Culturing and Cyanobacteria Flashcards
Group of freshwater algae particularly suited to biotech
Chlorella
Batch culture
Closed system with limited nutrients and space
Phases of growth curve
Lag phase, log phase, stationary phase, death phase
Chemostat
Culture system where fresh media/nutrients introduced and media/algae withdrawn at a constant rate
Turbidostat
Similar to chemostat but will capability to maintain constant cell density
Cyanobacteria
Gram-negative prokaryotic bacteria that obtain energy via photosynthesis
Oxyphotobacteria
Obtain energy via light and release oxygen as a byproduct
Prokaryotic
No nucleus or membrane-bound organelles
Binary fission
Asexual reproduction where cells divide into two identical daughter cells
Model cyanobacteria
Synechocystis
Heterocyst
Cell specialized in nitrogen fixation
Akinete
Cyanobacterial resting spore with a thick cell wall and reserves of N and sugars
Horgomonia
Short motile chains of filamentous algae released from parent
Necridia
Cells that undergo apoptosis to detach horgomonia
Carboxysome
Protein compartment in cyanobacteria that houses Rubisco
Phycobilisome
Highly ordered protein-pigment complex used by cyanobacteria, red algae, and glaucophytes
Phycobilins
Chromophores (molecules that absorb light)
Antenna compexes
Phycobilins in disc-shaped stacks to maximize light harvesting
Complementary chromatic adaptation
Ability to change pigment composition of phycobilisomes to catch more photons based on environment
Filamentous cyanobacteria important in nutrient-poor tropical waters
Trichodesmium
