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R. Geisen · SciRah

Researcher profile · Semantic Scholar

R. Geisen

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R. Geisen — researcher profile on SciRah

h-index: 42
Works: 174
Citations: 6,775

Most-cited papers

Complex regulation of the aflatoxin biosynthesis gene cluster of Aspergillus flavus in relation to various combinations of water activity and temperature.
M. Schmidt-Heydt, A. Abdel-Hadi, N. Magan, R. Geisen
2009Journal of food microbiology179 citations Open access
Semantic Scholar
Stress induction of mycotoxin biosynthesis genes by abiotic factors.
M. Schmidt-Heydt, N. Magan, R. Geisen
2008FEMS Microbiology Letters178 citations Open access
Semantic Scholar
Mycotoxins in harvested fruits and vegetables: Insights in producing fungi, biological role, conducive conditions, and tools to manage postharvest contamination
S. Sanzani, M. Reverberi, R. Geisen
2016169 citations Open access
Semantic Scholar
A systems approach to model the relationship between aflatoxin gene cluster expression, environmental factors, growth and toxin production by Aspergillus flavus
A. Abdel-Hadi, M. Schmidt-Heydt, R. Parra, R. Geisen +1 more
2012Journal of the Royal Society Interface161 citations Open access
Semantic Scholar
The production of aflatoxin B1 or G1 by Aspergillus parasiticus at various combinations of temperature and water activity is related to the ratio of aflS to aflR expression
M. Schmidt-Heydt, C. Rüfer, A. Abdel-Hadi, N. Magan +1 more
2010Mycotoxin Research141 citations Open access
Semantic Scholar
Impacts of environmental stress on growth, secondary metabolite biosynthetic gene clusters and metabolite production of xerotolerant/xerophilic fungi
Á. Medina, M. Schmidt-Heydt, Alicia Rodríguez, R. Parra +2 more
2015Current Genetics102 citations
Semantic Scholar
Influence of light on food relevant fungi with emphasis on ochratoxin producing species.
M. Schmidt-Heydt, C. Rüfer, Frank Raupp, Anja Bruchmann +2 more
2011Journal of food microbiology96 citations
Semantic Scholar
A microarray for monitoring the production of mycotoxins in food.
M. Schmidt-Heydt, R. Geisen
2007Journal of food microbiology90 citations
Semantic Scholar
The biosynthesis of ochratoxin A by Penicillium as one mechanism for adaptation to NaCl rich foods.
M. Schmidt-Heydt, E. Graf, D. Stoll, R. Geisen
2012Food microbiology89 citations
Semantic Scholar
Chlorogenic acid, a metabolite identified by untargeted metabolome analysis in resistant tomatoes, inhibits the colonization by Alternaria alternata by inhibiting alternariol biosynthesis
E. Wojciechowska, C. Weinert, B. Egert, B. Trierweiler +5 more
2014European journal of plant pathology83 citations Open access
Semantic Scholar
Physiological relationship between food preservatives, environmental factors, ochratoxin and otapksPV gene expression by Penicillium verrucosum.
M. Schmidt-Heydt, Esther S. Baxter, R. Geisen, N. Magan
2007Journal of food microbiology80 citations
Semantic Scholar
Modelling the relationship between environmental factors, transcriptional genes and deoxynivalenol mycotoxin production by strains of two Fusarium species
M. Schmidt-Heydt, R. Parra, R. Geisen, N. Magan
2011Journal of the Royal Society Interface76 citations Open access
Semantic Scholar
Biological control as a strategy to reduce the impact of mycotoxins in peanuts, grapes and cereals in Argentina
S. Chulze, J. M. Palazzini, A. Torres, G. Barros +4 more
2015Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment70 citations Open access
Semantic Scholar
Integrating toxin gene expression, growth and fumonisin B1 and B2 production by a strain of Fusarium verticillioides under different environmental factors
Á. Medina, M. Schmidt-Heydt, D. Cárdenas-Chávez, R. Parra +2 more
2013Journal of the Royal Society Interface65 citations Open access
Semantic Scholar
Oxidative stress induces the biosynthesis of citrinin by Penicillium verrucosum at the expense of ochratoxin.
