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Stranica 1 iz 179 rezultatima
Proline: A Novel Cryoprotectant for the Freeze Preservation of Cultured Cells of Zea mays L.
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Proline is an effective cryoprotectant for the storage of cultured cells of Zea mays L. in liquid N(2). Increased freeze tolerance can be achieved by pregrowth for 3 to 4 days in medium containing proline. Cells cryoprotected with proline have an increased recovery potential when compared with cells
The relationship of proline content and metabolism on the productivity of maize plants.
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The free proline content in maize ear-leaves, silk and pollen were analyzed in field grown plants which had matured to the pollination stage. Using maize hybrids PR34F02, PR35P12 and PR36B08 field trials were set up at two locations in eastern Croatia in two different years. Two enzymes of proline
Proline Accumulation in Maize (Zea mays L.) Primary Roots at Low Water Potentials (I. Requirement for Increased Levels of Abscisic Acid).
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Previous work showed that the concentration of proline (Pro) increases greatly in the primary root tip of maize (Zea mays L.) at low water potentials ([psi]w). It was also shown that the maintenance of root elongation at low [psi]w depends on increased levels of abscisic acid (ABA). In this study we
Effect of Exogenous Abscisic Acid on Proline Dehydrogenase Activity in Maize (Zea mays L.).
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Plant responses to drought stress include proline and abscisic acid (ABA) accumulation. Proline dehydrogenase (PDH) (EC 1.4.3) is the first enzyme in the proline oxidation pathway, and its activity has been shown to decline in response to water stress (PJ Rayapati, CR Stewart [1991] Plant Physiol
Solubilization of a Proline Dehydrogenase from Maize (Zea mays L.) Mitochondria.
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L-Proline is oxidized to pyrroline-5-carboxylic acid in intact plant mitochondria by a proline dehydrogenase (EC 1.4.3) that is bound to the matrix side of the inner mitochondrial membrane (TE Elthon, CR Stewart [1981] Plant Physiol 67: 780-784). This investigation reports the first solubilization
Metabolism of Proline, Glutamate, and Ornithine in Proline Mutant Root Tips of Zea mays (L.).
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In excised pro(1-1) mutant and corresponding normal type roots of Zea mays L. the uptake and interconversion of [(14)C]proline, [(14)C]glutamic acid, [(14)C]glutamine, and [(14)C]ornithine and their utilization for protein synthesis was measured with the intention of finding an explanation for the
A mutation causing proline requirement in Zea mays.
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A conditional seedling lethal, monogenic recessive, endosperm mutant is described. Phenotypic can be accomplished when embryos are cultured in vitro on media supplemented with proline. The efficiency of the repair is proportional to the concentration of proline in the medium. Normal growth is
Proline accumulation in maize (Zea mays L.) primary roots at low water potentials. II. Metabolic source of increased proline deposition in the elongation zone
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The proline (Pro) concentration increases greatly in the growing region of maize (Zea mays L.) primary roots at low water potentials (psiw), largely as a result of an increased net rate of Pro deposition. Labeled glutamate (Glu), ornithine (Orn), or Pro was supplied specifically to the root tip of
Storage protein characteristics of proline-requiring mutants of Zea mays (L.).
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Protein and amino acid composition of mature karnels from three allelic proline-requiring mutants in maize, pro 1-1, pro 1-2, and pro 1-3 were analyzed and compared to kernels of the stock A 188 containing the wild type allele. The amount of free proline was specifically reduced in the embryos of
Effects of L-proline and post-plating temperature treatment on Maize (Zea mays L.) anther culture.
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Comparison of different post-plating temperature regimes with a control treatment (27° C) revealed that a short-term cold (8/14°C:2/2 days or 14°C:4 days) as well as a heat treatment (30°C:14 days) increased the production of embryro-like-structures (ELS) from cultured maize anthers. The beneficial
Ameliorating effects of exogenously applied proline on seed composition, seed oil quality and oil antioxidant activity of maize (Zea mays L.) under drought stress.
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This study was carried out to appraise whether or not the exogenous application of a potential osmoprotectant, proline, could ameliorate the adverse effects of drought stress on maize seed and seed oil composition, as well as oil antioxidant activity. Water stress reduced the kernel sugar, oil,
Developmental and Hormonal Regulation of Genes Coding for Proline-Rich Proteins in Female Inflorescences and Kernels of Maize
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The pattern of expression of two genes coding for proteins rich in proline, HyPRP (hybrid proline-rich protein) and HRGP (hydroxyproline-rich glycoprotein), has been studied in maize (Zea mays) embryos by RNA analysis and in situ hybridization. mRNA accumulation is high during the first 20 d after
Effect of Putrescine, 4-PU-30, and Abscisic Acid on Maize Plants Grown under Normal, Drought, and Rewatering Conditions.
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The experiments were carried out with maize (Zea mays L.) seedlings, hybrid Kneja 530, grown hydroponically in a growth chamber. Twelve-day-old plants were foliar treated with putrescine, N1-(2-chloro-4-pyridyl)-N2-phenylurea (4-PU-30), and abscisic acid (ABA) at concentrations of 10(-5) m.
Impacts of seed priming with salicylic acid and sodium hydrosulfide on possible metabolic pathway of two amino acids in maize plant under lead stress.
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Heavy metals pollution is one of the key environmental problems. In this research, the effect of seed priming with salicylic acid and sodium hydrosulfide was investigated on methionine and arginine amino acids contents and some compounds derived from their metabolism as well as ZmACS6 and ZmSAMD
Effect of zinc-resistant Lysinibacillus species inoculation on growth, physiological properties, and zinc uptake in maize (Zea mays L.)
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Soil contamination by heavy metals is one of the major abiotic stresses that cause retarded plant growth and low productivity. Among the heavy metals, excessive accumulations of zinc (Zn) cause toxicity to plants. The toxicity caused by Zn could be managed by application of Zn-tolerant plant
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