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10 Ergebnisse
A thiol protease and an anionic peroxidase are induced by lowering cytokinins during callus growth in Petunia.
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We previously identified a group of proteins that increase early in Petunia hybrida calli subcultured on a low-cytokinin medium, unlike the calli subcultured on a high-cytokinin medium. The calli on the low-cytokinin medium do not regenerate (J.-P. Renaudin, C. Tournaire, B, Teyssendier de la Serve
Ethylene-sensitivity regulates proteolytic activity and cysteine protease gene expression in petunia corollas.
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To investigate ethylene's role in petal senescence, a comparative analysis of age-related changes in total protein, protease activity, and the expression of nine cysteine protease genes in the corollas of ethylene-sensitive Petuniaxhybrida cv. Mitchell Diploid (MD) and ethylene-insensitive
Overproduction of cytokinins in petunia flowers transformed with P(SAG12)-IPT delays corolla senescence and decreases sensitivity to ethylene.
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Plant senescence is regulated by a coordinated genetic program mediated in part by changes in ethylene, abscisic acid (ABA), and cytokinin content. Transgenic plants with delayed senescence are useful for studying interactions between these signaling mechanisms. Expression of ipt, a cytokinin
Genetic differences between Korean and American isolates of Petunia vein clearing virus.
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Petunia plants are used for urban landscaping in many parts of the world, including South Korea. In this study, we aimed to investigate the occurrence of petunia vein clearing virus (PVCV) infection in petunia plants in Seoul, South Korea. PVCV was detected from 23 of 79 petunia samples collected
Differential responses of Brassica napus and Petunia hybrida to leaf protoplast isolation stress.
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Changes in the response to abiotic stress during the isolation of leaf protoplasts were compared between a recalcitrant species of Brassica napus and regenerating species of Petunia hybrida. Initially, levels of soluble free putrescine (put), spermidine (spd) and spermine (spm) in leaves and
Purification of recombinant flavanone 3beta-hydroxylase from petunia hybrida and assignment of the primary site of proteolytic degradation.
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Flavanone 3beta-hydroxylase catalyzes the Fe(II)/oxoglutarate-dependent hydroxylation of (2S)-flavanones to (2R,3R)-dihydroflavonols in the course of flavonol/anthocyanin or catechin biosynthesis. The enzyme from Petunia hybrida consists of a 41,655-Da polypeptide that is prone to rapid proteolysis
Petunia vein-clearing virus: a plant pararetrovirus with the core sequences for an integrase function.
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Petunia vein-clearing virus (PVCV) is a plant pararetrovirus that has some features of retrotransposons. It encapsidates dsDNA and has isometric particles and inclusion bodies similar to those of caulimoviruses. The PVCV genome of 7205 bp has two large ORFs in the transcribed strand and a methionine
PH4 of Petunia is an R2R3 MYB protein that activates vacuolar acidification through interactions with basic-helix-loop-helix transcription factors of the anthocyanin pathway.
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The Petunia hybrida genes ANTHOCYANIN1 (AN1) and AN2 encode transcription factors with a basic-helix-loop-helix (BHLH) and a MYB domain, respectively, that are required for anthocyanin synthesis and acidification of the vacuole in petal cells. Mutation of PH4 results in a bluer flower color,
LC-MS/MS based comparative proteomics of floral nectars reveal different mechanisms involved in floral defense of Nicotiana spp., Petunia hybrida and Datura stramonium.
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Tobacco floral nectar (FN) is a biological fluid produced by nectaries composed of sugars, amino acids and proteins called nectarins, involved in the floral defense. FN provides an ideal source of nutrients for microorganisms. Understanding the role of nectar proteins is essential to predict impacts
Fruit developmental regulation of the kiwifruit actinidin promoter is conserved in transgenic petunia plants.
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We have examined the expression of actinidin, a cysteine protease found in kiwifruit, over the course of fruit development. Protease activity was first seen in fruit that had reached about half their final weight, and rose to high levels at harvest. The 5'-flanking region (nucleotides -1301 to +58)
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