sodininkystė ir daržininkystė 25(4)

mersonii Dun. in vitro culture after low (+6°C) temperature adaptation were investigated.
There have discovered interspecific differences of SOD isoenzyme profiles
in paternal forms – S. commersonii, S. tuberosum. The hybrids inherited the SOD
profiles with 6 isoforms from the recipient S. tuberosum cv. ‘Matilda’, while from
donor, a wild species S. commersonii, SOD-1 isoenzymes were inherited. However,
the SOD activity studies showed that SOD activity of the interspecific hybrids was
higher than of S. tuberosum cv. ‘Matilda’, but lower than of S. commersonii Dun.
species. After 14 and 21 days of adaptation in all plants the reduction of photosynthetic
pigments and increase in the SOD activity were observed, but in the hybrid
H323 SOD activity was slightly decreasing. Probably, the reduction of isoenzymatic
SOD activity in the hybrid H323 is not completely related with the adaptation to low
temperature inherited from S. commersonii. High level of SOD activity in the hybrid
H188 allow the statement that, perhaps, SOD isoenzymes participated in the process
of plant adaptation to low temperature.
Key words: SOD – superoxide dismutase, S. commersonii Dun., S. tuberosum
c. ‚Matilda’, interspecific hybrids.
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