The influece of imitated microgravity on the amyloplast structure, the composition and characteristics of potato minituber

Heading: 
Space Life Sciences
1Nedukha, OM, 1Kordyum, EL, 1Schnyukova, EI
1M.G. Kholodny Institute of Botany of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
Kosm. nauka tehnol. 2007, 13 ;(2):062-068
https://doi.org/10.15407/knit2007.02.062
Publication Language: Ukrainian
Abstract: 
The influence of imitated microgravity (clinorotation, 2 rev/min) of long-term duration on the structural-functional organization of Solatium tuberosum L. (cv Adreta) minituber cells is studied. An essential influence on 45-day minituber size, on the content and composition of starch, on the solubility of starch in water and on the structure of amyloplasts in the storage parenchyma of potato minitubers is detected. The following procedures are used: the model system of potato minitubers in sterial culture, the light microscopy, scanning electron microscopy, and biochemical methods for the study of storage polysaccharides. The appearance of a fraction of «gigantic» amyloplasts in starch-storage parenchyma is observed during horizontal clinorotation of long-term duration. The correlation between the decrease of content amylose and the inhibition of starch solubility in water is detected under long-term clinorotation. Our results point to some changes of the carbohydrate metabolism of potato storage organs under the effect of microgravity imitation.
Keywords: biochemical methods, clinorotation, polysaccharides
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