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10 resultados
Protein synthesis in germinating pollen of Petunia: role of proline.
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Pollen of Petunia hybrida was germinated in artificial medium. At the beginning of the incubation, a large amount of proline, which comprises about half of the total free amino acid pool, was released into the medium. Part of this proline is reutilized by the pollen. Uptake of radioactive amino
Effects of free proline accumulation in petunias under drought stress.
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Petunias (Petunia hybrida cv. 'Mitchell') accumulate free proline (Pro) under drought-stress conditions. It is therefore believed that Pro acts as an osmoprotectant in plants subjected to drought conditions. Petunia plants were transformed by Delta(1)-pyrroline-5-carboxylate synthetase genes (AtP5CS
HD-AGPs as Speciation Genes: Positive Selection on a Proline-Rich Domain in Non-Hybridizing Species of Petunia, Solanum, and Nicotiana.
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Transmitting tissue-specific proteins (TTS proteins) are abundant in the extracellular matrix of Nicotiana pistils, and vital for optimal pollen tube growth and seed set. We have identified orthologs from several species in the Solanaceae, including Petuniaaxillaris axillaris
Mechanism of male sterility in Petunia : II. Free amino acids in male fertile and male sterile anthers during microsporogenesis.
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The free amino acid contents in the anthers of male fertile, cytoplasmic male sterile (cms) and genic male sterile (gms) petunia lines were compared at different developmental stages of the male gametophyte. Quantitative differences in the amounts of free amino acids were found between the fertile
Physiochemical properties of petunia edible flowers grown under saline conditions and their postharvest performance under modified atmosphere packaging and ethanol application.
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RESULTS
The impact of postharvest ethanol (ET) treatment and modified atmosphere packaging (MAP)Nitrogen metabolism and flower symmetry of petunia corollas treated with glyphosate.
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A change of flower shape was observed in petunia corollas treated with 0.5 mM glyphosate. Glyphosate changed the flower symmetry from the actinomorphic type to the zygomorphic type. Corollas treated with glyphosate showed an increased free amino acid content. Free amino acid profiles in petunia
Changes in protein and amino acid content during anther development in fertile and cytoplasmic male sterile Petunia.
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Development of anthers in cytoplasmic male sterile (CMS) Petunia diverges from the normal sequence of events early in meiosis. Quantitative and qualitative changes in morphology, proteins and free amino acid contents correlate with this divergence. In anthers of the fertile line (5719), total
Three hydroxyproline-rich glycopeptides derived from a single petunia polyprotein precursor activate defensin I, a pathogen defense response gene.
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Hydroxyproline-rich glycopeptides (HypSys peptides) are recently discovered 16-20-amino acid defense signals in tobacco and tomato leaves that are derived from cell wall-associated precursors. The peptides are powerful wound signals that activate the expression of defensive genes in tobacco and
Enhancement of Low pH Stress Tolerance in Anthocyanin-Enriched Transgenic Petunia Overexpressing RsMYB1 Gene.
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We investigated whether the presence of anthocyanins in plants could contribute to low pH stress tolerance using anthocyanin-enriched transgenic petunia lines (PM2, PM6, and PM8) expressing RsMYB1 and wild-type (WT) plants. We examined several physiological and biochemical factors and the transcript
Overexpression of an ABA biosynthesis gene using a stress-inducible promoter enhances drought resistance in petunia.
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The response of plants to drought stress includes reduced transpiration as stomates close in response to increased abscisic acid (ABA) concentrations. Constitutive overexpression of 9-cis-epoxycarotenoid dioxygenase (NCED), a key enzyme in ABA biosynthesis, increases drought resistance, but causes
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