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Ralf Welsch

Researcher at University of Freiburg

Publications -  47
Citations -  3941

Ralf Welsch is an academic researcher from University of Freiburg. The author has contributed to research in topics: Phytoene synthase & Carotenoid. The author has an hindex of 28, co-authored 40 publications receiving 3278 citations. Previous affiliations of Ralf Welsch include University of Freiburg Faculty of Biology.

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Golden Rice: Introducing the β-Carotene Biosynthesis Pathway into Rice Endosperm by Genetic Engineering to Defeat Vitamin A Deficiency

Peter Beyer, +7 more
- 01 Mar 2002 - 
TL;DR: A hypothesis is developed that trans-lycopene or a trans-allycopene derivative acts as an inductor in a kind of feedback mechanism stimulating endogenous carotenogenic genes in rice endosperm.
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Provitamin A Accumulation in Cassava (Manihot esculenta) Roots Driven by a Single Nucleotide Polymorphism in a Phytoene Synthase Gene

Ralf Welsch, +9 more
- 01 Oct 2010 - 
TL;DR: It is shown that an allelic polymorphism in one of the two expressed phytoene synthase (PSY) genes is capable of enhancing the flux of carbon through carotenogenesis, thus leading to the accumulation of colored provitamin A carotanoids in storage roots.
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A Third Phytoene Synthase Is Devoted to Abiotic Stress-Induced Abscisic Acid Formation in Rice and Defines Functional Diversification of Phytoene Synthase Genes

Ralf Welsch, +4 more
- 01 May 2008 - 
TL;DR: The characterization of a novel third phytoene synthase gene (PSY) in rice (Oryza sativa), OsPSY3, and on the differences among all three PSY genes with respect to the tissue-specific expression and regulation upon various environmental stimuli, conclude that they originated from the most recent common ancestor,OsPSY1.
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Light‐dependent regulation of carotenoid biosynthesis occurs at the level of phytoene synthase expression and is mediated by phytochrome in Sinapis alba and Arabidopsis thaliana seedlings

Johannes von Lintig, +5 more
- 01 Sep 1997 - 
TL;DR: It is proposed that up-regulation of PSY mRNA levels leads to an increased capacity for the formation of carotenoids under light conditions leading to protochlorophyllide photoconversion, and only those light conditions which allow chlorophyll biosynthesis lead to a significant increase of theCarotenoid content.
Journal ArticleDOI

Transcription Factor RAP2.2 and Its Interacting Partner SINAT2: Stable Elements in the Carotenogenesis of Arabidopsis Leaves

Ralf Welsch, +4 more
- 01 Nov 2007 - 
TL;DR: In this paper, AtRAP2.2, a member of the APETALA2 (AP2)/ethylene-responsive element-binding protein transcription factor family, binds to the ATCTA element.