Norbert Keutgen

Dr. Norbert Keutgen

orcid

Research Focus & Metrics

Academic Career Length

32Years (1995-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 1997 in Journal of Plant Physiology
Verified
Journal Article
Closed access
NKNorbert Keutgen
Norbert Keutgen
KCKai Chen
Kai Chen
FLFritz Lenz
Fritz Lenz

1 January 2001 in Journal of Plant Physiology
Verified
Journal Article
Closed access
NKNorbert Keutgen
Norbert Keutgen
KCK.A.I. Chen
K.A.I. Chen

29 May 2021 in Agronomy
Verified
Journal Article
Open access
PDF file
NKNorbert Keutgen
Norbert Keutgen
MHMichael Hausknecht
Michael Hausknecht
MTMagdalena Tomaszewska-Sowa
Magdalena Tomaszewska-Sowa
AKAnna Jadwiga Keutgen
Anna Jadwiga Keutgen
The present study addressed the combination of nutritional and sensory quality assessment of radish and garden cress as microgreens cultivated in different amounts of mineral nutrients under conditions that can be realized in a private household. The content of value adding compounds was determined by means of chemical analyses. Total flavor impression and visual appearance were rated by untrained consumer tests. In cotyledons of radish cress (Raphanus sativus L.), carotenoid, total phenols, nitrate contents, and antioxidant capacity decreased significantly with decreasing mineral content in the nutrient solution, whereas, in stems, total phenols and anthocyanin contents rose and nitrate content decreased significantly with decreasing mineral content. In garden cress (Lepidium sativum L.), carotenoid and nitrate contents decreased and anthocyanin content increased significantly with decreasing mineral content, indicating that the response of value adding compounds to changing amounts of minerals in the nutrient solution depends on the compound of interest, plant species, and even the plant organ of a species. The sensory quality of the studied microgreens was generally rated highest when mineral content in the nutrient solution was highest, indicating that sensory quality is not necessarily identical with nutritional quality. Considering the common practice in private households, cultivation with tap water represents an attractive compromise for nutritional and sensory quality in case of garden cress, whereas, for radish cress, the application of 25% modified Hoagland solution is recommended.

25 September 2019 in PLOS ONE
Verified
Journal Article
Open access
PDF file
AKAnna Jadwiga Keutgen
Anna Jadwiga Keutgen
EWElżbieta Wszelaczyńska
Elżbieta Wszelaczyńska
JPJarosław Pobereżny
Jarosław Pobereżny
APAgnieszka Przewodowska
Agnieszka Przewodowska
WPWłodzimierz Przewodowski
Włodzimierz Przewodowski
NKNorbert Keutgen
Norbert Keutgen
The concentrations of the bioactive compounds in potato tubers are determined by both genetic potential and environmental factors. The purpose of the experiment was to determine the influence of organic and integrated production on the expression of the genetic potential with respect to the antioxidant properties of potato tubers and to evaluate its stability under different environmental conditions. This phenotyping was performed on seven new breeding lines (tetraploid clones) and three modern cultivars: Jelly, Satina and Tajfun. The results indicated that production system and location significantly influenced the antioxidant capacity measured by FRAP method. Organic farming and the location Chwałowice were characterized by higher values. Furthermore, anitioxidative capacity measured by FRAP method was correlated with chlorogenic acid content (r = 0.590**) and glutathione fractions, especially with the reduced form (GSH, r = 0.692**). Multidimensional comparative analysis (MCA) proved a better development of antioxidant properties of potato tubers in the organic cultivation system when compared with the integrated. Especially favorable were growing conditions at Boguchwała (organic) and worst at Młochów (integrated). From all investigated varieties, the best antioxidant properties were found in ‘Satina’ and ‘Jelly’. Clones TG-97-403 and 13-VIII-45 developed the weakest health promoting traits.

1 January 2002 in Scientia Horticulturae
Verified
Journal Article
Closed access
AMAnna Mierowska
Anna Mierowska
NKNorbert Keutgen
Norbert Keutgen
MHMarius Huysamer
Marius Huysamer
VSValdon Smith
Valdon Smith

1 January 2002 in Journal of Plant Physiology
Verified
Journal Article
Closed access
MMMohamed Fouad Mohamed
Mohamed Fouad Mohamed
NKNorbert Keutgen
Norbert Keutgen
ATAzza A. Tawfika
Azza A. Tawfika
GNGeorg Noga
Georg Noga