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Akym Assani, Sylvie Moundanga, Laurent Beney, Patrick Gervais
BACKGROUND AND AIMS: Optimization of osmotic dehydration in different plant cells has been investigated through the variation of parameters such as the nature of the sugar used, the concentration of osmotic solutions and the processing time. In micro-organisms such as the yeast, Saccharomyces cerevisiae, the exposure of a cell to a slow increase in osmotic pressure preserves cell viability after rehydration, while sudden dehydration involves a lower rate of cell viability, which could be due to membrane vesiculation...
December 2009: Annals of Botany
Djamila Chabane, Akym Assani, Nadia Bouguedoura, Robert Haïcour, Georges Ducreux
We report here for the first time callus formation from protoplasts in date palm (Phoenix dactylifera L.). Protoplasts were isolated from young leaves of offshoots and embryogenic calli in Deglet nour and Takerboucht genotypes. The protoplast yield depended on genotype, donor plant material, mixture of enzyme solution, and incubation time. With regard to the donor material, the best response was obtained with callus. Cell division was induced in both liquid culture and nurse culture. The best donor material for cell division was callus and the best response was obtained with the feeder layer, which induced a division rate of 30% in Deglet nour and 15% in Takerboucht genotypes...
May 2007: Comptes Rendus Biologies
Ali R Alan, Hongyan Zeng, Akym Assani, Wendy L Shi, Hannah E McRae, Susan J Murch, Praveen K Saxena
An approach of combining flow cytometry (FCM) analysis with morphological and chemical profiling was used to assess the genetic stability and bioactive compound diversity in a Scutellaria baicalensis Georgi (Huang-qin) germplasm collection that was clonally maintained in in vitro for a period of over 6 years. Based on the FCM analysis of nuclei samples from young shoots, the nuclear DNA content of S. baicalensis was calculated as 0.84 pg/2C. FCM analysis showed no significant variation in the nuclear DNA contents and ploidy levels in the long-term in vitro maintained germplasm lines...
August 2007: Plant Cell Reports
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