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phospholipid/tobak
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Autophagy is not a main contributor to the degradation of phospholipids in tobacco cells cultured under sucrose starvation conditions.
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Net degradation of cellular components occurs in plant cells cultured under starvation conditions, and autophagy contributes to the degradation of intracellular proteins. In this study, we investigated the degradation of membrane phospholipids by autophagy in cultured tobacco (Nicotiana tabacum)
Tomato phospholipid hydroperoxide glutathione peroxidase inhibits cell death induced by Bax and oxidative stresses in yeast and plants.
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Using a conditional life or death screen in yeast, we have isolated a tomato (Lycopersicon esculentum) gene encoding a phospholipid hydroperoxide glutathione peroxidase (LePHGPx). The protein displayed reduced glutathione-dependent phospholipid hydroperoxide peroxidase activity, but differs from
Degradation of membrane phospholipids in plant cells cultured in sucrose-free medium.
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It has been generally accepted that autophagy contributes to the degradation of cellular components under nutrient starvation conditions. In a previous study, however, we showed that the degradation of membrane phospholipids occurs mainly by mechanisms distinct from autophagy in suspension-cultured
Calcium-dependent phospholipid-binding proteins in plants : Their characterisation and potential for regulating cell growth.
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There is evidence that Ca(2+) can regulate vesicle-mediated secretion in plant cells, but the mechanism for this is not known. One possibility is that Ca(2+) -dependent phospholipid-binding proteins (annexins) couple the Ca(2+) stimulus to the exocytotic response. Using a protocol developed for the
Cloning and expression of a wheat (Triticum aestivum L.) phosphatidylserine synthase cDNA. Overexpression in plants alters the composition of phospholipids.
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We describe the cloning of a wheat cDNA (TaPSS1) that encodes a phosphatidylserine synthase (PSS) and provides the first strong evidence for the existence of this enzyme in a higher eukaryotic cell. The cDNA was isolated on its ability to confer increased resistance to aluminum toxicity when
Host Pah1p phosphatidate phosphatase limits viral replication by regulating phospholipid synthesis.
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Replication of positive-strand RNA viruses [(+)RNA viruses] takes place in membrane-bound viral replication complexes (VRCs). Formation of VRCs requires virus-mediated manipulation of cellular lipid synthesis. Here, we report significantly enhanced brome mosaic virus (BMV) replication and much
The SEC14 phospholipid transfer protein regulates pathogen-associated molecular pattern-triggered immunity in Nicotiana benthamiana.
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We previously revealed that the SEC14 phospholipid transfer protein from Nicotiana benthamiana (NbSEC14) has a role in plant immune responses against phytopathogenic bacteria in a hypersensitive response-independent manner. To characterize the role of NbSEC14 on plant immunity, we analyzed the
Modification of the fatty acid composition of phospholipids during the hypersensitive reaction in tobacco.
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When Nicotiana tabacum cv. Xanthi nc. plants were inoculated with tobacco mosaic virus (TMV), grown at 33 degrees for 6 days, then transferred to 25 degrees C to induce necrotic reaction, a rapid saturation of microsomal phospholipid-bound fatty acids was observed. Lipoxygenase activity increased to
SEC14 phospholipid transfer protein is involved in lipid signaling-mediated plant immune responses in Nicotiana benthamiana.
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We previously identified a gene related to the SEC14-gene phospholipid transfer protein superfamily that is induced in Nicotiana benthamiana (NbSEC14) in response to infection with Ralstonia solanacearum. We here report that NbSEC14 plays a role in plant immune responses via phospholipid-turnover.
Arabidopsis 3-ketoacyl-coenzyme a synthase9 is involved in the synthesis of tetracosanoic acids as precursors of cuticular waxes, suberins, sphingolipids, and phospholipids.
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Very-long-chain fatty acids (VLCFAs) with chain lengths from 20 to 34 carbons are involved in diverse biological functions such as membrane constituents, a surface barrier, and seed storage compounds. The first step in VLCFA biosynthesis is the condensation of two carbons to an acyl-coenzyme A,
Osmotically induced cell swelling versus cell shrinking elicits specific changes in phospholipid signals in tobacco pollen tubes.
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Pollen tube cell volume changes rapidly in response to perturbation of the extracellular osmotic potential. This report shows that specific phospholipid signals are differentially stimulated or attenuated during osmotic perturbations. Hypo-osmotic stress induces rapid increases in phosphatidic acid
A novel Sec14 phospholipid transfer protein from Nicotiana benthamiana is up-regulated in response to Ralstonia solanacearum infection, pathogen associated molecular patterns and effector molecules and involved in plant immunity.
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To elucidate the molecular mechanisms of plant immune responses, we isolated genes whose expression was regulated by inoculation with Ralstonia solanacearum. Here, we report the characterization of Nicotiana benthamiana belonging to the SEC14-gene superfamily designated as Nicotiana benthamiana
Increased endocytosis of fluorescent phospholipid in tobacco pollen in microgravity and inhibition by verapamil.
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Gravity sensing in plants occurs in specialised tissues, like in the columella in root tips or the endodermis in shoots. Generally, dense organelles, acting as statoliths, are thought to interact with the cytosekeleton and ion channels in gravitropism. We examined the possibility that tobacco pollen
Characterization of filament-forming CTP synthases from Arabidopsis thaliana.
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Cytidine triphosphate (CTP) is essential for DNA, RNA and phospholipid biosynthesis. De novo synthesis is catalyzed by CTP synthases (CTPS). Arabidopsis encodes five CTPS isoforms that unanimously share conserved motifs found across kingdoms, suggesting all five are functional enzymes. Whereas
Inhibition of phospholipase D alpha by N-acylethanolamines.
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N-Acylethanolamines (NAEs) are endogenous lipids in plants produced from the phospholipid precursor, N-acylphosphatidylethanolamine, by phospholipase D (PLD). Here, we show that seven types of plant NAEs differing in acyl chain length and degree of unsaturation were potent inhibitors of the
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