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    Effect of salt stress on germination and seedling growth in serially harvested aubergine (Solanum melongena L.) seeds during development
    (Laser Pages Publ Ltd, 2003) Demir, I; Mavi, K; Ozcoban, M; Okcu, G
    Serially harvested aubergine (Solanum melongena L.) seed lots of 40, 45, 50, 55, 60, and 42, 45, 50, 55, 60, 70, and 80 days after anthesis (daa) in 1999 and 2000, respectively, were incubated and germinated in 0, 35, 70, and 140 mM NaCl in order to assess the effect of salt stress on germination and seedling growth in relation to seed development. Germination percentage, total and normal emergence, and seedling fresh and dry weight were all inhibited by NaCl treatment. The strongest inhibition of germination occurred in earlier (40, 42, 45 daa) and later (70, 80 daa) harvests and at 140 mM NaCl. Seedling growth was more sensitive to salt stress than was germination. Seedling abnormalities, (chlorosis, cotyledon unfolding, necrotic areas) increased at higher NaCl concentrations. Results indicated that the developmental stage of seeds affected sensitivity to salt stress. In order to get the maximum germination, and rapid and well-developed transplant production, aubergine seeds should be harvested between 50 and 60 daa. A mixture of seeds at various developmental stages, particularly a high proportion of immature and overmature seeds in a once-over mechanical harvest, reduces the overall performance of the lot under salt stress.
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    Öğe
    Seed development and maturation in aubergine (Solanum melongena L.)
    (Eugen Ulmer Gmbh Co, 2002) Demir, I; Mavi, K; Sermenli, T; Ozcoban, M
    Changes in seed quality were monitored during seed development and maturation in aubergine (Solanum melongena L. cv. 'Pala') in open-field experiments in 1999 and 2000. Seed quality of serially harvested seed lots was assessed by a number of different tests (germination, emergence, seedling dry weight, electrical conductivity, cold test, K, (seed lot constant), germination at low (18degreesC) and high (30degreesC) temperatures). Mass maturity (the end of the seed-filling phase) occurred 40 day's after anthesis (DAA) in 1999 and 42 DAA in 2000. In contrast, maximum seed quality was attained 50 and 60 DAA which was 10 and 20d and 8 and 28d after mass maturity (DAMM) in 1999 and 2000, respectively, which varied between quality tests. Results provide further evidence that the hypothesis that seed quality is maximal at the end of the seed filling-phase and declines thereafter is not applicable for aubergine.