Aged Seeds
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Optimization and sensitivity analysis of fast ethanol assay in maize seeds
Resumo: A avaliação da deterioração de sementes é muito importante para controlar a qualidade das sementes armazenadas. Este trabalho teve como objetivo investigar o potencial de um teste rápido de etanol para a avaliação da qualidade de sementes de milho armazenadas sob diferentes condições. O primeiro experimento consistiu em determinar a tempera
J. Seed Sci.. Publicado em: 2019-01
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2. Accumulation of organic and inorganic solutes in NaCl-stressed sorghum seedlings from aged and primed seeds
Although it has been known that the seed's physiological potential affects its response to osmoconditioning and abiotic stresses, researches involving seed aging and priming associated to abiotic stresses are scarce. The aim of this work was to evaluate the role of seed priming on salt tolerance in sorghum seedlings from seeds with two vigor levels (aged or
Scientia Agricola. Publicado em: 2011-12
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3. Envelhecimento artificial, osmocondicionamento e estresse osmÃtico em sementes de sorgo: parÃmetros fisiolÃgicos, bioquÃmicos e citoquÃmicos / Artificial aging, osmoconditioning and osmotic stress in sorghum seeds: physiological, biochemical and cytochemical parameters
This research was carried out in order to obtain basic data that can help them understand the physiological, biochemical and cytochemical responsible for the deterioration of aged seeds, reinvigoration of those primed and inhibition of germination and seedling establishment of sorghum under salt stress and study some of the mechanisms of adaptation to stress
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/03/2010
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4. Germinação de sementes de crotalária e de alface com o preparado homeopático de ácido giberélico / Germination of seeds of sunn hemp and lettuce with the homeopathic preparation to gibberellic acid
The effect of gibberellic acid ultradiluted (dynamizations 1CH to 12CH) on germination of lettuce and sunn hemp seeds was evaluated. The sunn hemp seeds were stored in cold chamber per one year and kept for six months under refrigeration before receiving homeopathic preparations in the water from imbibition during two hours. After that the seeds were placed
Publicado em: 2008
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5. Changes physiology and biochemistry of seeds of Melanoxylon brauna during deterioration / Alterações fisiológicas e bioquímicas de sementes de Melanoxylon brauna envelhecidas natural e artificialmente
The knowledge at present about the biochemical and physiologic changes in forest tree seeds is limited, as well as those of vigour evaluation testes during this stage. The objective of this work was to evaluate the physiological and biochemical changes of Melanoxylon brauna seeds during storage and the accelerated aging, establishing relations between these
Publicado em: 2008
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6. Alterações celulares durante o envelhecimento em sementes de Phaseolus vulgaris L. e Senna reticulata (Willdenow) Irwin &Barneby
In this work we compaired cytological and biochemical alterations during loss f viability of seeds of P.vulgaris and S.reticulata. Seeds were submitted to accelerated aging treatment during progressively larger time intervals, and both species suffered loss of viability under these conditions, but S.reticulata was more resistant. No seed of P.vulgaris germin
Publicado em: 1991
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7. Enhancement of Germination Rate of Aged Seeds by Ethylene
Naturally and artificially aged seeds of rape, Brassica napus L., produced less ethylene than freshly harvested seed during the early stage of germination. With freshly harvested seeds one peak of ethylene production was observed during germination, which coincided with the emergence and elongation of root and cotyledon, accompanied by splitting of the seed
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8. Ethanol and Acetaldehyde in Imbibing Soybean Seeds in Relation to Deterioration
Deterioration as evidenced by decline in germination or seedling growth of soybean (cv. Essex) seeds during accelerated aging treatments at 41 C and 100% relative humidity is accompanied by increased levels of acetaldehyde and ethanol in imbibing embryonic axes and seeds. These increases become more pronounced with duration of the aging treatment. A similar
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9. Lipid Peroxidation Associated with Accelerated Aging of Soybean Axes 1
Soybean seeds age rapidly during storage at high temperature and high relative humidity. The axes of such aged seeds contain high levels of malondialdehyde, a product of the peroxidation of unsaturated fatty acids. The levels of linoleic (18:2) and linolenic (18:3) acids in a polar lipid (phospholipid) fraction decrease during aging and more dramatically dur
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10. Protein repair L-isoaspartyl methyltransferase in plants. Phylogenetic distribution and the accumulation of substrate proteins in aged barley seeds.
Protein L-isoaspartate (D-aspartate) O-methyltransferases (MTs; EC 2.1.1.77) can initiate the conversion of detrimental L-isoaspartyl residues in spontaneously damaged proteins to normal L-aspartyl residues. We detected this enzyme in 45 species from 23 families representing most of the divisions of the plant kingdom. MT activity is often localized in seeds,
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11. Root Formation in Deteriorated (Aged) Wheat Embryos
Inability of aged seeds to grow into successful plants in the field is primarily due to their age-associated loss of rooting ability. The present work describes an attempt to initiate roots in nonrooting aged embryos of wheat (Triticum aestivum L.). Data presented give a comparative study of root formation and seedling growth on different culture media. Such
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12. Tocopherol and Organic Free Radical Levels in Soybean Seeds during Natural and Accelerated Aging 1
Soybean seeds which had aged in long-term storage (“natural aging”) or by exposure to high temperature and humidity (“accelerated aging”) were analyzed for their tocopherol and organic free radical contents. Tocopherol levels remained unchanged during both types of aging. Three principal tocopherol homologues (α, γ, δ) were present in fairly const