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51.
In order to identify soybean cultivars with higher biological N2 fixation capacities, North American and Brazilian soybean [Glycine max (L.) Merrill] cultivars, belonging to maturity groups VI–VIII, were evaluated for nodulation parameters and N2 fixation rates. The symbiotic performance of 152 cultivars was evaluated in pots containing 4 kg soil with an established
population of the three Bradyrhizobium elkanii strains [29w (SEMIA 5019):SEMIA 566 : SEMIA 587, 22%:36%:34%] which are established in most Brazilian soils cultivated with
soybean. Differences were verified among cultivars, with some accumulating up to twice as much nodule dry weight and N in
tissues as others. The variability among cultivars was also confirmed when six of them were used in a field experiment, resulting
in differences in nodulation, yield and total N accumulated in grains. The analysis of nodule occupancy in 12 cultivars grown
either under sterile conditions and receiving a double inoculum and N-free nutrient solution, or in pots containing soil with
an established population of bradyrhizobia, showed the preference of cultivars for specific strains.
Received: 7 December 1998 相似文献
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Composition of peptide mixtures derived from simulated gastrointestinal digestion of prolamins from different wheat varieties 总被引:1,自引:0,他引:1
Barbara Prandi Mariangela Bencivenni Andrea Faccini Tullia Tedeschi Arnaldo Dossena Rosangela Marchelli Gianni Galaverna Stefano Sforza 《Journal of Cereal Science》2012
Gliadin content of wheat is highly variable, both qualitatively and quantitatively, in function of the plant genetic and of the growing conditions. The gliadins are among the major triggers of celiac disease: peptides derived from the gastrointestinal digestion of these proteins and absorbed from the lamina propria cause the immunological reactions that damage the villous structure in affected subjects. In the present work, the peptide mixtures generated by simulated gastrointestinal digestion of the prolamin fraction extracted from different wheat varieties (Triticum turgidum subsp. durum and Triticum aestivum) were characterized by LC/MS and LC-MS/MS techniques. Peptides related to the amount of α-gliadin, as well as toxic and immunogenic peptides for celiac patients have been identified and quantified using an isotopically labeled internal standard. The quantification demonstrated strong differences among the varieties tested. Some samples, belonging to the same varieties and/or cultivation area, showed a lower α-gliadin content, and a smaller amount of toxic and immunogenic peptides. 相似文献
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Gianluigi Mazzoccoli Angelo De Cata Antonio Greco Marcello Damato Nunzia Marzulli Mariangela Pia Dagostino Stefano Carughi Federico Perfetto Roberto Tarquini 《Journal of circadian rhythms》2010,8(1):6
Background
Immunosenescence is a process that affects all cell compartments of the immune system and the contribution of the immune system to healthy aging and longevity is still an open question. Lymphocyte subpopulations present different patterns of circadian variation and in the elderly alteration of circadian rhythmicity has been evidenced. The aim of our study was to analyze the dynamics of variation of specific cytotoxic lymphocyte subsets in old aged subjects. 相似文献55.
Diogo Fernando Saturno Paula Cerezini Pedro Moreira da Silva Arnold Barbosa de Oliveira Maria Cristina Neves de Oliveira Mariangela Hungria 《Journal of plant nutrition》2017,40(12):1690-1701
Soybean (Glycine max Merrill) crop production in Brazil relies mainly on biological nitrogen fixation (BNF) for nitrogen (N) supply. Recent adoption of indeterminate growth-type genotypes has raised doubts on the need for supplemental mineral N that might negatively affect the BNF. We assessed the effects of mineral N on BNF attributes of soybean genotypes grown in central and southern Brazil. Genotypes were inoculated with Bradyrhizobium sp. and/or received mineral N in three sets of experiments. In the first set, two genotypes received increasing rates of mineral N in nutrient solution, which consistently reduced the BNF. In the second set, mineral N applied at sowing and/or topdressing reduced nodulation and ureides-N in determinate and indeterminate growth-type genotypes. In the third set, mineral N applied at R5.3 stage, foliar or as topdressing, did not increase grain yield in four field experiments. Mineral N impaired BNF irrespective of the growth type and had no effect on grain yield. 相似文献
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Mariangela Marrelli Monica Rosa Loizzo Marcello Nicoletti Francesco Menichini Filomena Conforti 《Plant foods for human nutrition (Dordrecht, Netherlands)》2013,68(4):340-346
One of the most important strategy in the treatment of obesity includes the development of nutrient digestion and absorption inhibitors. Inhibition of digestive enzymes is one of the most widely studied mechanisms used to determine the potential efficacy of natural products as hypolipidemic and hypoglycaemic agents. In vitro studies here reported were performed to evaluate the inhibitory activity of five species (as hydroalcoholic extracts) of edible plants from Calabria region (Italy) on amylase and lipase by monitoring the hydrolysis of p-NPC and the hydrolysis of glycoside bonds in digestible carbohydrate foods. The formulation obtained from Clematis vitalba L. exhibited the strongest inhibitory effect on pancreatic lipase (IC50?=?0.99 mg/ml) and on α-amylase (IC50?=?31.52 μg/ml). In order to explore metabolome production HPTLC analysis of the extracts was performed, revealing the predominance of (±)-catechin, caffeic acid and chlorogenic acid in C. vitalba formulation at concentration of 23.18?±?3.14, 13.63?±?0.65 and 18.88?±?0.76 mg/g, respectively. GC/MS analysis was used to identify fatty acids and terpene composition. 相似文献