hexenal/nicotiana

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11 torthaí

Identification and Characterization of (3Z):(2E)-Hexenal Isomerases from Cucumber.

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Logáil Isteach / Cláraigh

E-2-hexenal is a volatile compound that is commonly emitted by wounded or stressed plants. It belongs to the group of so-called green leaf volatiles (GLVs), which play an important role in transferring information to plants and insects. While most biosynthetic enzymes upstream of E-2-hexenal have

A simple and efficient system for green note compound biogenesis by use of certain lipoxygenase and hydroperoxide lyase sources.

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Logáil Isteach / Cláraigh

Six-carbon (C(6)) aldehydes and alcohols are important components of the aroma and flavor of fruits and vegetables. Soybean lipoxygenase (LOX) isozyme LOX 3 was reported not only to produce less 13-hydroperoxides, precursors of C(6) aldehydes, but also to convert them to ketodiene products. Here, we

The involvement of lipid peroxide-derived aldehydes in aluminum toxicity of tobacco roots.

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Logáil Isteach / Cláraigh

Oxidative injury of the root elongation zone is a primary event in aluminum (Al) toxicity in plants, but the injuring species remain unidentified. We verified the hypothesis that lipid peroxide-derived aldehydes, especially highly electrophilic alpha,beta-unsaturated aldehydes (2-alkenals),

Watermelon (Citrullus lanatus) hydroperoxide lyase greatly increases C6 aldehyde formation in transgenic leaves.

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Logáil Isteach / Cláraigh

Fatty acid hydroperoxide lyase (HL) is the key enzyme for the production of the "green note"compounds, leaf aldehyde [(2E)-hexenal] and leaf alcohol [(3Z)-hexenol], in plant tissues. A cDNA encoding HL was cloned from leaves of watermelon (Citrullus lanatus) and expressed in Nicotiana tabacum. The

Expression of cucumber lipid-body lipoxygenase in transgenic tobacco: lipid-body lipoxygenase is correctly targeted to seed lipid bodies.

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Logáil Isteach / Cláraigh

A particular isoform of lipoxygenase (LOX, EC 1.13.11.12) localized on lipid bodies has been shown by earlier investigations to play a role during seed germination in initiating the mobilization of triacylglycerols. On lipid bodies of germinating cucumber (Cucumis sativus L.) seedlings, the

Overexpression of hydroperoxide lyase gene in Nicotiana benthamiana using a viral vector system.

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Logáil Isteach / Cláraigh

13-Lipoxygenase (13-LOX) and 13-hydroperoxide lyases (13-HPL) are the key enzymes for the production of the 'green note' compounds hexanal, (3Z)- and (2E)-hexenal in plant tissues. To produce high levels of 13-LOX and 13-HPL enzymatic activities for a biocatalytic process to generate C(6)-aldehydes

Role of pathogen-induced volatiles in the Nicotiana tabacum-Golovinomyces cichoracearum interaction.

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Logáil Isteach / Cláraigh

Plant injuries activate signal transduction cascades mediated by the plant hormones, which lead to enhanced expression of defence related genes and/or to changes in the emission of volatile organic compounds that can act as semiochemicals. In this research we demostrated that infection with the

Identification of a specific isoform of tomato lipoxygenase (TomloxC) involved in the generation of fatty acid-derived flavor compounds.

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Logáil Isteach / Cláraigh

There are at least five lipoxygenases (TomloxA, TomloxB, TomloxC, TomloxD, and TomloxE) present in tomato (Lycopersicon esculentum Mill.) fruit, but their role in generation of fruit flavor volatiles has been unclear. To assess the physiological role of TomloxC in the generation of volatile C6

Lethal heat stress-dependent volatile emissions from tobacco leaves: what happens beyond the thermal edge?

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Logáil Isteach / Cláraigh

Natural vegetation is predicted to suffer from extreme heat events as a result of global warming. In this study, we focused on the immediate response to heat stress. Photosynthesis and volatile emissions were measured in the leaves of tobacco (Nicotiana tabacum cv. Wisconsin 38) after exposure to

Adducts of oxylipin electrophiles to glutathione reflect a 13 specificity of the downstream lipoxygenase pathway in the tobacco hypersensitive response.

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Logáil Isteach / Cláraigh

The response to reactive electrophile species (RES) is now considered as part of the plant response to pathogen and insect attacks. Thanks to a previously established high-performance liquid chromatography tandem mass spectrometry methodology, we have investigated the production of oxylipin RES

Caterpillar-elicited methanol emission: a new signal in plant-herbivore interactions?

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Logáil Isteach / Cláraigh

Plants release into the atmosphere large quantities of volatile organic compounds (VOCs), of which methanol (MeOH), a putative waste product, is the second most abundant. Using online proton-transfer-reaction mass spectrometry (PTR-MS), we demonstrate that when Manduca sexta larvae attack Nicotiana

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