Effect of altered gravity on the mitochondria ultrastructure, activity and fractional composition...

We have earlier demonstrated an essential changeability of the mitochondria concerning of their size, form and matrix density, as well as quantity, size and topography of cristae in Chlorella cells, growing in spaceflight. The likeness of much depositions of the mitochondria rearrangements was revealed under clinorotation. The data about the changes of an intensity respiration of the plants in clinorotation and spaceflight conditions arc present. Dehydrogenases in particular succinatedehydrogenase (SDH), take part in an oxygen metabolism and is the index of an aerobic respiration. It is data, that the mitochondria ultrastructure to a certain degree may be a manifest of their metabolic activity, because SDH was associated with the membranes of the mitochondria cristae. Taking into account above-mentioned information, we have been studying the effect of clinorotation on mitochondria ultrastructure, set of multiple molecular form (MMF) and total activity of SDH during the logarithmic and stationary stages of the culture growth.