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| Content Provider | Springer Nature Link |
|---|---|
| Author | Arkoun, Mustapha Jannin, Laëtitia Laîné, Philippe Etienne, Philippe Masclaux Daubresse, Céline Citerne, Sylvie Garnica, Maria Garcia Mina, José Maria Yvin, Jean Claude Ourry, Alain |
| Copyright Year | 2012 |
| Abstract | Urea is the major nitrogen (N) form supplied as fertilizer in agriculture. However, urease, a nickel-dependent enzyme, allows plants to use external or internally generated urea as a nitrogen source. Since a urease inhibitor is frequently applied in conjunction with urea fertilizer, the N-metabolism of plants may be affected. The aim of this study was to determine physiological and molecular effects of nickel deficiency and a urease inhibitor on urea uptake and assimilation in oilseed rape.Plants were grown on hydroponic solution with urea as the sole N source under three treatments: plants treated with nickel (+Ni) as a control, without nickel (−Ni) and with nickel and phenylphosphorodiamidate (+Ni+PPD). Urea transport and assimilation were investigated.The results show that Ni-deficiency or PPD supply led to reduced growth and reduced $^{15}$N-uptake from urea. This effect was more pronounced in PPD-treated plants, which accumulated high amounts of urea and ammonium. Thus, Ni-deficiency or addition of PPD, limit the availability of N and decreased shoot and root amino acid content. The up-regulation of BnDUR3 in roots indicated that this gene is a component of the stress response to nitrogen-deficiency. A general decline of glutamine synthetase (GS) activity and activation of glutamate dehydrogenase (GDH) and increases in its expression level were observed in control plants. At the same time, in (−N) or (+Ni+PPD) treated plants, no increases in GS or GDH activities and expression level were found.Overall results showed that plants require Ni as a nutrient (while most widely used nutrient solutions are devoid of Ni), whether they are grown with or without a urea supply, and that urease inhibitors may have deleterious effects at least in hydroponic grown oilseed rape. |
| Starting Page | 79 |
| Ending Page | 92 |
| Page Count | 14 |
| File Format | |
| ISSN | 0032079X |
| Journal | Plant and Soil |
| Volume Number | 362 |
| Issue Number | 1-2 |
| e-ISSN | 15735036 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2012-05-08 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Urea BnDUR3 $^{15}$N-labeling Nickel Phenylphosphorodiamidate (PPD) Enzymatic activities Gene expressions Plant Sciences Soil Science & Conservation Plant Physiology Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Soil Science Plant Science |
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