Active oxygen species transiently suppress the synthesis of the chloroplast encoded Rubisco LSU
Excess light intensities are the source of oxidizing activity in the chloroplast (1). Photoinhibitory effects can also be observed upon immediate shifts from low to high light intensities, that create an imbalance between the antenna size and the excess amount of light. Most plants have the capacity to recover from light stress through the process of photoacclimation which involves increased synthesis of D1 and the CO2 fixing enzyme Rubisco, the most abundant, but slowly turned-over chloroplast protein (2).
Key wordsChlamydomonas chloroplast genes light stress Rubisco active oxygen molecular biology
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- 2.Anderson. J. M. & Osmond, C. B. (1987). In Shade-sun responses: Compromises between acclimation and photoinhibition. Elsevier, Amsterdam. pp. 1–38.Google Scholar