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41.
Oliveira Josiele Polzin Galli-Terasawa Lygia Vitoria Enke Chirlei Gli Cordeiro Vanessa Kava Armstrong Larice Carolina Tavares Hungria Mariangela 《World journal of microbiology & biotechnology》2011,27(3):643-650
Brazil is the largest producer and consumer of common bean worldwide, and the crop can benefit from its symbiosis with a variety
of rhizobia by means of biological nitrogen fixation in root nodules. In this study, the role of Mesoamerican and Andean genotypes
of common bean in trapping rhizobia directly from a Brazilian oxisol in the field or in pots in greenhouse conditions with
unaltered or diluted soil solutions was investigated. Genetic diversity was evaluated by the profiles of BOX-PCR obtained,
and by estimates of Shannon and Abundance-based Coverage Estimator (ACE) indices. Rhizobia trapped by Mesomaerican genotypes
had greater diversity, reinforcing the hypothesis of an important and long-time contribution of this genetic center to the
establishment of common bean in Brazil. Greater diversity was also seen in rhizobia trapped straight from the soil than from
plants inoculated with diluted soil solutions, emphasizing a highly diverse and competitive rhizobial indigenous population.
Studies on genetic diversity of common bean rhizobia are important not only for helping to understand the evolution of the
legume-rhizobia symbiosis, but also to devise strategies to increase the contribution of the biological nitrogen-fixation
process. 相似文献
42.
Ian R Mackenzie Stefanie L Butland Rebecca S Devon Emily Dwosh Howard Feldman Caroline Lindholm Scott J Neal Francis BR Ouellette Blair R Leavitt 《BMC neurology》2006,6(1):32-7
Background
Many cases of frontotemporal dementia (FTD) are familial, often with an autosomal dominant pattern of inheritance. Some are due to a mutation in the tau- encoding gene, on chromosome 17, and show an accumulation of abnormal tau in brain tissue (FTDP-17T). Most of the remaining familial cases do not exhibit tau pathology, but display neuropathology similar to patients with dementia and motor neuron disease, characterized by the presence of ubiquitin-immunoreactive (ub-ir), dystrophic neurites and neuronal cytoplasmic inclusions in the neocortex and hippocampus (FTLD-U). Recently, we described a subset of patients with familial FTD with autopsy-proven FTLD-U pathology and with the additional finding of ub-ir neuronal intranuclear inclusions (NII). NII are a characteristic feature of several other neurodegenerative conditions for which the genetic basis is abnormal expansion of a polyglutamine-encoding trinucleotide repeat region. The genetic basis of familial FTLD-U is currently not known, however the presence of NII suggests that a subset of cases may represent a polyglutamine expansion disease. 相似文献43.
B Nagy BR Watters PDW van der Merwe FPD Cotterill DU Bellstedt 《African Journal of Aquatic Science》2017,42(3):201-218
Nothobranchius cooperi, Nagy, Watters and Bellstedt, new species, is described from seasonal streams and ephemeral pools associated with the upper Mansa River system in the middle Luapula drainage and systems draining into the low-lying area marginal to the southwestern part of Lake Bangweulu, in the Luapula province of northern Zambia. It belongs to the N. brieni species group. Males of Nothobranchius cooperi are distinguished from congeners by the following unique combination of characters: body scales with broad orange posterior margin, forming a highly irregular cross-barred pattern; anal fin fairly uniform orange-red with irregular to regular, light blue-green zone close to the base; caudal peduncle length 1.2–1.3 times its depth; prepelvic length 48.8–51.9% SL; and head depth 75–77% of head length. Genetic divergence of the mitochondrial COI and ND2 genes and nuclear S7 gene support the distinction of the new species from its closest known relative, N. rosenstocki and confirms its position in the N. brieni species group. 相似文献
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