Open AccessBlooming of cyanobacteria in turbulent water with steep light gradients: The effect of intermittent light and dark periods on the oxygen evolution capacity of Synechocystis sp. PCC 6803
Author(s) -
Schubert Hendrik,
Matthijs Hans C.P.,
Mur Luuc R.,
Schiewer Ulrich
Publication year - 1995
Publication title -
fems microbiology ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.377
H-Index - 155
eISSN - 1574-6941
pISSN - 0168-6496
DOI - 10.1111/j.1574-6941.1995.tb00180.x
Subject(s) - darkness , biology , cyanobacteria , photosynthesis , oxygen evolution , biophysics , photosystem ii , botany , synechocystis , oxygen , pigment , light intensity , respiration , ecology , bacteria , optics , chemistry , genetics , organic chemistry , electrode , electrochemistry , physics
The influence of intermittent high‐light dosage on Synechocystis sp. PCC 6803 with respect to oxygen evolution capacity, fluorescence yield and carotenoid pigment pattern was investigated, using high‐light‐ and low‐light‐adapted cultures. The results showed that this cyanobacterium was able to survive high light stress for a full day if this stress was applied on and off with intermittently presented recovery periods in darkness. Enhanced respiratory activity in the high‐light adapted cells was detected and this may be an important factor in preventing photodamage under high light stress. Cyanobacterial photosynthetic and respiratory electron transfer pathways are both present within the same membrane, and share common electron carriers. The role of respiratory activity in preventing overexcitation of photosystem 2 is discussed with regard to cyanobacterial ecology.