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- W1998429223 abstract "Long‐term storage strategies for seed germplasm are needed to assure preservation of diminishing plant genetic resources. Cryopreservation in liquid nitrogen (−196°C) is being studied as a potential method to reduce the rate of seed deterioration and thus increase the storage life of the seed. Onion ( Allium cepa L.) seed was stored for 10 yr at 5, −18, and −196°C (liquid nitrogen) and evaluated for germination, seedling root length, electrolyte leakage, and O 2 uptake to determine long‐term storage response. Average germination of seed stored at −18 and −196°C did not decline over the 10 yr period, while germination of seed stored at 5°C dropped from 94 to 68%. Variation in moisture content was observed in seed stored at 5 and −18°C, with no variation noted at the −196°C‐storage temperature. The variation in moisture content may have influenced seed deterioration at the 5°C‐storage temperature. It is less likely that the variation in seed moisture content was a contributing factor at the −18°C‐storage temperature. Electrolyte leakage results, an indication of seed membrane integrity, were inconclusive. Average seedling root lengths of 2.8, 5.7, and 6.6 mm and seedling O 2 uptake rates of 124, 156, and 176 pmol mg −1 min −1 (5, −18, and −196°C storage, respectively) were observed, suggesting less physiological deterioration at the −196°C‐storage temperature. Based on seedling root length, O 2 uptake rates, maintenance of seed moisture content and seed germination, it was concluded that seed deterioration was greater at 5 > −18 > −196°C. Maintenance of seed germplasm at 5°C in this experiment was not satisfactory. Liquid nitrogen and −18°C storage for up to 10 yr was acceptable. Cryopreservation of seed germplasm appeared to result in superior seed vigor compared with the −18°C storage; however, longer‐term experiments are needed to determine if cryopreservation results in extended seed preservation." @default.
- W1998429223 created "2016-06-24" @default.
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- W1998429223 date "1995-05-01" @default.
- W1998429223 modified "2023-10-16" @default.
- W1998429223 title "Evaluation of Onion ( Allium cepa L.) Seed after 10 Years of Storage at 5, −18, and −196°C" @default.
- W1998429223 doi "https://doi.org/10.2135/cropsci1995.0011183x003500030036x" @default.
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