Home • Galdieria sulphuraria 074W
Galdieria sulphuraria
Microscope image of Galdieria sulphuraria. Credit: Gerald Schoenknecht, from NSF.

The genome sequence and gene models of Galdieria sulphuraria 074W have not been determined by the JGI, but were downloaded from NCBI, on March 27, 2018. In order to allow comparative analyses with other genomes sequenced by the Joint Genome Institute, a copy of this genome is incorporated into the JGI Genome Portal. Please note that this copy of the genome is not maintained by NCBI and is therefore not automatically updated.

The following text is from LANL Greenhouse: https://greenhouse.lanl.gov/greenhouse/organisms/

Galdieria sulphuraria 074W

Galdieria sulphuraria is a unicellular red alga found in hot sulphur springs. It is acido-thermophilic and can grow both autotrophically and heterotrophically in the dark. Other than living in extreme conditions of temperature and acidity, it can also tolerate high concentrations of metal ions. All these characteristics make it an ideal organism for genome sequencing and understanding the process of adaptation to extreme conditions and also genome evolution.The estimates for the genome size of Galdieria sulphuraria vary, depending on the method used, around 10 Mbp (Muravenko et al. 2001; Moreira et al., 1994) and 17 Mbp. There are also conflicting reviews on the chromosome number, ranging from 2 (Muravenko et al., 2001) to 40 (Moreira et al., 1994).

Genome Reference(s)


  1. Muravenko, O., Selyakh, I., Kononenko, N., and Stadnichuk, I. Chromosome numbers and nuclear DNA contents in the red microalgae Cyanidium caldarium and three Galdieria species. (2001) European Journal of Phycology, 36:3, 227-232.
  2. Moreira, D., Lopez-Archilla, A., Amils, R., and Marin, I. Characterization of two new thermoacidophilic microalgae: Genome organization and comparison with Galdieria sulphuraria. (1994) FEMS Microbiology Letters 122:109-114.