Detlef Ulrich

ORCID: 0000-0003-3726-3691
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About
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Research Areas
  • Berry genetics and cultivation research
  • Horticultural and Viticultural Research
  • Fermentation and Sensory Analysis
  • Postharvest Quality and Shelf Life Management
  • Phytochemicals and Antioxidant Activities
  • Plant Physiology and Cultivation Studies
  • Advanced Chemical Sensor Technologies
  • Essential Oils and Antimicrobial Activity
  • Plant Pathogens and Fungal Diseases
  • Plant biochemistry and biosynthesis
  • Potato Plant Research
  • Phytochemistry and Biological Activities
  • Biochemical Analysis and Sensing Techniques
  • Phytochemical Studies and Bioactivities
  • Banana Cultivation and Research
  • Medicinal Plant Extracts Effects
  • Insect Pest Control Strategies
  • Pesticide Residue Analysis and Safety
  • Insect and Pesticide Research
  • Sensory Analysis and Statistical Methods
  • Insect-Plant Interactions and Control
  • Greenhouse Technology and Climate Control
  • Garlic and Onion Studies
  • Analytical Chemistry and Chromatography
  • Biochemical and biochemical processes

Julius Kühn-Institut
2014-2023

IPB University
2005

Institut für Zuckerrübenforschung
1995

Over a period of 3 years, the essential volatile compounds several strawberry varieties were analysed by gas chromatography, chromatography-olfactometry and mass spectrometry. In general, strong variability in dependence amount these on ripening stage, climate location was found, nevertheless, key aroma showed typical, genetically determined basic patterns. The quantification cultivated wild strawberries resulted definition types which corresponded with sensory evaluation. These can be used...

10.1007/s002170050154 article EN Zeitschrift für Lebensmittel-Untersuchung und -Forschung. B, Referate und Lebensmittelrecht 1997-09-01

Terpenes are an important group of secondary metabolites in carrots influencing taste and flavor, some them might also play a role as bioactive substances with impact on human physiology health. Understanding the genetic molecular basis terpene synthases (TPS) involved biosynthesis volatile terpenoids will provide insights for improving breeding strategies aimed at quality traits developing specific carrot chemotypes possibly useful pharmaceutical applications. Hence, combination metabolite...

10.3389/fpls.2017.01930 article EN cc-by Frontiers in Plant Science 2017-11-09

Abstract The inheritance of important aroma compounds is demonstrated by the use a model population Fragaria × ananassa . Two cultivars were chosen for crossing, ‘Mieze Schindler’ and ‘Elsanta’, which differ strongly in pedigree, phenotype, fruit traits, including flavour. hundred seedlings this cross‐combination randomly selected from 438 propagated, with three plants per seedling. Aroma analysis was performed automated headspace solid phase micro‐extraction combination non‐targeted data...

10.1111/j.1439-0523.2007.01422.x article EN Plant Breeding 2007-10-03

Abstract In plants, low molecular weight terpenes produced by terpene synthases (TPS) contribute to multiple ecologically and economically important traits. The present study investigates a carrot synthase gene cluster on chromosome 4 associated with volatile monoterpene production. Two mutants, yellow cola , which are contrasting in the content of terpenes, were crossed develop an F 2 mapping population. analysis revealed overlapping QTLs for sabinene, α-thujene, α-terpinene, γ-terpinene,...

10.1038/s41438-020-00412-y article EN cc-by Horticulture Research 2020-12-01

In this study, gas chromatography–olfactometry (GC-O) (sniffing) combined with chromatography–mass spectrometry (GC-MS) analysis was applied to identify volatile aroma-active compounds in homogenised segments of fresh and stored 'Mor' mandarins. The GC-O nasal impact frequency method used Twenty-three compounds, which seventeen odorants were identified by GC-MS. aroma mandarins derived from a mixture eleven that contribute 'green' [(E)-3-hexenol hexanal], 'fresh' [(E)-carveol], 'fruity'...

