The effect of microgravity on proton permeability of thylakoid membranes and contribution of II and I photosystems in photosynthetic electron transport in pea chloroplasts.
According to a number investigations microgravity conditions affect membrane apparatus of photosynthesis in cells of higher plants and alga [for review, see Kordyum et al., 1994; Kordyum, 1997]. (see for review). Chloroplasts of space-grown pea plants showed disintegration of grana, shrinkage of the membrane constituting the grana stacks and other structural perturbance of the photosynthetic membranes. However there have been no studies on the effect of microgravity on proton permeability of thylakoid membranes and closely connected with this parameter their photochemical characteristics. The aim of the study is investigation of microgravity effects on protonic permeability of photosynthetic membrane and contribution of photosystem II (PSII) and photosystem I (PSI) in electron transfer from water to potassium ferrycianide (FeCy) in isolated pea chloroplasts. Pea.
Zolotareva
E K
EK
Institute of Botany, Nat. Acad. Sci. of Ukraine, Kyiv.
Onoiko
E B
EB
Sytnik
S K
SK
Podorvanov
V V
VV
D002736:Chloroplasts / Q000502:physiology*; D005292:Ferricyanides; D006112:Gravitation; D006863:Hydrogen-Ion Concentration; D008027:Light; D018532:Pisum sativum; D010785:Photophosphorylation / Q000502:physiology*; D045322:Photosynthetic Reaction Center Complex Proteins; D045331:Photosystem I Protein Complex; D045332:Photosystem II Protein Complex; D010940:Plant Proteins; D017494:Proton Pumps / Q000502:physiology* / Q000528:radiation effects; D012399:Rotation; D020524:Thylakoids / Q000502:physiology; D018474:Weightlessness Simulation
D005292:Ferricyanides; D045322:Photosynthetic Reaction Center Complex Proteins; D045331:Photosystem I Protein Complex; D045332:Photosystem II Protein Complex; D010940:Plant Proteins; D017494:Proton Pumps; C028033:potassium ferricyanide