ISSN:
1573-5060
Keywords:
Solanum tuberosum
;
potato
;
amino acids
;
amino acid analogue resistance
;
frost tolerance
;
plant regeneration
;
proline
;
somaclonal variation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary A number of previously selected hydroxyproline (hyp) resistant cell lines of a diploid potato (Solanum tuberosum L., clone H2578, 2n=2x=24) could be regenerated into plants which were further analysed. Hyp resistance, although lower than in the originally selected calli, was still present in regenerated shoots and in callus initiated from these shoots and it was not lost upon (mini)tuber propagation. Regenerated shoots showed a wide range of phenotypic variation. The chromosome number, analysed in 4 clones, appeared to be hypotetraploid (44 or 45). Tuber-propagated regenerants generally showed increased frost tolerance both at the plant and the cell level. In leaves this seemed to be associated with increased levels of both proline and total amino acid content. However, in callus only the total amino acid content but not proline was still elevated. In the wild type the frost tolerance of the tubers appeared to be lower than that of the leaves. Between tubers of wild type and the hyp resistant regenerants no differences in frost tolerance were found, although proline and total amino acid content tended to be higher in tubers from the regenerants.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00041480
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