Root-applied glycinebetaine decreases nitrate accumulation and improves quality in hydroponically grown lettuce
| Autor: | Kari Jokinen, Minnamari Edelmann, Pirjo Mäkelä, Anna-Kaisa Johanna Salovaara, Ilkka Simpura, Daniel O. Wasonga |
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| Přispěvatelé: | Department of Agricultural Sciences, Crop Science Research Group, Department of Food and Nutrition, Food quality and safety: lipids, vitamins and other bioactive compounds, Helsinki Institute of Sustainability Science (HELSUS), Plant Production Sciences |
| Rok vydání: | 2022 |
| Předmět: |
0106 biological sciences
ASSIMILATION Lactuca Growth BETAINE 01 natural sciences 4111 Agronomy Analytical Chemistry 03 medical and health sciences chemistry.chemical_compound Betaine Hydroponics Nitrate nitrate Vegetables NITROGEN FORMS LEAVES AMINO-ACIDS Dry matter FRUITS 030304 developmental biology Minerals 0303 health sciences Nitrates biology Lactuca sativa Maximum level EXOGENOUS APPLICATION General Medicine RED biology.organism_classification glycinebetaine Amino acid Plant Leaves lettuce Horticulture chemistry Amino acid composition Osmolyte Leafy vegetables Nutrient film technology 010606 plant biology & botany Food Science |
| Zdroj: | Food Chemistry. 366:130558 |
| ISSN: | 0308-8146 |
| Popis: | Leafy vegetables like lettuce (Lactuca sativa L.) naturally have high nitrate content and the European Commission has set maximum level for nitrate in lettuce. Glycinebetaine is an organic osmolyte alleviating plant stress, but its role in leaf nitrate accumulation remains unknown. The uptake of glycinebetaine by lettuce roots, and its potential to regulate lettuce nitrate content and improve plant quality were investigated. Two hydroponic lettuce experiments were conducted with different glycinebetaine application rates (Exp1 : 0, 1, 7.5, and 15 mM; Exp2: 0, 1 + 1 + 1, 1 + 10, and 4 mM). Plants were analyzed at varying time points. Root application resulted in glycinebetaine uptake and translocation to the leaves. Glycinebetaine concentrations > 7.5 mM reduced leaf nitrate up to 40% and increased leaf dry matter content. Glycinebetaine showed a positive effect on leaf mineral and amino acid composition. Thus, glycinebetaine could be a novel strategy to reduce the nitrate content in hydroponic lettuce. |
| Databáze: | OpenAIRE |
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