Details

Autor(en) / Beteiligte

• Gan, Fei
• Zhang, Shuyi
• Rockwell, Nathan C.
• Martin, Shelley S.
• Lagarias, J. Clark
• Bryant, Donald A.

Titel

Extensive remodeling of a cyanobacterial photosynthetic apparatus in far-red light

Ist Teil von

• Science (American Association for the Advancement of Science), 2014-09, Vol.345 (6202), p.1312-1317

Ort / Verlag

United States: American Association for the Advancement of Science

Erscheinungsjahr

2014

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• Cyanobacteria are unique among bacteria in performing oxygenic photosynthesis, often together with nitrogen fixation and, thus, are major primary producers in many ecosystems. The cyanobacterium, Leptolyngbya sp. strain JSC-1, exhibits an extensive photoacclimative response to growth in far-red light that includes the synthesis of chlorophylls d and f. During far-red acclimation, transcript levels increase more than twofold for ~900 genes and decrease by more than half for ~2000 genes. Core subunits of photosystem I, photosystem II, and phycobilisomes are replaced by proteins encoded in a 21-gene cluster that includes a knotless red/far-red phytochrome and two response regulators. This acclimative response enhances light harvesting for wavelengths complementary to the growth light (λ = 700 to 750 nanometers) and enhances oxygen evolution in far-red light.