pelargonium graveolens/nikotin

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Nicotiana benthamiana plants asymptomatically infected by Pelargonium line pattern virus show unusually high accumulation of viral small RNAs that is neither associated with DCL induction nor RDR6 activity.

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Pelargonium line pattern virus (PLPV, Tombusviridae) normally establishes systemic, low-titered and asymptomatic infections in its hosts. This type of interaction may be largely determined by events related to RNA silencing, a major antiviral mechanism in plants. This mechanism is triggered by

Characterization of geranium (Pelargonium graveolens) chloroplast EF-Tu cDNA.

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A geranium (Pelargonium graveolens) chloroplast translational elongation factor EF-Tu (tufA) cDNA was isolated. The geranium tufA cDNA is 1,584 bp long with 20 bp of 5' untranslated region (UTR) and 139 bp of 3' UTR. It encodes 474 amino acids including a putative chloroplast transit peptide of 65

An efficient in vitro procedure for micropropagation and generation of somaclones of rose scented Pelargonium.

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Efficient protocols have been established for both direct and indirect regeneration of plants in Pelargonium graveolens Indian cultivar Hemanti (Algerian type). Murashige and Skoog's (MS) medium [T. Murashige, F. Skoog, A revised medium for rapid growth and bioassays with tobacco tissue cultures.

Phytophthora x pelgrandis, a new natural hybrid pathogenic to Pelargonium grandiflorum hort.

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A new Phytophthora hybrid of Ph. cactorum (Leb. & Cohn) Schroet. and Ph. nicotianaevan Breda de Haan pathogenic to cultivars of Pelargonium grandiflorum hort. is described as Phytophthora X pelgrandis and its morphological features are documented. Morphological, physiological (e.g., temperature

Efficient Translation of Pelargonium line pattern virus RNAs Relies on a TED-Like 3´-Translational Enhancer that Communicates with the Corresponding 5´-Region through a Long-Distance RNA-RNA Interaction.

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Cap-independent translational enhancers (CITEs) have been identified at the 3´-terminal regions of distinct plant positive-strand RNA viruses belonging to families Tombusviridae and Luteoviridae. On the bases of their structural and/or functional requirements, at least six classes of CITEs have been

First Report of Pelargonium zonate spot virus from Tomato in the United States.

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Pelargonium zonate spot virus (PZSV) was first isolated from tomato in southern Italy in 1982 (1) and later was also reported from Spain (3) and France (2). Infected tomato plants showed stunting, malformation, yellow rings and line patterns on the leaves, and concentric chlorotic ringspots on the

Biological activity of transcripts from cDNA of Pelargonium line pattern virus.

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A set of cDNAs of Pelargonium line pattern virus (PLPV) was assembled under the control of T7 RNA polymerase promoter and ligated into the plasmid pUC18. Transcripts synthesized in vitro from cDNA were infectious on Chenopodium quinoa according to locally induced lesions and hybridization assay. The

First Report of an Isolate of Pelargonium zonate spot virus in Commercial Glasshouse Tomato Crops in Southeastern France.

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In summer 2000, symptoms similar to Pelargonium zonate spot virus (PZSV) were observed for the first time on tomato plants in southeastern France. The plants were from commercial glasshouse fresh-market crops. Symptoms observed were chlorotic mottling with bright yellow distinct rings on leaves and

First Report of Natural Infection of Greenhouse-Grown Tomato and Weed Species by Pelargonium zonate spot virus in Spain.

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Tomato (Lycopersicon esculentum Mill.) plants showing severe chlorotic and necrotic ringspots, line patterns on leaves, and concentric chlorotic ringspots on stems and fruits were observed in plastic greenhouse-grown tomato crops cv. Royesta during the spring of 1996 in Zaragoza province, Northeast

The levels of male gametic mitochondrial DNA are highly regulated in angiosperms with regard to mitochondrial inheritance.

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The mechanisms that regulate mitochondrial inheritance are not yet clear, even though it is 100 years since the first description of non-Mendelian genetics. Here, we quantified the copy numbers of mitochondrial DNA (mtDNA) in the gametic cells of angiosperm species. We demonstrate that each egg cell

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