Cold-induced changes in protein patterns and ultrastructure of root cells of maize seedlings
1996
Gasparikova, O. | Ciamporova, M. | Tamas, L | Trginova, I. | Luxova, M. (Slovenska Akademia Vied, Bratislava (Slovakia). Botanicky Ustav)
Low temperature effects on the soluble and membrane-associated protein patterns and ultrastructure of primary root meristematic cells of two Zea mays L. genotypes, the cold-tolerant Z7 and the cold-sensitive Penjalinan, were studied. The aim was to identify polypeptides and ultrastructural characteristics which might be specifically associated with the development of chilling tolerance in maize. It was concluded that the chilling temperature did not damage the root cell organelles responsible for protein synthesis and intracellular transport in either genotype. Differences in membrane proteins demonstrate that cellular membranes of maize roots are in a dynamic state, changing their surface activity together with their internal molecular organization in response to environmental temperatures. Similarity of the changes in the roots of chilling-sensitive and chilling-tolerant genotypes indicates that not all these changes may be responsible for the increase in chilling tolerance. Some might be involved in the adjustment of physical and functional properties of the membranes to low temperatures and also in root growth retardation caused by environment
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