Abstract
In a first experiment following a controlled deterioration (CD) protocol proposed by the Millennium Seed Bank Project (MSBP), seeds of six accessions of Solanum macrocarpon were stored at 45°C / 60% RH and seed germination data was taken at intervals for 100 days to estimate comparative seed longevity among the accessions. The mean absolute seed longevity (P50) was 47.41±12.20 days indicating intermediate longevity between the two marker species proposed in the MSBP protocol. In a second experiment, seeds of one accession were stored at seed moisture contents between 2.5 and 11.2% at 10, 20 and 45°C to estimate seed viability constants for S. macrocarpon. Estimates of KE = 5.166, CW = 3.009, CH = 0.094, CQ = 0.0019 were derived, suggesting that the seeds exhibited less sensitivity to storage conditions in terms of KE and CW than the two marker species, but longevity responses to storage temperature were comparable to other orthodox species.
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