genes; tomatoes; transcription (genetics)
Abstract:
... Iron uptake is strictly controlled in all organisms. Iron deficiency induces a well-defined series of physiological events, either based on iron reduction (strategy I, dicots and monots except grasses) or iron chelation (strategy II, grasses). Genes encoding the structural components of the strategies I and II have been described recently using molecular, genetic and biochemical techniques. The ma ...
DOI:
10.1051/agro:2003012

40. Ultralow calcium requirements of fungi facilitate use of calcium regulating agents to suppress host calcium-dependent defenses, synergizing infection by a mycoherbicide

Author:
Gressel, J.; Michaeli, D.; Kampel, V.; Amsellem, Z.; Warshawsky, A.
Source:
Journal of agricultural and food chemistry 2002 v.50 no.22 pp. 6353-6360
ISSN:
0021-8561
Subject:
carbohydrate metabolism; ethylene glycol tetraacetic acid; chelating agents; calcium; Colletotrichum coccodes; verapamil; Abutilon theophrasti; mycoherbicides; oxalic acid; virulence; chelation; inorganic ions
Abstract:
... Infection by many fungi activates a variety of calcium dependent defenses in the hosts, slowing or suppressing the attacker and limiting the efficacy of mycoherbicides. The calcium requirement for fungal growth is so low that it could only be implied based on fungi containing calcium-dependent signaling enzymes. Analytical grade media contain <2 micromolar calcium, and the addition of specific che ...
DOI:
10.1021/jf0201780
PubMed:
12381116

41. Decreased and increased expression of the subunit CHL I diminishes Mg chelatase activity and reduces chlorophyll synthesis in transgenic tobacco plants

Author:
Papenbrock, J.; Pfundel, E.; Mock, H.P.; Grimm, B.
Source:
plant journal 2000 v.22 no.2 pp. 155-164
ISSN:
0960-7412
Subject:
biosynthesis; complementary DNA; antisense DNA; transgenic plants; iron; magnesium; gene expression; biochemical pathways; photosystem II; Nicotiana tabacum; photosystem I; chlorophyll; promoter regions; chelation
Abstract:
... The chelation of Fe2 and Mg2+ ions forms protoheme IX and Mg-protoporphyrin IX, respectively, and the latter is an intermediate in chlorophyll synthesis. Active magnesium protoporphyrin IX chelatase (Mg-chelatase) is an enzyme complex consisting of three different subunits. To investigate the function of the CHL I subunit of Mg-chelatase and the effects of modified Mg-chelatase activity on the tet ...
DOI:
10.1046/j.1365-313x.2000.00724.x
PubMed:
10792831

42. Mg-chelatase of tobacco: identification of a Chl D cDNA sequence encoding a third subunit, analysis of the interaction of the three subunits with the yeast two-hybrid system, and reconstitution of the enzyme activity by co-expression of recombinant CHL D, CHL H and CHL I

Author:
Papenbrock, J.; Grafe, S.; Kruse, E.; Hanel, F.; Grimm, B.
Source:
plant journal 1997 v.12 no.5 pp. 981-990
ISSN:
0960-7412
Subject:
complementary DNA; molecular weight; recombinant proteins; heme; beta-galactosidase; magnesium; gene expression; amino acid sequences; Nicotiana tabacum; nucleotide sequences; reporter genes; enzyme activity; chelation
Abstract:
... Mg-protoporphyrin IX chelatase catalyzes insertion of the magnesium ion into protoporphyrin IX, the last common intermediate precursor in chlorophyll and heme biosynthesis, to form Mg-protoporphyrin IX. In Rhodobacter sphaeroides, and Synechocystis, the three open reading frames bchD/chID, bchH/chIH and bchI/chII encode proteins which are required for in vitro Mg-chelatase activity. In higher plan ...
DOI:
10.1046/j.1365-313X.1997.12050981.x
PubMed:
9418040

43. Molecular localisation of ferrochelatase in higher plant chloroplasts

Author:
Roper, J.M.; Smith, A.G.
Source:
European journal of biochemistry 1997 v.246 no.1 pp. 32-37
ISSN:
0014-2956
Subject:
Arabidopsis; chelation; chlorophyll; iron; magnesium; magnesium chelatase; models; phosphates; proteins; radiolabeling; thylakoids
Abstract:
... Within the chloroplast of higher plants, a crucial branchpoint of the tetrapyrrole synthesis pathway is the chelation of either Fe2+ to make haem, or Mg2+ for chlorophyll, catalysed by ferrochelatase or magnesium chelatase, respectively. One model that has been proposed for the control of this branchpoint, based on biochemical studies, is that the two enzymes are spatially separated within the chl ...
DOI:
10.1111/j.1432-1033.1997.t01-1-00032.x
PubMed:
9210462