10.1111/j.1365-2621.2011.02740.x article EN International Journal of Food Science & Technology 2011-08-22

Fragaria vesca is the most distributed wild species in genus . Due to this biogeography a high diversity expect. During two harvest seasons sixteen accessions from different locations eastern habitat at Lake Baikal Siberia, Middle and Southern Europe Northern with Scandinavia Iceland were investigated as well of three described North American subspecies F. cultivars. Five very distinct European F ×ananassa cultivars chosen serve comparison. Beside brix value acid contents aroma patterns...

10.5073/jabfq.2013.086.006 article EN Journal of applied botany and food quality 2013-06-17

Three cultivars of snake fruits, Pondoh Hitam, Super, and Gading, were freshly extracted using liquid−liquid extraction. The aroma compounds the three samples analyzed by GC-MS GC−olfactometry nasal impact frequency (NIF) method. A total 24 odor-active associated with fruit. Methyl 3-methylpentanoate was regarded as character odorant typical fruit aroma. 2-Methylbutanoic acid, 3-methylpentanoic an unknown very high intensity found to be responsible for fruit's sweaty odor. Other odorants...

10.1021/jf048950h article EN Journal of Agricultural and Food Chemistry 2005-02-09

Volatile metabolites are a basis for sensory and resistance traits of Fragaria × ananassa . Stability expression is important the selection cultivars. For first time, stability volatiles in strawberry population after cross-combination two distinct cultivars ('Mieze Schindler' 'Elsanta') has been investigated. In this work, environmentally caused variations synthesis 18 were studied over years using model 158 clones. The varied throughout F1 seedling between years, defining stable unstable...

10.1021/jf1034948 article EN Journal of Agricultural and Food Chemistry 2011-01-10

in strawberry. Despite numerous investigations of the metabolic composition strawberries, description relationship between flavor pattern and consumer acceptance is inconsistent. The aim present study was to correlate overall liking (acceptance), intensity important sensory parameters, which were evaluated by a panel, data instrumental analyses like soluble solids content, titratable acidity volatile organic compound patterning. collected over period three harvest years. They are suitable...

10.5073/jabfq.2016.089.029 article EN DOAJ (DOAJ: Directory of Open Access Journals) 2016-08-01

Flavor improvement is currently one of the most important goals for strawberry breeders. At same time, it complex traits to improve, involving balanced combination several desired characteristics such as high sweetness, moderate acidity, and appropriate aroma compounds that are beginning be delineated in consumer tests. DNA-informed breeding will expedite selection traits, flavor, over traditional phenotypic evaluation, particularly when markers linked interests combined during process....

10.1007/s11032-017-0732-7 article EN cc-by Molecular Breeding 2017-10-01

In breeding programs wild strawberry species are used increasingly to enhance the genetic diversity and implement higher sensory quality.Next Fragaria moschata L. F. viridis Weston collections cultivars of vesca were standards for taste in Europe before development × ananassa Duch.around 250 years ago.Therefore, objective this research was evaluation patterns volatile organic compounds including around twenty character impact evaluated comparison standard ananassa.The metabolic measured...

10.3233/jbr-140067 article EN Journal of Berry Research 2014-04-11

The focus of the present work centers on diversity volatile patterns carrots. In total 15 main volatiles were semiquantified in leaves and roots using isolation by headspace solid phase microextraction followed gas chromatography with FID MS detection. Significant differences number compounds detected between cultivars as well years. Genotype–environment interactions (G × E) are discussed. most abundant metabolites, β-myrcene (leaves) terpinolene (roots), differ sum all (cultivar harvest...

10.1021/acs.jafc.5b00704 article EN Journal of Agricultural and Food Chemistry 2015-03-21

Lemon balm (Melissa officinalis L.) is used since ancient times because of its sedative, spasmolytic and antiviral effects. Its therapeutic impact due to the content essential oil rosmarinic acid. A set 68 M. genotypes was evaluated for composition For all level ploidy determined. The were clone plants grown two years at Quedlinburg. analysis secondary metabolites distillation, gas chromatography high performance liquid used. varied in this study ranges from 0.03 0.33% second cut 2010...

10.1007/s10722-018-0635-4 article EN cc-by Genetic Resources and Crop Evolution 2018-04-07
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