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Volatile-mediated killing of Arabidopsis thaliana by bacteria is mainly due to hydrogen cyanide.

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The volatile-mediated impact of bacteria on plant growth is well documented, and contrasting effects have been reported ranging from 6-fold plant promotion to plant killing. However, very little is known about the identity of the compounds responsible for these effects or the mechanisms involved in

Benzyl Cyanide Leads to Auxin-Like Effects Through the Action of Nitrilases in Arabidopsis thaliana.

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Plants within the Brassicales order generate glucosinolate hydrolysis products that can exert different biological effects on several organisms. Here, we evaluated the physiological effects of one of these compounds, benzyl cyanide (phenylacetonitrile), when exogenously applied on Arabidopsis

Comparative transcriptome analysis reveals significant differences in the regulation of gene expression between hydrogen cyanide- and ethylene-treated Arabidopsis thaliana.

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Hydrogen cyanide (HCN) is a small gaseous molecule that is predominantly produced as an equimolar co-product of ethylene (ET) biosynthesis in plants. The function of ET is of great concern and is well studied; however, the function of HCN is largely unknown. Similar to ET, HCN is a

Quinclorac resistance in Echinochloa phyllopogon is associated with reduced ethylene synthesis rather than enhanced cyanide detoxification by β-cyanoalanine synthase.

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Multiple herbicide resistant Echinochloa phyllopogon exhibits resistance to the auxin herbicide quinclorac. Previous research observed enhanced activity of the cyanide-detoxifying enzyme β-cyanoalanine synthase (β-CAS) and reduced ethylene production in the resistant line, suggesting

Chemically induced virus resistance in Arabidopsis thaliana is independent of pathogenesis-related protein expression and the NPR1 gene.

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Salicylic acid (SA) treatment triggers inhibition of replication or movement of several positive-sense RNA plant viruses in tobacco. This resistance can also be stimulated by nonlethal concentrations of cyanide and antimycin A (AA) without triggering induction of pathogenesis-related PR-1 protein

cDNA clones encoding Arabidopsis thaliana and Zea mays mitochondrial chaperonin HSP60 and gene expression during seed germination and heat shock.

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Mitochondria contain a nuclear-encoded heat shock protein, HSP60, which functions as a chaperonin in the post-translational assembly of multimeric proteins encoded by both nuclear and mitochondrial genes. We have isolated and sequenced full-length complementary DNAs coding for this mitochondrial

Cyanide in the chemical arsenal of garlic mustard, Alliaria petiolata.

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Cyanide production has been reported from over 2500 plant species, including some members of the Brassicaceae. We report that the important invasive plant, Alliaria petiolata, produces levels of cyanide in its tissues that can reach 100 ppm fresh weight (FW), a level considered toxic to many

Chemical induction of rapid and reversible plastid filamentation in Arabidopsis thaliana roots.

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Plastids assume various morphologies depending on their developmental status, but the basis for developmentally regulated plastid morphogenesis is poorly understood. Chemical induction of alterations in plastid morphology would be a useful tool for studying this; however, no such chemicals have been

Identification of Alternaria brassicicola genes expressed in planta during pathogenesis of Arabidopsis thaliana.

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Alternaria brassicicola is a necrotrophic fungal pathogen that causes black spot disease on cruciferous plants including economically important Brassica species. The purpose of this study was to identify fungal genes expressed during infection of Arabidopsis. In order to identify candidate genes

Solution structure of a single-domain thiosulfate sulfurtransferase from Arabidopsis thaliana.

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We describe the three-dimensional structure of the product of Arabidopsis thaliana gene At5g66040.1 as determined by NMR spectroscopy. This protein is categorized as single-domain sulfurtransferase and is annotated as a senescence-associated protein (sen1-like protein) and ketoconazole resistance

Characterization of two sulfurtransferase isozymes from Arabidopsis thaliana.

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Sulfurtransferases transfer a sulfane atom from a donor substrate to a thiophilic acceptor molecule. Recently a sulfurtransferase specific for the substrate 3-mercaptopyruvate was isolated from Arabidopsis thaliana [Papenbrock, J. & Schmidt, A. (2000) Eur. J. Biochem. 267, 145-154]. In this study a

Altered levels of AOX1a expression result in changes in metabolic pathways in Arabidopsis thaliana plants acclimated to low dose rates of ultraviolet B radiation.

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UV-B is a damaging component of solar radiation that inevitably reaches the Earth's surface. Plants have developed response mechanisms to adapt to UVB exposure. The alternative oxidase (AOX) catalyzes the ATP-uncoupling cyanide-resistant alternative pathway (AP) in plant mitochondria and is thought

Characterization of a sulfurtransferase from Arabidopsis thaliana.

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A database search for similarities between sequenced parts of the Arabidopsis thaliana genome with known sulfurtransferase sequences from Escherichia coli and mammals was undertaken to obtain information about plant sulfurtransferase-like proteins. One gene and several homologous EST clones were

A QM/MM study of the reaction mechanism of (R)-hydroxynitrile lyases from Arabidopsis thaliana (AtHNL).

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Hydroxynitrile lyases (HNLs) catalyze the conversion of chiral cyanohydrins to hydrocyanic acid (HCN) and aldehyde or ketone. Hydroxynitrile lyase from Arabidopsis thaliana (AtHNL) is the first R-selective HNL enzyme containing an α/β-hydrolases fold. In this article, the catalytic mechanism of

Arabidopsis sulfurtransferases: investigation of their function during senescence and in cyanide detoxification.

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Sulfurtransferases (STs) and beta-cyano- l-alanine synthase (CAS) are suggested to be involved in cyanide detoxification. Therefore, the accumulation of ST1 and CAS RNAs, and the ST and CAS protein levels and enzyme activities were determined in Arabidopsis thaliana Heynh. plants grown under

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