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linolenic acid/nicotiana
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Characterization of transgenic tobacco with an increased alpha-linolenic acid level
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Microsomal omega-3 fatty acid desaturase catalyzes the conversion of 18:2 (linoleic acid) to 18:3 (alpha-linolenic acid) in phospholipids, which are the main constituents of extrachloroplast membranes. Transgenic tobacco (Nicotiana tabacum) plants with increased 18:3 contents (designated SIIn
Enhancement of α-linolenic acid content in transgenic tobacco seeds by targeting a plastidial ω-3 fatty acid desaturase (fad7) gene of Sesamum indicum to ER.
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CONCLUSIONS
Expression of sesame plastidial FAD7 desaturase modified with the endoplasmic reticulum targeting and retention signals, enhances the α-linolenic acid accumulation in seeds of Nicotiana tabacum. In plants, plastidial ω-3 fatty acid desaturase-7 (FAD7) catalyzes the formation of C16 and
[Expression of Mortierella isabellina delta6-fatty acid desaturase gene in gamma-linolenic acid production in transgenic tobacco].
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Gamma-linolenic acid (GLA, C18:3delta6.9.12) is nutritional and important polyunsaturated fatty acid in human and animal diets. GLA play an important role in hormone regulation and fatty acid metabolization. Furthermore it is also the biological precursor of a group of molecules, including
Transcriptomics assisted proteomic analysis of Nicotiana occidentalis infected by Candidatus Phytoplasma mali strain AT.
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Phytoplasmas are pathogenic bacteria within the class of Mollicutes, which are associated with more than 1000 plant diseases. In this study, we applied quantitative mass spectrometry to analyse affected pathways of the model plant tobacco (Nicotiana occidentalis) upon Candidatus Phytoplasma mali
New insights into the early biochemical activation of jasmonic acid biosynthesis in leaves.
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In plants, herbivore attack elicits the rapid accumulation of jasmonic acid (JA) which results from the activation of constitutively expressed biosynthetic enzymes. The molecular mechanisms controlling the activation of JA biosynthesis remain largely unknown however new research has elucidated some
A simple and efficient system for green note compound biogenesis by use of certain lipoxygenase and hydroperoxide lyase sources.
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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
Lipoxygenase gene expression in the tobacco-Phytophthora parasitica nicotianae interaction.
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A recently isolated cDNA clone of tobacco (Nicotiana tabacum L.) lipoxygenase (LOX) was used to study LOX gene expression in tobacco cell-suspension cultures and intact plants in response to infection with Phytophthora parasitica nicotianae (Ppn). Southern blot analysis of tobacco DNA indicated that
Two low-temperature-inducible Chlorella genes for delta12 and omega-3 fatty acid desaturase (FAD): isolation of delta12 and omega-3 fad cDNA clones, expression of delta12 fad in Saccharomyces cerevisiae, and expression of omega-3 fad in Nicotiana tabacum.
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In an attempt to clarify the involvement of fatty acid desaturases (FADs) in the freezing tolerance of Chlorella vulgaris IAM C-27, developed by hardening, we have isolated cDNA clones for two types of FADs from the Chlorella strain, based on the sequence information of genes for delta12 and omega-3
Fatty-acid composition and biosynthesis in cell suspension cultures of Glycine max (L.) Merr., Catharanthus roseus G. Don and Nicotiana tabacum L.
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The fatty-acid composition of C. roseus and N. tabacum cell suspension cultures was unaffected by subculture on Wood and Braun, Murashige and Skoog, or Gamborg B5C media. However, placing the cultures - which were normally grown at 25° C - at 15° C reduced growth but resulted in enhanced formation
Transgenic production of epoxy fatty acids by expression of a cytochrome P450 enzyme from Euphorbia lagascae seed.
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Seed oils of a number of Asteraceae and Euphorbiaceae species are enriched in 12-epoxyoctadeca-cis-9-enoic acid (vernolic acid), an unusual 18-carbon Delta(12)-epoxy fatty acid with potential industrial value. It has been previously demonstrated that the epoxy group of vernolic acid is synthesized
Fatty Acid composition in tobacco I. Green tobacco plants.
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The major fatty acids (16 and 18 carbons) in leaves, flowers, and seeds of Nicotiana tabacum L. cv. Catterton have been analyzed at various intervals during the growth period. From the pattern of their accumulation and relative distribution, it was found that A) the amount of fatty acids in upper
Role of Jasmonates in the Elicitor- and Wound-Inducible Expression of Defense Genes in Parsley and Transgenic Tobacco.
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Jasmonates have been proposed to be signaling intermediates in the wound and/or elicitor-activated expression of plant defense genes. We used parsley (Petroselinum crispum) cell cultures and transgenic tobacco (Nicotiana tabacum) plants expressing 4CL1-GUS gene fusions to investigate the potential
The CYP74B and CYP74D divinyl ether synthases possess a side hydroperoxide lyase and epoxyalcohol synthase activities that are enhanced by the site-directed mutagenesis
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The CYP74 family of cytochromes P450 includes four enzymes of fatty acid hydroperoxide metabolism: allene oxide synthase (AOS), hydroperoxide lyase (HPL), divinyl ether synthase (DES), and epoxyalcohol synthase (EAS). The present work is concerned with catalytic specificities of three recombinant
State of the lipid and fatty acid composition in chloroplasts of Nicotiana tabacum under the influence of an increased CO2 partial pressure of 700 p.p.m.
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We analysed chloroplast lipids of Nicotiana tabacum var. John William's Broadleaf, cultivated under an increased PCO(2) of 700 p.p.m. Glycolipids and phospholipids remain constant under these conditions, whereas the carotenoid content undergoes a quantitative change. The saturation degree of fatty
Comparative immunological and chemical analysis of lipids and carotenoids of the D1-peptide and of the light-harvesting-complex of photosystem II of Nicotiana tabacum.
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The light-harvesting-complex (LHCP) was isolated from photosystem II of Nicotiana tabacum var. John William's Broadleaf by means of the detergent acetyl-beta-D-glucopyranoside and fractionating centrifugation. The D1-peptide of photosystem II was isolated as a dimer with the molecular mass of 66 kDa
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