Nitrogen uptake and growth of wheat during O2 deficiency in root media containing NO3 - only, or NO3 - plus NH4
The effects of hypoxia at 0.003 mol O2 m-3 on growth and nitrogen uptake of wheat seedlings (Triticum aestivum L. ev. Gamenya) was compared between plants growing in nutrient solutions containing either NO3 - only, or NO3 - plus NH4 + . Hypoxia reduced the uptake of N by the plants, however both at...
| Veröffentlicht in: | The New phytologist. - 1979. - 111(1989), 2 vom: 20. Feb., Seite 161-166 |
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| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
1989
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| Zugriff auf das übergeordnete Werk: | The New phytologist |
| Schlagworte: | Journal Article Ammonium growth hypoxia nitrate wheat |
| Zusammenfassung: | The effects of hypoxia at 0.003 mol O2 m-3 on growth and nitrogen uptake of wheat seedlings (Triticum aestivum L. ev. Gamenya) was compared between plants growing in nutrient solutions containing either NO3 - only, or NO3 - plus NH4 + . Hypoxia reduced the uptake of N by the plants, however both at 0.28-0.31 mol O2 m-3 (aerated solutions) and 0.003 mol O2 m-3 , rates of N uptake from solutions containing NO3 - plus NH4 + were 34% higher than from solutions containing NO3 - only. In aerated solutions, growth was faster when NO3 - plus NH4 + was supplied. By contrast, at 0.003 mol O2 m-3 both N treatments had the same low growth rate (expressed on a dry weight basis) despite considerably higher internal N concentrations in the plants supplied with NO3 - plus NH4 + . It is concluded that N nutrition did not limit growth at 0.003 mol O2 m-3 in either N treatment. Other possible causes of the growth reduction and differences in uptake characteristics between NO3 - and NH4 + are discussed |
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| Beschreibung: | Date Revised 20.04.2021 published: Print Citation Status PubMed-not-MEDLINE |
| ISSN: | 1469-8137 |
| DOI: | 10.1111/j.1469-8137.1989.tb00677.x |