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13 resultados
Cloning and characterization of resistance gene analogs from Avena species.
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Sequences analogous to plant resistance genes of the NBS-LRR class were cloned from the genomic DNA of 11 Avena species with different genomes and levels of ploidy. Three pairs of degenerate primers were used, based on conserved DNA sequence motifs belonging to the NBS domain, and 33 sequences were
Isolation and mapping of resistance gene analogs from the Avena strigosa genome.
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Degenerate primers based on conserved regions of the nucleotide binding site (NBS) domain (encoded by the largest group of cloned plant disease resistance genes) were used to isolate a set of 15 resistance gene analogs (RGA) from the diploid species Avena strigosa Schreb. These were grouped into
Proteomic and Physiological Analysis of the Response of Oat (Avena sativa) Seeds to Heat Stress under Different Moisture Conditions.
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Seeds lose their viability when they are exposed to high temperature and moisture content (MC) during storage. The expression and metabolism of proteins plays a critical role in seed resistance to heat stress. However, the proteome response to heat stress in oat (Avena sativa) seeds during storage
Isolation and sequence analysis of wheat NBS-LRR type disease resistance gene analogs using degenerate PCR primers.
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Isolation of disease resistance gene analogs (RGAs) using the conserved motifs of the resistance genes has attracted considerable attention since it was first reported more than a decade ago. In this study, RGAs are isolated using homology-based PCR to target the nucleotide binding site (NBS)
Gibberellin-regulated expression in oat aleurone cells of two kinases that show homology to MAP kinase and a ribosomal protein kinase.
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cDNA fragments from ten different protein kinases expressed in Avena sativa aleurone cells were amplified from mRNA by RT-PCR with degenerate primers. These could be classified into five groups: Aspk1-3 showed homology to the Snf1-related protein kinases, Aspk4-5 to a wheat ABA up-regulated protein
Effects of Exogenous 1,3-Diaminopropane and Spermidine on Senescence of Oat Leaves : II. Inhibition of Ethylene Biosynthesis and Possible Mode of Action.
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The effects of the polyamines spermidine and 1,3-diaminopropane on ethylene biosynthesis and chlorophyll (Chl) loss were studied in peeled leaves of oat (Avena sativa L., var. Victory) incubated in the dark. Peeling off the epidermal cells induces an increase in 1-aminocyclopropane-1-carboxylate
Stabilization of Oat Leaf Protoplasts through Polyamine-mediated Inhibition of Senescence.
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Protoplasts isolated from Avena sativa L. leaves undergo progressive senescence when incubated aseptically in 0.6 m mannitol with or without added nutrients. This senescence is manifested by morphological deterioration and ultimate lysis of protoplasts, by a decrease in incorporation of
Sad3 and sad4 are required for saponin biosynthesis and root development in oat.
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Avenacins are antimicrobial triterpene glycosides that are produced by oat (Avena) roots. These compounds confer broad-spectrum resistance to soil pathogens. Avenacin A-1, the major avenacin produced by oats, is strongly UV fluorescent and accumulates in root epidermal cells. We previously defined
The myth of nitrogen fertilization for soil carbon sequestration.
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Intensive use of N fertilizers in modern agriculture is motivated by the economic value of high grain yields and is generally perceived to sequester soil organic C by increasing the input of crop residues. This perception is at odds with a century of soil organic C data reported herein for the
Rotation of cells in an alternating electric field: theory and experimental proof.
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Protoplasts of Avena sativa rotate in an alternating electric field provided that at least two cells are located close to each other. An optimum frequency range (20 to 30 kHz) exists where rotation of all cells exposed to the field is observed. Below and above this frequency range, rotation of some
Transcriptomic analysis reveals the changes of energy production and AsA-GSH cycle in oat embryos during seed ageing
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Deterioration during seed storage generally causes seed vigour declining. However, the mechanism of deterioration occurred still not clear. Seeds and embryos of oat (Avena sativa L.) were selected to analyze the relation of physiological and metabolic reactions with DEGs by using RNA-seq. Oat seed
Heading for disaster: Fusarium graminearum on cereal crops.
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SUMMARY The rapid global re-emergence of Fusarium head blight disease of wheat and barley in the last decade along with contamination of grains with mycotoxins attributable to the disease have spurred basic research on the fungal causal agent. As a result, Fusarium graminearum quickly has become one
Residues of xenobiotics in the environment and phytotoxic activity in Armenia.
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The article presents the results of a dynamic study (spring, summer, and fall) of the residues of certain xenobiotics such as organochlorine pesticides (OCPs), synthetic surfactants (SSs) in surface water, soil, sludge, snow and phytotoxic activity in Ararat and Lori marzes of Armenia (2016-2017). A
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