title: Viability characterization of Taxus chinensis plant cell suspension  cultures by rapid colorimetric- and image analysis-based  techniques.
abstract: For the commercially established process of paclitaxel production with Taxus chinensis plant cell culture, the size of plant cell aggregates and phenotypic changes in coloration during cultivation have long been acknowledged as intangible parameters. So far, the variability of aggregates and coloration of cells are challenging parameters for any viability assay. The aim of this study was to investigate simple and non-toxic methods for viability determination of Taxus cultures in order to provide a practicable, rapid, robust and reproducible way to sample large amounts of material. A further goal was to examine whether Taxus aggregate cell coloration is related to general cell viability and might be exploited by microscopy and image analysis to gain easy access to general cell viability. The Alamar Blue assay was found to be exceptionally eligible for viability estimation. Moreover, aggregate coloration, as a morphologic attribute, was quantified by image analysis and found to be a good and traceable indicator of T. chinensis viability.
authors.forename: Thomas
authors.initials: T
authors.lastname: Wucherpfennig
authors.forename: Annika
authors.initials: A
authors.lastname: Schulz
authors.forename: Jaime Arturo
authors.initials: JA
authors.lastname: Pimentel
authors.forename: Gabriel
authors.initials: G
authors.lastname: Corkidi
authors.forename: Dominik
authors.initials: D
authors.lastname: Sieblitz
authors.forename: Matthias
authors.initials: M
authors.lastname: Pump
authors.forename: Gilbert
authors.initials: G
authors.lastname: Gorr
authors.forename: Kai
authors.initials: K
authors.lastname: Schütte
authors.forename: Christoph
authors.initials: C
authors.lastname: Wittmann
authors.forename: Rainer
authors.initials: R
authors.lastname: Krull
mesh_terms: D003124:Colorimetry; D015203:Reproducibility of Results; D013314:Stress, Mechanical; D020946:Taxus / Q000166:cytology*