Activité nitrate réductase in vitro de jeunes plantules de blé (Triticum aestivum L) cultivées dans les conditions de détermination de la faculté germinative et après amélioration de la nutrition et de l'éclairement

Bazzigalupi, O.; Deroche, ME; Lescure, JC; Bachelier, C.; Tardif, Stéphanie

doi:10.1051/agro:19920906

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(2 citation statements)

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“…Kevrešan et al, 1998;Sharma and Subhadra, 2010). Consequently, decreased amounts of leaf nitrate implied lower NRA levels (Kevrešan et al, 1998), which were also affected by the photosynthetic process (Bazzigalupi et al, 1992). Metabolites issued from the photosynthetic metabolism are essential to nitrate reduction.…”

Section: Discussionmentioning

confidence: 99%

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Nitrogen fixation and growth of Lens culinaris as affected by nickel availability: A pre-requisite for optimization of agromining

Saad

Kobaissi

Robin

et al. 2016

Environmental and Experimental Botany

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Low soil fertility in ultramafic soils limits the efficiency of nickel phytoextraction. Developing more efficient cropping systems for agromining can be achieved by the association of a hyperaccumulator with a legume by enhancing soil fertility. However, legume crops can result sensitive to ultramafic soil conditions, including nickel Ni availability. We assessed here whether Lens culinaris is adapted to ultramafic environments by growing on soils displaying a wide range of Ni concentrations and consequently producing functional nodules. The soil was enriched with different Ni concentrations ([Ni]) (0-90 mg Ni kg À1). Natural 15 N abundance was used to assess N 2 fixation (%Ndfa). Biotic parameters were investigated (nodule number, Ni, carbon and nitrogen concentrations, plant biomass. . .). Soil parameters were investigated (total [Ni], DTPA-extractable Ni, C and N concentrations. . .). Most of the physicochemical and biological parameters were significantly affected by the increased soil [Ni]. Nodule numbers per plant was lower under high [Ni] than control (soil without Ni). Nodules lost their capacities to fix N 2 under high Ni addition (90 mg Ni kg À1). For many parameters, there were no significant differences between control and treatments up to 60 mg of Ni kg À1 added to the soil. Lentil is able to grow on a soil containing amounts of Ni-DTPA similar to those generally found in serpentine soils. It could be used in association with a hyperaccumulator plant as a nitrogen provider in order to optimize Ni agromining. 2016 Elsevier B.V. All rights reserved.

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Section: Discussionmentioning

confidence: 99%

“…Metabolites issued from the photosynthetic metabolism are essential to nitrate reduction. Therefore, photosynthesis, related at the same time to leaf size and chlorophyll quantities, was limited, thus decreasing both the uptake and reduction of nitrate (Bazzigalupi et al, 1992).…”

Section: Discussionmentioning

confidence: 99%