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Bio-physiological response of biofilter algal candidate Ulva sp. to different nitrogen forms and fluxes ArchiMer
Moustafa, Yasser T. A.; Bougaran, Gael; Callier, Myriam; Blancheton, Jean-paul.
The present study was carried out to study the long term effect of different nitrogen forms and concentrations (14.3, 28.6 and 57.1 µM N-NH4 and 214, 2360 and 3700 µM N-NO3) on the photosynthesis and relative growth rate (RGR) of Ulva sp. for five weeks. Nutrient-enriched seawater was supplied at an exchange rate of between 12.6 and 14.4 volumes per day. Relative growth rate was determined weekly. Photosynthetic oxygen evolution response was measured using 20 - 25 mg fresh weight seaweed incubated in a DW3 measuring chamber for 56 min under different irradiances with light and dark periods alternating every seven minutes. Photosynthetic light-response curves were drawn using 15 photosynthetic oxygen evolution readings normalized to dry weight. Experimental...
Tipo: Text Palavras-chave: Ulva sp.; Photosynthetic oxygen evolution; Relative growth rate; Nitrogen forms; Nutrients uptake..
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00251/36259/34807.pdf
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Nitrate reductase and glutamine synthetase activities in S1 endogamic families of the maize populations Sol da Manhã NF and Catetão Rev. Bras. Fisiol. Veg.
MACHADO,ALTAIR TOLEDO; SODEK,LADASLAV; PATERNIANI,ERNESTO; FERNANDES,MÂNLIO SILVESTRE.
The possibility of improving nitrogen use efficiency in maize was investigated using S1 endogamic families of the populations Sol da Manhã NF and Catetão. A simple 10 X 10 lattice design was adopted and the trials carried out at the experimental field of MITLA AGRÍCOLA LTDA, in Uberlândia, State of Minas Gerais, during the 1994/95 planting season. Based on grain production figures, the three best and three worst performing S1 endogamic families were selected for this study. These were pooled to form four sub-populations denominated NFB, NFR (the best and worst families, respectively, of the Sol da Manhã NF variety), CATB and CATR (the best and worst families, respectively, of the Catetão variety). Each of these sub-populations was evaluated under...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Corn; Nitrogen efficiency; Nitrogen forms; Nitrogen uptake.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000100010
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