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12 resultados
Effects of photooxidation on membrane integrity in Salix nigra seeds.
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OBJECTIVE
Salix nigra seeds are desiccation-tolerant, as are orthodox seeds, although in contrast to other orthodox seeds they lose viability in a few weeks at room temperature. They also differ in that the chloroplasts of the embryo tissues conserve their chlorophyll and endomembranes. The aim of
Recent Sex Chromosome Divergence despite Ancient Dioecy in the Willow Salix viminalis.
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Sex chromosomes can evolve when recombination is halted between a pair of chromosomes, and this can lead to degeneration of the sex-limited chromosome. In the early stages of differentiation sex chromosomes are homomorphic, and even though homomorphic sex chromosomes are very common throughout
Genome assembly of the basket willow, Salix viminalis, reveals earliest stages of sex chromosome expansion
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Background: Sex chromosomes have evolved independently multiple times in eukaryotes and are therefore considered a prime example of convergent genome evolution. Sex chromosomes are known to emerge after recombination is halted between a
Mechanisms by which PE21, an extract from the white willow Salix alba, delays chronological aging in budding yeast.
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We have recently found that PE21, an extract from the white willow Salix alba, slows chronological aging and prolongs longevity of the yeast Saccharomyces cerevisiae more efficiently than any of the previously known pharmacological interventions. Here, we investigated mechanisms
Deterioration of willow seeds during storage.
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Willow (Salix spp.) seeds are able to tolerate desiccation, but differ from typical orthodox seeds in that they lose viability in a few days at room temperature, and in that the chloroplasts in embryo tissues do not dedifferentiate during maturation drying, thus retaining chlorophyll and maintaining
Quantitative analysis of flavanones and chalcones from willow bark.
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Willow bark extracts are used for the treatment of fever, pain and inflammation. Recent clinical and pharmacological research revealed that not only the salicylic alcohol derivatives, but also the polyphenols significantly contribute to these effects. Quantitative analysis of the European
Survival and death of seeds during liquid nitrogen storage: a case study on seeds with short lifespans.
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BACKGROUND
The low temperature of liquid nitrogen is assumed to stop ageing and preserve viability indefinitely, however there are few validating data sets. The use of seeds to test these assumptions is important because other cryopreserved systems lack quantitative measures of viability to allow
Long-term monitoring for conservation management: Lessons from a case study integrating remote sensing and field approaches in floodplain forests.
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Implementing long-term monitoring programs that effectively inform conservation plans is a top priority in environmental management. In floodplain forests, historical pressures interplay with the complex multiscale dynamics of fluvial systems and require integrative approaches to pinpoint drivers
Chronic tubulointerstitial nephropathy in six okapis (Okapia johnstoni).
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Renal tubular atrophy with conical and medullary interstitial fibrosis with severe thickening of the basement membranes of atrophic tubules was found in six okapis (Okapia johnstoni). Focal glomerular atrophy, probably secondary to ischemic collapse of the glomerular capillary tuft, was also
Combination of culture-dependent and -independent methods reveals diverse acyl homoserine lactone-producers from rhizosphere of wetland plants.
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The culture-dependent method and a degenerate primer-based culture-independent method were combined in an effort to identify N-acyl homoserine lactone (AHL) producers in rhizosphere of wetland plants, Salix babylonica (willow) and Phragmites australis (reed). Overall, eight potential AHL-producing
Mycorrhizal status of plant species in the Chaco Serrano Woodland from central Argentina.
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We examined the mycorrhizal type of 128 plant species in two patches of native vegetation of the Chaco Serrano Woodland, central Argentina, the largest dry forest area in South America. Of the 128 plant species investigated (belonging to 111 genera in 53 families), 114 were colonized by arbuscular
[Developmental instability of the organism as a result of pessimization of environment under anthropogenic transformation of natural landscapes].
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The value of fluctuating asymmetry is considered to be an indicator of the developmental instability of the organism. The consequences of activities of the mining industry plants, which are characterized by alienation and transformation of large areas of natural landscapes, are analyzed as an
La base de datos de hierbas medicinales más completa respaldada por la ciencia
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