Search Results - "Steffens, J.C"

Increasing resistance of tomato to lepidopteran insects by overexpression of polyphenol oxidase by Thipyapong, P, Mahanil, S, Bhonwong, A, Attajarusit, J, Stout, M.J, Steffens, J.C

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Antisense downregulation of polyphenol oxidase results in enhanced disease susceptibility by Thipyapong, P, Hunt, M.D, Steffens, J.C

“…Polyphenol oxidases (PPOs; EC 1.14.18.1 or EC 1.10.3.2) catalyze the oxidation of phenolics to quinones, highly reactive intermediates whose secondary…”
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1-O-Acyl-β-D-Glucoses as Fatty Acid Donors in Transacylation Reactions by Ghangas, G.S., Steffens, J.C.

“…Glandular trichome exudates of the wild tomato, Lycopersicon pennellii Corr. (D′Arcy), are composed of 2,3,4-tri-O-acylglucoses possessing short to medium…”
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Branched chain amino acid metabolism in the biosynthesis of Lycopersicon pennellii glucose esters by Walters, D.S. (Cornell University, Ithaca, NY), Steffens, J.C

“…Lycopersicon pennellii Corr. (D'Arcy) an insect-resistant, wild tomato possesses high densities of glandular trichomes which exude a mixture of…”
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Suppression of polyphenol oxidases increases stress tolerance in tomato by Thipyapong, Piyada, Melkonian, Jeffrey, Wolfe, David W, Steffens, John C

“…Polyphenol oxidases (PPOs) have been proposed to function in the Mehler reaction, photoreduction of molecular oxygen by PSI [Physiol. Plant.72 (1988) 659]…”
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Association of epicuticular sugars with aphid resistance in hybrids with wild tomato by Goffreda, J.C. (Rutgers Univ., New Brunswick, NJ), Steffens, J.C, Mutschler, M.A

“…Behavioral studies have shown that aphid resistance in Lycopersicon pennelli (Corr.) D'Arcy is due to the presence of sugar esters in glandular exudate of the…”
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Tomato polyphenol oxidase. Differential response of the polyphenol oxidase F promoter to injuries and wound signals by Thipyapong, P, Steffens, J.C

“…Tomato (Lycopersicon esculentum Mill.) polyphenol oxidases (PPOs) are encoded by a seven-member gene family that exhibits complex patterns of differential…”
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Bio-fermentation of modified flavonoids: an example of in vivo diversification of secondary metabolites by Willits, M.G, Giovanni, M, Prata, R.T.N, Kramer, C.M, Luca, V. de, Steffens, J.C, Graser, G

“…A bio-fermentation technique was used for the in vivo diversification of flavonoid structures based on expression in Escherichia coli of six…”
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Utilization of the Genetic Resources of Wild Species To Create a Nontransgenic High Flavonoid Tomato by Willits, Michael G, Kramer, Catherine M, Prata, Rogerio T. N, De Luca, Vincenzo, Potter, Brian G, Steffens, John C, Graser, Gerson

“…Flavonoids represent a large and important group of plant natural products that are ubiquitous in the plant kingdom. Epidemiological studies have shown the…”
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Cloning and regiospecificity studies of two flavonoid glucosyltransferases from Allium cepa by Kramer, Catherine M., Prata, Rogerio T.N., Willits, Michael G., De Luca, Vincenzo, Steffens, John C., Graser, Gerson

“…Two UDP-glucose-dependent flavonoid glucosyltransferases (EC 2.4.1.-) isolated from the epidermal layer of yellow onion ( Allium cepa) were functionally…”
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Differential expression and turnover of the tomato polyphenol oxidase gene family during vegetative and reproductive development by Thipyapong, P. (Cornell University, Ithaca, NY.), Joel, D.M, Steffens, J.C

“…Polyphenol oxidases (PPOs) are encoded by a highly conserved, seven-member gene family clustered within a 165-kb locus on chromosome 8 of tomato (Lycopersicon…”
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Purification and properties of a novel chloroplast stromal peptidase: processing of polyphenol oxidase and other imported precursors by Koussevitzky, S. (Hebrew University, Jerusalem, Israel.), Ne'eman, E, Sommer, A, Steffens, J.C, Harel, E

“…Polyphenol oxidases (PPOs) are nuclear-encoded chloroplast proteins that are targeted to the thylakoid lumen by a bipartite presequence. The N-terminal part of…”
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Glucose polyester biosynthesis. Purification and characterization of a glucose acyltransferase by Li, A.X, Eannetta, N, Ghangas, G.S, Steffens, J.C

“…Glandular trichomes of the wild tomato species Lycopersicon pennellii secrete 2,3,4-O-tri-acyl-glucose (-Glc), which contributes to insect resistance. A Glc…”
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Import, targeting, and processing of a plant polyphenol oxidase by Sommer, A. (The Hebrew University, Jerusalem, Israel), Ne'eman, E, Steffens, J.C, Mayer, A.M, Harel, E

“…A tomato (Lycopersicon esculentum L.) gene encoding a precursor of polyphenol oxidase (PPO) was transcribed and translated in vitro. The import, targeting, and…”
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Differential production of thaxtomins by pathogenic Streptomyces species in vitro by Loria, R. (Cornell University, Ithaca, NY.), Bukhalid, R.A, Creath, R.A, Leiner, R.H, Olivier, M, Steffens, J.C

“…Streptomyces scabies and S. acidiscabies, causal agents of potato scab, produced the phytotoxin thaxtomin A and, to a lesser extent, other thaxtomins in…”
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Overexpression of a bacterial branched-chain α-keto acid dehydrogenase complex in Arabidopsis results in accumulation of branched-chain acyl-CoAs and alteration of free amino acid composition in seeds by Li, Li, Thipyapong, Piyada, Breeden, David C, Steffens, John C

“…Branched-chain α-keto acid dehydrogenase complex (BCKDC) is a multienzyme complex that plays an important role in branched-chain amino acid catabolism. It…”
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Characterization of the level, target sites and inheritance of cytosine methylation in tomato nuclear DNA by Messeguer, R. (Cornell Univ., Ithaca, NY (USA). Dept. of Plant Breeding and Biometry), Ganal, M.W, Steffens, J.C, Tanksley, S.D

“…The tomato nuclear genome was determined to have a G + C content of 37% which is among the lowest reported for any plant species. Non-coding regions have a G +…”
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Organisation of the tomato polyphenol oxidase gene family by NEWMAN, S. M, EANNETTA, N. T, HAIFENG YU, PRINCE, J. P, DE VICNETE, M. C, TANKSLEY, S. D, STEFFENS, J. C

“…We report the isolation and characterization of seven nuclear genes encoding polyphenol oxidase (PPO) in tomato (Lycopersicon esculentum cv. VFNT Cherry). The…”
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Identification of QTLs controlling acylsugar fatty acid composition in an intraspecific population of Lycopersicon pennellii (Corr.) D'Arcy by Blauth, S.L, Steffens, J.C, Churchill, G.A, Mutschler, M.A

“…Acylsugars exuded by type IV glandular trichomes are responsible for insect resistances found in many Lycopersicon pennellii accessions. Acylsugars are complex…”
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Regulation of triacylglucose fatty acid composition. Uridine diphosphate glucose:fatty acid glucosyltransferases with overlapping chain-length specificity by Kuai, J.P, Ghangas, G.S, Steffens, J.C

“…UDP-glucose (UDP-Glc):fatty acid glucosyltransferases catalyze the UDP-Glc-dependent activation of fatty acids as 1-O-acyl-beta-glucoses…”
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