[36] Enhancement and determination of astaxanthin accumulation in green alga Haematococcus pluvialis

The accumulation and metabolism of astaxanthin in Scenedesmus obliquus (Chlorophyceae)

“…Another research focused on the efficiency of pigments and fatty acids extraction from resistant algae using S. obliquus [30] did not detect zeaxanthin and carotene, and ascribed this difference to culturing condition such as incubation mode. On the other hand, our results confirmed conclusion that culturing conditions imposed by nitrogen and phosphate starvation, higher intensity of illumination, salt (KCl and NaCl) and H 2 O 2 could induce and enhance the accumulation of astaxanthin in algal cells [31,32]. At the same time, our results indicated that astaxanthin accumulation was accompanied with the inhibition of cell division (Fig.…”

Optimization of biomass, total carotenoids and astaxanthin production in Haematococcus pluvialis Flotow strain Steptoe (Nevada, USA) under laboratory conditions

“…The accumulation of astaxanthin in cysts under salt stress conditions has been reported both in the dark (Kobayashi et al, 1997b) and in the light (Spencer, 1989;Borowitzka et al, 1991;Boussiba and Vonshak, 1991;Boussiba et al, 1992;Cordero et al, 1996;Harker et al, 1995Harker et al, , 1996a. Although the addition of NaCl in our study was made according to the recommendations of Harker et al (1996a), the mortality of cells increased substantially with the increase of salt concentration, and only 55% of cells survived at 0.8% NaCl (138 mM); similar mortality data were reported by Harker et al (1996b) with 0.6% NaCl (103 mM).…”

Metabolite Profiling and Integrative Modeling Reveal Metabolic Constraints for Carbon Partitioning under Nitrogen Starvation in the Green Algae Haematococcus pluvialis

“…This accumulation is accompanied by massive morphological and metabolic changes (11), (e.g. the alga encysts and produces high amounts of carbohydrates (CHs) and fatty acids (FAs), which can reach up to 65 and 35% of the cell's dry biomass, respectively (6,12). This behavior is unique in that most studied microalgae accumulate either FAs or CHs, but not both, when exposed to stress.…”

“…The freshwater green microalga Hematococcus pluvialis has been extensively studied due to its ability to accumulate the valuable secondary metabolite astaxanthin (6). This ketocarotenoid is a powerful antioxidant used as a food additive for humans and as a colorant in aquaculture (7).…”