C. Jacyn Baker

Florida Department of Agriculture and Consumer Services

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Norton M. Mock

United States Department of Agriculture

Andrey A. Aver‘yanov

Russian Research Institute for Phytopathology

Kenneth L. Deahl

Agricultural Research Service

Elizabeth W. Orlandi

Pennsylvania State University

Daniel P. Roberts

Beltsville Agricultural Research Center

Bruce D. Whitaker

Beltsville Agricultural Research Center

V. P. Lapikova

Russian Research Institute for Phytopathology

T. D. Pasechnik

Russian Research Institute for Phytopathology

Merelee M. Atkinson

University of Wisconsin–Madison

Robert A. Owens

Beltsville Agricultural Research Center

Cooperative Institutions

United States Department of Agriculture

Agricultural Research Service

Beltsville Agricultural Research Center

Plant (United States)

University of Florida

University of Maryland, College Park

University of Wisconsin–Madison

Southwest Florida Research

U.S. Vegetable Laboratory

Pennsylvania State University

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An improved method for monitoring cell death in cell suspension and leaf disc assays using evans blue

Plant Cell Tissue and Organ Culture (PCTOC) (1994)

C. Jacyn Baker Norton M. Mock

Pseudomonas syringae

Stain

Viability assay

Evans Blue

Suspension culture

Cell counting

Vital stain

10.1007/bf00037585

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Citations (549)

Detection of bacterial aggregation in tobacco cell suspensions treated with pathogenic bacteria

Physiological and Molecular Plant Pathology (2011)

C. Jacyn Baker Norton M. Mock Elizabeth W. Orlandi Kenneth L. Deahl Robert A. Owens

Pseudomonas syringae

Pseudomonas fluorescens

Pseudomonas putida

Pathogenic bacteria

10.1016/j.pmpp.2011.03.001

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Citations (2)

Scavenging of H2O2 and Production of Oxygen by Horseradish Peroxidase

Archives of Biochemistry and Biophysics (2000)

C. Jacyn Baker Kenneth L. Deahl John M. Domek Elizabeth W. Orlandi

Horseradish peroxidase

Absorbance

10.1006/abbi.2000.2013

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Citations (49)

Separation of unsaturated fungal fatty acid methyl esters by reversed-phase liquid chromatography for further evaluation by gas chromatography

Journal of Chromatography A (1984)

C. Jacyn Baker J. H. Melhuish

Aqueous normal-phase chromatography

10.1016/s0021-9673(01)87824-9

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Citations (6)

Chemical Characterization of the Lipopolysaccharide of Pseudomonas solanacearum

Applied and Environmental Microbiology (1984)

C. Jacyn Baker Martin J. Neilson Luis Sequeira Kenneth Keegstra

The carbohydrates present in lipopolysaccharide (LPS) from Pseudomonas solanacearum are rhamnose, xylose, 2-amino-2-deoxyglucose, glucose, heptose, and 2-keto-3-deoxyoctonate. LPS extracted from cultures grown on either glycerol or glucose (as the major source of carbon) and extracted after various incubation periods had similar compositions. The LPS from several strains of the bacterium contained the same component sugars, but the amounts of each sugar varied considerably. It was observed, however, that xylose and 2-amino-2-deoxyglucose increased proportionately with rhamnose, the major component. Phenol-water-extracted LPS contained measurable amounts of nucleic acid, protein, and arabinan, but none of these polymers were detected in LPS extracted with phenol-chloroform-petroleum ether. Polysaccharides liberated from LPS by mild acid hydrolysis were purified by gel filtration. Carbohydrate analysis of the LPS from a virulent, fluidal strain (K60) showed that the O-specific antigen consisted of rhamnose, xylose, and 2-amino-2-deoxyglucose in the proportions 4:1:1. The LPS of an avirulent, afluidal strain (B1) lacked the O-specific antigen; the R-core region consisted of rhamnose, glucose, heptose, and 2-keto-3-deoxyoctonate. Methylation analysis indicated that the K60 O-specific antigen was composed of a hexasaccharide repeating unit containing 3-, 2-, and 3,4-substituted rhamnopyranosyl residues, 3-substituted 2-amino-2-deoxyglucose, and terminal xylopyranose in the molar ratios 2:1:1:1:1.

Rhamnose

Heptose

Monosaccharide

10.1128/aem.47.5.1096-1100.1984

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Citations (21)

Possible contribution of blast spores to the oxidative burst in the infection droplet on rice leaf

Acta Phytopathologica et Entomologica Hungarica (2007)

Andrey A. Aver‘yanov T. D. Pasechnik V. P. Lapikova L. A. Gaivoronskaya В.С. Кузнецов

The infection-induced overproduction of reactive oxygen species (ROS) in resistant plants is usually ascribed to the host. Here we tested the possible contribution of the parasite, the rice blast fungus to ROS production. Droplets of spore suspensions or water were kept on rice leaves or on a plastic. After one day, superoxide radical and hydrogen peroxide were chemically assayed in drop diffusates. Similar measurements were done on diffusates of rice calli submerged in spore suspension or water. Negligible amounts of ROS were found in diffusates of plant tissues treated with water. In contrast, diffusates from tissues treated with spore suspensions had appreciable levels of ROS, usually higher in incompatible combinations than in compatible ones. However, diffusates of spores incubated on plastic produced ROS to an extent comparable to those of infected tissues. In diffusates of spores, O 2− was found after their germination, and H 2 O 2 was found after appressorium formation. Various fungal strains differed in ROS production. The results suggest that spores of the blast inoculum may contribute significantly to ROS production on rice leaves, at least, at early stages of the disease. This might be a factor of incompatibility suppressing a parasite and/or inducing defense responses of a host.

10.1556/aphyt.42.2007.2.13

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Citations (9)

The determination of sulphuric acid in air: A specific method

Microchimica Acta (1969)

Lena Dubois C. Jacyn Baker T. Teichman A. Zdrojewski J. L. Monkman

Sodium hydroxide

Barium hydroxide

Perchlorate

Matrix (chemical analysis)

Barium

10.1007/bf01224090