Root-Applied Glycinebetaine Decreases Nitrate Accumulation and Improves Quality in Hydroponically Grown Lettuce

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http://hdl.handle.net/10138/334648

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Jokinen , K , Salovaara , A-K J , Wasonga , D , Edelmann , M , Simpura , I & Mäkelä , P 2022 , ' Root-Applied Glycinebetaine Decreases Nitrate Accumulation and Improves Quality in Hydroponically Grown Lettuce ' , Food Chemistry , vol. 366 , 130558 . https://doi.org/10.1016/j.foodchem.2021.130558

Titel: Root-Applied Glycinebetaine Decreases Nitrate Accumulation and Improves Quality in Hydroponically Grown Lettuce
Författare: Jokinen, Kari; Salovaara, Anna-Kaisa Johanna; Wasonga, Daniel; Edelmann, Minnamari; Simpura, Ilkka; Mäkelä, Pirjo
Upphovmannens organisation: 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
Datum: 2022-01-01
Språk: eng
Sidantal: 9
Tillhör serie: Food Chemistry
ISSN: 0308-8146
DOI: https://doi.org/10.1016/j.foodchem.2021.130558
Permanenta länken (URI): http://hdl.handle.net/10138/334648
Abstrakt: 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.
Subject: 4111 Agronomy
glycinebetaine
nitrate
lettuce
Amino acid
Growth
Lactuca sativa
Minerals
Nutrient film technology
EXOGENOUS APPLICATION
NITROGEN FORMS
AMINO-ACIDS
BETAINE
ASSIMILATION
LEAVES
FRUITS
RED
Referentgranskad: Ja
Licens: cc_by
Användningsbegränsning: openAccess
Parallelpublicerad version: publishedVersion


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