M. Schmidt-Heydt, D. Stoll, P. Schutz, R. Geisen
2015Journal of food microbiology60 citations
Semantic Scholar
Trichoderma harzianum: Inhibition of mycotoxin producing fungi and toxin biosynthesis.
H. Braun, L. Woitsch, B. Hetzer, R. Geisen +2 more
2018Journal of food microbiology59 citations
Semantic Scholar
Fungicides effectively used for growth inhibition of several fungi could induce mycotoxin biosynthesis in toxigenic species.
Markus Schmidt-Heydt, D. Stoll, R. Geisen
2013Journal of food microbiology54 citations
Semantic Scholar
Differences in the Regulation of Ochratoxin A by the HOG Pathway in Penicillium and Aspergillus in Response to High Osmolar Environments
D. Stoll, M. Schmidt-Heydt, R. Geisen
2013Toxins52 citations Open access
Semantic Scholar
Effect of plastic mulching on mycotoxin occurrence and mycobiome abundance in soil samples from asparagus crops
Katherine Muñoz, M. Schmidt-Heydt, D. Stoll, D. Diehl +3 more
2015Mycotoxin Research51 citations
Semantic Scholar
HOG MAP kinase regulation of alternariol biosynthesis in Alternaria alternata is important for substrate colonization.
E. Graf, M. Schmidt-Heydt, R. Geisen
2012Journal of food microbiology50 citations
Semantic Scholar
Sulfoglucosides as Novel Modified Forms of the Mycotoxins Alternariol and Alternariol Monomethyl Ether.
Sebastian T. Soukup, Beate N. Kohn, E. Pfeiffer, R. Geisen +3 more
2016Journal of Agricultural and Food Chemistry49 citations Open access
Semantic Scholar
Influence of light on growth, fumonisin biosynthesis and FUM1 gene expression by Fusarium proliferatum.
F. Fanelli, M. Schmidt-Heydt, M. Haidukowski, R. Geisen +2 more
2012Journal of food microbiology48 citations
Semantic Scholar
Influence of light on growth, conidiation and fumonisin production by Fusarium verticillioides.
F. Fanelli, M. Schmidt-Heydt, M. Haidukowski, A. Susca +3 more
2012Fungal Biology47 citations
Semantic Scholar
Wavelength-Dependent Degradation of Ochratoxin and Citrinin by Light in Vitro and in Vivo and Its Implications on Penicillium
M. Schmidt-Heydt, B. Cramer, I. Graf, S. Lerch +2 more
2012Toxins47 citations Open access
Semantic Scholar
Influence of Different Nanomaterials on Growth and Mycotoxin Production of Penicillium verrucosum
Kathrin Kotzybik, V. Gräf, Lena Kugler, D. Stoll +3 more
2016PLoS ONE42 citations Open access
Semantic Scholar
Citrinin as an accessory establishment factor of P. expansum for the colonization of apples.
N. Touhami, Sebastian T. Soukup, M. Schmidt-Heydt, S. Kulling +1 more
2018Journal of food microbiology38 citations Open access
Semantic Scholar
The application of transcriptomics to understand the ecological reasons of ochratoxin a biosynthesis by Penicillium nordicum on sodium chloride rich dry cured foods
M. Schmidt-Heydt, E. Graf, Julia Batzler, R. Geisen
201137 citations
Semantic Scholar
Influence of light on ochratoxin biosynthesis by Penicillium
M. Schmidt-Heydt, H. Bode, Frank Raupp, R. Geisen
2010Mycotoxin Research37 citations
Semantic Scholar
New aspects of ochratoxin A and citrinin biosynthesis in Penicillium
R. Geisen, M. Schmidt-Heydt, N. Touhami, Annika Himmelsbach
2018Current Opinion in Food Science33 citations Open access
Semantic Scholar
Influence of Environmental Factors on the Production of Penitrems A–F by Penicillium crustosum
S. Kalinina, A. Jagels, B. Cramer, R. Geisen +1 more
2017Toxins32 citations Open access
Semantic Scholar
Aflatoxin: food chain transfer from feed to milk
H. Walte, C. Schwake-Anduschus, R. Geisen, J. Fritsche
2016Journal für Verbraucherschütz und Lebensmittelsicherheit32 citations Open access
Semantic Scholar
Mycotoxin production by different ochratoxigenic Aspergillus and Penicillium species on coffee- and wheat-based media
K. Muñoz, M. Vega, G. Ríos, R. Geisen +1 more
2011Mycotoxin Research31 citations
Semantic Scholar
Light regulation of mycotoxin biosynthesis: new perspectives for food safety
