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The partitioning of nitrate assimilation between root and shoot of higher plants
It is proposed that a greater proportion of nitrate assimilation occurs in the shoot when an increase in the rate of nitrates uptake does not induce an increaseIn NR level in the root, and a greaterportion of the nitrate taken up remains unassimilated and is passed into the xylem. Expand
Do plants need nitrate? The mechanisms by which nitrogen form affects plants
It is concluded that the form of N available to plants can affect their time and rate of seed germination, leaf expansion and function, dry matter partitioning between shoot and root, and root architecture. Expand
Nitrogen fixation in legumes and actinorhizal plants in natural ecosystems: values obtained using 15N natural abundance
Measurement of 15N natural abundance has given greater understanding of where legume and actinorhizal plant N2 fixation is important in natural ecosystems, and the average value for %Ndfa was substantially greater for actin ORHizal plants than for legumes. Expand
Ammonium can stimulate nitrate and nitrite reductase in the absence of nitrate in Clematis vitalba
Nitrogen assimilation was studied in the deciduous, perennial climber Clematis vitalba. When solely supplied with NO3– in a hydroponic system, growth and N-assimilation characteristics were similarExpand
Sun/shade acclimation and nitrogen nutrition of Tradescantia fluminensis, a problem weed in New Zealand native forest remnants.
Summary: Growth, sun/shade acclimation and nitrogen nutrition were examined in Tradescantia fluminensis to gain greater understanding of why this species is so successful in New Zealand native forestExpand
Nodulation of Sesbania species by Rhizobium (Agrobacterium) strain IRBG74 and other rhizobia
Concatenated sequence analysis with 16S rRNA, rpoB and fusA genes identified a bacterial strain isolated from root nodules of the aquatic legume Sesbania cannabina as a close relative of the plant pathogen Rhizobium radiobacter (syn. Agrobacterium tumefaciens), suggesting that IRBG74 is potentially a new species. Expand
Can genetic manipulation of plant nitrogen assimilation enzymes result in increased crop yield and greater N-use efficiency? An assessment
In the authors' opinion, selection of plants, from either a genetically manipulated population or genetic resources, with expression of nitrate reductase/nitrite reduct enzyme primarily in the root or shoot should increase plant/crop growth and hence yield under specific environmental conditions. Expand
Use of white clover as an alternative to nitrogen fertiliser for dairy pastures in nitrate vulnerable zones in the UK: productivity, environmental impact and economic considerations
White clover can provide the N required by a pasture at a lower financial cost than that incurred by the application of N fertiliser within nitrate vulnerable zones (NVZ) in the UK. Expand
Specificity in Legume-Rhizobia Symbioses
Strain-specific legume rhizobia symbioses can develop in particular habitats and are likely to be at least in part related to the relative occurrence of the potential symbionts in soils of the different regions. Expand
Effect of Water Stress, Nitrogen, and Gibberellic Acid on Fluazifop and Glyphosate Activity on Oats (Avena sativa)
Testing the efficacies of fluazifop and glyphosate against water-stressed plants, plants grown in low and high nitrogen (N), and plants treated with gibberellic acid found both herbicides were less toxic at low N than high N. Expand