Nitrate concentration effects on NO3-N uptake and reduction, growth, and fruit yield in strawberry
Darnell, RL; Stutte, GW
| HERO ID | 1656009 |
|---|---|
| In Press | No |
| Year | 2001 |
| Title | Nitrate concentration effects on NO3-N uptake and reduction, growth, and fruit yield in strawberry |
| Authors | Darnell, RL; Stutte, GW |
| Journal | Journal of the American Society for Horticultural Science |
| Volume | 126 |
| Issue | 5 |
| Page Numbers | 560-563 |
| Abstract | Strawberries (Fragaria xananassa Duch. 'Osogrande') were grown hydroponically with three NO3-N concentrations (3.75, 7.5, or 15.0 mM) to determine effects of varying concentration on NO3-N uptake and reduction rates, and to relate these processes to growth and fruit yield. Plants were grown for 32 weeks, and NO3-N uptake and nitrate reductase (NR) activities in roots and shoots were measured during vegetative and reproductive growth. In general, NO3-N uptake rates increased as NO3-N concentration in the hydroponics system increased. Tissue NO3- concentration also increased as external NO3-N concentration increased, reflecting the differences in uptake rates. There was no effect of external NO3-N concentration on NR activities in leaves or roots during either stage of development. Leaf NR activity averaged approximately 360 nmol NO2 formed/g fresh weight (FW)/h over both developmental stages, while NR activity in roots was much lower, averaging approximately 115 nmol NO2 formed/g FW/h. Vegetative organ FW, dry weight (DW), and total fruit yield were unaffected by NO3-N concentration. These data suggest that the inability of strawberry to increase growth and fruit yield in response to increasing NO3-N concentrations is not due to limitations in NO3-N uptake rates, but rather to limitations in NO3- reduction and/or assimilation in both roots and leaves. |
| Doi | 10.21273/jashs.126.5.560 |
| Pmid | 12033227 |
| Wosid | WOS:000170586000007 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science WOS:000170586000007 |
| Is Public | Yes |
| Language Text | English |
| Keyword | biomass production; Fragaria xananassa; hydroponics; nitrate reductase; nitrogen |