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Sida 1 från 164 resultat
Ornithine decarboxylase and arginine decarboxylase activities in meristematic tissues of tomato and potato plants.
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Ornithine decarboxylase and arginine decarboxylase activities were measured in roots and buds of tomato (Lycopersicon esculentum Mill. cv. Pearson ms-35) and potato (Solanum tuberosum cv. Desire) plants. In both tomato and potato, the activity of ornithine decarboxylase was the highest at the root
The arginine decarboxylase gene ADC1, associated to the putrescine pathway, plays an important role in potato cold-acclimated freezing tolerance as revealed by transcriptome and metabolome analyses.
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Low temperature severely influences potato production as the cultivated potato (Solanum tuberosum) is frost sensitive, however the mechanism underlying the freezing tolerance of the potato is largely unknown. In the present research, we studied the transcriptome and metabolome of the
NO and ABA Interaction Regulates Tuber Dormancy and Sprouting in Potato.
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In plants, nitric oxide synthase (NOS)-like or nitrate reductase (NR) produces nitric oxide (NO), which is involved in releasing seed dormancy. However, its mechanism of effect in potato remains unclear. In this study, spraying 40 μM sodium nitroprusside (SNP), an exogenous NO donor, quickly broke
Effects of charge-carrying amino acids on the gelatinization and retrogradation properties of potato starch.
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The objective of this study was to evaluate the effects of charge-carrying amino acids (lysine (Lys), arginine (Arg), aspartic acid (Asp) and glutamic acid (Glu)) on the gelatinization and retrogradation properties of potato starch. Acidic amino acids (Asp and Glu) showed a decreasing trend in
Effects of amino acids on the physiochemical properties of potato starch.
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The objective of this study was to evaluate effects of different amino acid additives (phenylalanine (Phe), methionine (Met), lysine (Lys), arginine (Arg), aspartic acid (Asp) and glutamic acid (Glu)) on the physicochemical properties of potato starch gels. Charge-carrying amino acids (Lys, Arg, Asp
Translation of potato virus S RNA in vitro: evidence of protein processing.
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RNA from potato virus S (PVS), a member of the carlavirus group, was translated in vitro in rabbit reticulocyte lysate. Time-course experiments revealed the largest product of Mr 190 kD, decreasing in intensity after 60-min incubations, correlating with the accumulation of a 150-kD peptide. This
Molecular characterization of coat protein genes of serologically distinct isolates of potato virus Y necrotic strain.
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The cost protein (CP) genes of two potato virus Y necrotic isolates (N27 and a mutant strain N27-92), which differed in their reactivity to a monoclonal antibody (mab), were characterized. Both isolates could be detected by mab 4E7, but mab VN295.5 selectively reacted to N27 and not to N27-92. The
Use of arginine compounds to examine the role of an essential arginine in the mechanism of glycogen phosphorylase.
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The possible role of arginine in the mechanism of muscle glycogen phosphorylase qas studied by examining the effect of arginine compounds. Guanidino compounds with an aromatic group inhibit native phosphorylase b, reduced phosphorylase b, phosphorylase b', and phosphorylase a. The inhibition was
A putative Δ1-pyrroline-5-carboxylate synthetase involved in the biosynthesis of proline and arginine in Leptinotarsa decemlineata.
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Delta 1-pyrroline-5-carboxylate synthetase (P5CS) catalyzes the conversion of glutamate (Glu) to Glu semialdehyde (GSA). GSA spontaneously cyclizes to form P5C. P5C is then reduced to proline (Pro) or is converted to ornithine, the intermediate for arginine (Arg) biosynthesis. In the present study,
Important amino acid residues of potato plant uncoupling protein (StUCP).
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Chemical modifications were used to identify some of the functionally important amino acid residues of the potato plant uncoupling protein (StUCP). The proton-dependent swelling of potato mitochondria in K(+)-acetate in the presence of linoleic acid and valinomycin was inhibited by mersalyl (K(i) =
Repression of the 14-3-3 gene affects the amino acid and mineral composition of potato tubers.
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Recently, transgenic potato plants were created showing underexpression of the 20R isoform of the 14-3-3 protein. The transgenic plants grown in tissue culture showed a significant increase in nitrate reductase activity and a decrease in nitrate level. The transgenic line with the lowest 14-3-3
Involvement of hydrogen peroxide and nitric oxide in expression of the ipomoelin gene from sweet potato.
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The IPO (ipomoelin) gene was isolated from sweet potato (Ipomoea batatas cv Tainung 57) and used as a molecular probe to investigate its regulation by hydrogen peroxide (H(2)O(2)) and nitric oxide (NO) after sweet potato was wounded. The expression of the IPO gene was stimulated by H(2)O(2) whether
The N-terminal propeptide and the C terminus of the precursor to 20-kilo-dalton potato tuber protein can function as different types of vacuolar sorting signals.
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Two types of vacuolar sorting signals (VSSs), an asparagine-proline-isoleucine-arginine-leucine (NPIRL)-related VSS in the N-terminal propeptides (NTPPs) and a C-terminal VSS in the C-terminal propeptides (CTPPs), function differently in plant cells. A precursor to a 20-kDa protein of potato tuber
Pseudomonas endophytica sp. nov., isolated from stem tissue of Solanum tuberosum L. in Spain.
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A bacterial strain named BSTT44(T) was isolated in the course of a study of endophytic bacteria occurring in stems and roots of potato growing in a soil from Salamanca, Spain. The 16S rRNA gene sequence had 99.7% identity with respect to that of its closest relative, Pseudomonas psychrophila E-3T,
Proteinase activity in potato plants.
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Several vegetative tissues of potato plants were screened for proteinase activity. Both endopeptidase and exopeptidase activities were investigated using gelatin and L-amino acid-4-nitroanilides (benzoyl-L-arginine-4-nitroanilide/BAPA, glutaryl-L-phenyl-alanine-4-nitroanilide/GLUPHEPA,
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