Dark-acclimation of the Chloroplast in Koliella antarctica Exposed to a Simulated Austral Night Condition

摘要: Abstract The acclimation response of the chloroplast was studied in green marine microalga Koliella antarctica exposed to a simulated austral night 90 d. On basis micro- and submicroscopic aspects observed, photosynthetic pigment patterns monitored spectrophotometrically, course assembly PSII chlorophyll-protein complexes evaluated microspectrofluorimetrically vivo on single living cells, it established that alga tolerates stress light absence when cultured laboratory. During treatment, organism undergoes substantial structural functional reorganization plastid, resulting formation chlorochromoplast-like structure, suitable for storage, different times specialized structures, products coming from breakdown pre-existing plastid constituents. whole, dark occurs two steps: first acclimation, quickly realized, during 6 d maintai...