F. diplosiphon is used to study a wide range of additional physiological and biochemical processes such as “proteome remodeling” in response to nutrient limitation. It is also used to study developmental responses such as gas vesicle formation and phototropism, the ability of an organism to grow in a specific direction in response to the presence or absence of unilaterally applied light. Important biochemical processes are also studied in this species, including chlorophyll and bilin biosynthesis and F. diplosiphon is one of the few prokaryotes that produces both cAMP and cGMP in signal transduction, key signalling molecules in plants and animals. Light responses are important in the process of photosynthesis, which played a critical role in the evolution of our planet, and are necessary for the maintenance of nearly every ecosystem. Moreover an understanding of these physiological processes can contribute to the develop of bioenergy sources.
Fremyella diplosiphon for a systematic study of chromatic adaptation since the organism grows rapidly (25), shows extreme regulation of both phycoerythrin and phycocyanin synthesis (21), grows heterotrophically in the dark (7), and shows little tendency to clump or adhere to surfaces during growth in liquid culture.