Assessing genetic stability of a range of terrestrial microalgae after cryopreservation using amplified fragment length polymorphism (AFLP).

Cryopreservation is the long-term, indefinite storage of living biological resources at ultralow temperatures. It is almost universally assumed that cryogenic storage supports genetic and phenotypic stability of organisms. However, certain components of the cryopreservation process, particularly some cryoprotective additives (CPAs) and free radical mediated cryoinjury, may potentially cause genetic alterations.

Methanogenic archaeal community in the sediment of an artificially partitioned acidic bog lake.

Abstract The methanogenic archaeal communities in the sediment of two basins of an artificially partitioned acidic bog lake were studied. In the northeast basin, which was separated from a peat bog, a high methane production rate was measured only in the upper layers of the sediment. In contrast, methane production was detected at various depths of the sediment in the southwest basin, which continuously receiving humic acids from the bog.

PHYLOGENETIC POSITION OF THE OOCYSTACEAE (CHLOROPHYTA).

The complete 18S rRNA gene sequences of three Oocystis A. Braun species (Oocystaceae) and three other chlorococcal algae, Tetrachlorella alternans (G. M.