Different characteristics of C-PHYCOCYANIN (cas 11016-15-2) (C-PC) in two strains of the extremophilic Galdieria phlegrea

Add time:08/22/2019    Source:sciencedirect.com

To date, the main source for phycocyanin production is the thermophilic cyanobacterium Spirulina platensis, although latest researches are exploring the possibility to exploit the thermoacidophilic Cyanidiophyceae (Rhodophyta) to this purpose. Galdieria phlegrea is a polyextremophilic red alga belonging to Cyanidiophyceae, colonizing, along with G. sulphuraria, acidic and thermal environments and distinguishable from this latter on the base of molecular and ecophysiological traits. In the present paper, a characterization of C-PHYCOCYANIN (cas 11016-15-2) from two strains of G. phlegrea with different geographic provenance (Phlegrean Fields Naples, Italy; Diyadin, Turkey) was provided under autotrophic and heterotrophic conditions. The results showed different optimal pHs and thermostability between the strains and between autotrophic and heterotrophic cells. What is intriguing, a pre-heating at 70 °C of heterotrophic cells from the Italian strain resulted in a highly heat-resistant of C-phycocyanin. We hypothesized that the different features of this pigment, currently widely used for various applicative purposes, are related to the habitat from which the microalga comes from.

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