Journal
HORTICULTURAL SCIENCE
Volume 42, Issue 2, Pages 61-69Publisher
CZECH ACADEMY AGRICULTURAL SCIENCES
DOI: 10.17221/186/2014-HORTSCI
Keywords
genotype; in vitro preservation; plant genetic resources; Prunus
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Funding
- Regional Government of Sicily, Italy
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In this study, in vitro slow growth storage was investigated in four cultivars of two Sicilian (Southern Italy) plum species (Prunus domestica L. and Prunus cerasifera Ehrh. -two genotypes each). Established shoot cultures were preserved at 4 degrees C in the dark in a Murashige and Skoog basal medium containing one of two different concentrations of sucrose (20 and 30 g/l) and with or without growth regulators. We tested the effects of cold storage, genotype and media on survival and re-growth capacity of explants after 3, 6, 9 and 12 months of storage. Effective minimal growth under cold conditions occurred in all four genotypes. The media composition did not affect survival, which, instead, appeared to be genotype-dependent. P. domestica genotypes survived cold storage the longest, for 12 and 9 months; instead, P. cerasifera ones remained viable for up to 6 months. All genotypes retained proliferation capacity under standard conditions and their re-growth capacity seems to be strongly genotype-dependent, closely related to their individual performance in response to the experimental condition of storage.
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