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octadecatrienoic acid/solanum tuberosum
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8 risultati
Differential formation of octadecadienoic acid and octadecatrienoic acid products in control and injured/infected potato tubers.
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Lipoxygenases in plants have been implicated in the activation of defense responses against injury/infection. Pathogen-derived polyunsaturated fatty acids, such as arachidonic acid, eicosapentaenoic acid and their metabolites have been shown to elicit defense responses against pathogen infection in
Inactivation of potato lipoxygenase by hydroperoxy acids as suicide substrates.
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The preincubation of potato lipoxygenase with 9(S)-hydroperoxyoctadecatrienoic acid, 15(S)-hydroperoxyeicosatetraenoic acid or 5(S)-hydroperoxyeicosatetraenoic acid which can be subjected to further lipoxygenation led to the gradual inactivation of the lipoxygenase activity, whereas
Double hydroperoxidation of alpha-linolenic acid by potato tuber lipoxygenase.
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The potato tuber lipoxygenase preparations convert alpha-linolenic acid not only to 9(S)-HPOTE, but also to some more polar metabolites. Two of these polar products, I and II, with ultraviolet absorbance maxima at 267 nm were purified by HPLC. It was found that metabolites I and II have,
Cloning and characterization of a theta class glutathione transferase from the potato pathogen Phytophthora infestans.
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A glutathione transferase (GST) related to the theta (T) class of enzymes found in plants and animals has been cloned from the potato pathogen Phytophthora infestans. The cDNA encoded a 25kDa polypeptide termed PiGSTT1 which was expressed in E. coli as the native protein. The purified recombinant
Molecular cloning, functional expression, and tissue distribution of a potato sprout allene oxide synthase involved in a 9-lipoxygenase pathway.
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Potato (Solanum tuberosum) plants are rich in 9-lipoxygenase, which converts linoleic acid and alpha-linolenic acid to 9S-hydroperoxy-10E,12Z-octadecadienoic acid (9-HPOD) and 9S-hydroperoxy-10E,12Z,15Z-octadecatrienoic acid (9-HPOT) respectively. The allene oxide synthase (AOS) involved in
Changes in oxylipin synthesis after Phytophthora infestans infection of potato leaves do not correlate with resistance.
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Oxylipins constitute a class of molecules notably involved in host-pathogen interactions. In the potato-Phytophthora infestans (Mont.) De Barry (P. infestans) relationships, the role of colneleic and colnelenic acids, two oxylipins resulting from the consecutive action of lipoxygenase (EC
Isolation and structures of two divinyl ether fatty acids from Clematis vitalba.
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[1-14C]Linolenic acid was incubated with a homogenate of leaves of Clematis vitalba, a plant belonging to the Ranunculaceae family. Analysis of the reaction product by reversed-phase high-performance liquid radiochromatography demonstrated the presence of the following labeled oxylipins: 12-oxo-10,
Allene oxide cyclase: a new enzyme in plant lipid metabolism.
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The mechanism of the biosynthesis of 12-oxo-10,15(Z)-phytodienoic acid (12-oxo-PDA) from 13(S)-hydroperoxy-9(Z),11(E),15(Z)-octadecatrienoic acid in preparations of corn (Zea mays L.) was studied. In the initial reaction the hydroperoxide was converted into an unstable allene oxide,
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