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The size and germination of eggplant seed in relation to fruit maturity at harvest, after-ripening and ethylene application

Author(s): Harold Christopher PASSAM | Despoina MAKROGIANNI | Foteini GREGORIOU | Ioannis Christou KARAPANOS

Journal: Analele Universitatii din Oradea, Fascicula Biologie
ISSN 1224-5119

Volume: TOM XVII;
Issue: 2;
Start page: 225;
Date: 2010;
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Keywords: aubergine | Solanum melongena L. | non-climacteric fruit

In eggplant cultivars Black Beauty, Emi, Long Negro and Tsakoniki cultivated for seed, flower induction and flower weight decreased in the presence of developing fruit on the plant. Harvesting prior to maturity (25-35 days after anthesis), aimed at increasing flower induction and fruit set, resulted in small seeds that failed to germinate or germinated poorly. When these fruit were stored for 20 days at 25±30C before seed extraction, seed size and germination increased indicating seed filling and maturation (‘after-ripening’) within the harvested fruit. In year 1, a single application of ethylene before storage increased the germination of Black Beauty and Long Negro harvested 25-35 days after anthesis, but reduced that of Emi and Tsakoniki. In year 2, ethylene application once before the storage of fruits harvested 35 days after anthesis promoted the germination of Tsakoniki and Emi, and when ethylene was applied three times germination was increased further. The possible applications of early harvest, fruit storage prior to seed extraction and ethylene treatment to eggplant seed production are discussed.
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