F. Fanelli, R. Geisen, M. Schmidt-Heydt, A. Logrieco +1 more
201630 citations Open access
Semantic Scholar
Influence of Light and Water Activity on Growth and Mycotoxin Formation of Selected Isolates of Aspergillus flavus and Aspergillus parasiticus
Eva-Maria Priesterjahn, R. Geisen, M. Schmidt-Heydt
2020Microorganisms29 citations Open access
Semantic Scholar
Comparative proteome analysis of Penicillium verrucosum grown under light of short wavelength shows an induction of stress-related proteins associated with modified mycotoxin biosynthesis.
D. Stoll, S. Link, S. Kulling, R. Geisen +1 more
2014Journal of food microbiology25 citations
Semantic Scholar
Mycotoxins as adaptation factors to food related environments
R. Geisen, N. Touhami, M. Schmidt-Heydt
201723 citations Open access
Semantic Scholar
Influence of light on growth, conidiation and the mutual regulation of fumonisin B2 and ochratoxin A biosynthesis by Aspergillus niger
F. Fanelli, M. Schmidt-Heydt, M. Haidukowski, R. Geisen +2 more
201223 citations
Semantic Scholar
Comprehensive molecular system to study the presence, growth and ochratoxin A biosynthesis of Penicillium verrucosum in wheat
M. Schmidt-Heydt, Wolfgang Richter, M. Michulec, G. Buttinger +1 more
2008Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment21 citations Open access
Semantic Scholar
Formation of B- and M-group aflatoxins and precursors by Aspergillus flavus on maize and its implication for food safety
A. Schamann, M. Schmidt-Heydt, R. Geisen, S. Kulling +1 more
2022Mycotoxin Research18 citations Open access
Semantic Scholar
Comparative analysis of the genomes and aflatoxin production patterns of three species within the Aspergillus section Flavi reveals an undescribed chemotype and habitat-specific genetic traits
A. Schamann, Sebastian T. Soukup, R. Geisen, Sabine E. Kulling +1 more
2024Communications Biology17 citations Open access
Semantic Scholar
Intraspecific variability of HOG1 phosphorylation in Penicillium verrucosum reflects different adaptation levels to salt rich habitats.
M. Schmidt-Heydt, D. Stoll, Jennifer Mrohs, R. Geisen
2013Journal of food microbiology16 citations
Semantic Scholar
Stress induction of mycotoxin biosynthesis gene
M. Schmidt-Heydt, R. Geisen
200816 citations
Semantic Scholar
Whole-Genome Sequencing of the Fungus Penicillium citrinum Reveals the Biosynthesis Gene Cluster for the Mycotoxin Citrinin
M. Schmidt-Heydt, D. Stoll, R. Geisen
2019Microbiology Resource Announcements13 citations Open access
Semantic Scholar
Arginine acts as an inhibitor of the biosynthesis of several mycotoxins.
N. Touhami, K. Buhl, M. Schmidt-Heydt, R. Geisen
2016Journal of food microbiology13 citations
Semantic Scholar
A strain of Fusarium kyushuense is able to produce aflatoxin B1 and G1
M. Schmidt-Heydt, S. Häckel, C. Rüfer, R. Geisen
2009Mycotoxin Research11 citations
Semantic Scholar
Aspects of the Occurrence, Genetics, and Regulation of Biosynthesis of the Three Food Relevant Penicillium Mycotoxins: Ochratoxin A, Citrinin, and Patulin
R. Geisen, M. Schmidt-Heydt, D. Stoll, N. Touhami
201810 citations
Semantic Scholar
Expression of a gfp gene in Penicillium nordicum under control of the promoter of the ochratoxin A polyketide synthase gene.
M. Schmidt-Heydt, T. Schunck, R. Geisen
2009Journal of food microbiology8 citations
Semantic Scholar
Physiological and Molecular Aspects of Ochratoxin A Biosynthesis
R. Geisen, M. Schmidt-Heydt
20098 citations
Semantic Scholar
Draft Genome Sequence of an Aflatoxin-Producing Aspergillus flavus Strain Isolated from Food
A. Schamann, R. Geisen, M. Schmidt-Heydt
2022Microbiology Resource Announcements7 citations Open access
Semantic Scholar
Analysis of the competitiveness between a non-aflatoxigenic and an aflatoxigenic Aspergillus flavus strain on maize kernels by droplet digital PCR
A. Schamann, M. Schmidt-Heydt, R. Geisen
2021Mycotoxin Research7 citations Open access
Semantic Scholar

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