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Enhancement of longevity of vegetable crop and wild species seeds at ambient temperature using a liquid preservative

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A liquid preservative (LP), 20% (w/w) CaCl2 in glycerol, was evaluated for its effect on the longevity of seeds of 14 vegetable crops and 12 wild species (moisture contents on fresh weight basis, 9.5 ± 1.2%) in comparison with the same seeds hermetically stored (HS) at ambient temperature 15-45°C. In HS, vegetable seeds lost 50% viability in 1-3 years and complete loss of viability occurred in 2-4 years. The wild species seeds lost 50% viability in 3-8 years and complete loss of viability occurred in 5-12 years. The LP ultra-dried the seeds in a month and maintained an air-free environment. Hence, the viability of seeds of grain amaranth, vegetable amaranth and tomato, and of sessile joyweed, lambsquarters and toothed dock was maintained over 21-24 years of ambient temperature storage. In other species, the length of time over which seed viability was maintained varied. The LP-preserved seeds of six vegetable and two wild species planted in pots outdoors during 2013-2014 formed normal plants and seeds. The performance comparison of these fresh seeds with the LP-preserved seeds in eight species showed decline in performance of the latter by 21 or 24 years. The LP is recommended as a method for simple, low-input seed storage at ambient temperatures.
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Document Type: Research Article

Publication date: December 1, 2016

This article was made available online on October 25, 2016 as a Fast Track article with title: "Enhancement of longevity of vegetable crop and wild species seeds at ambient temperature using a liquid preservative".

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  • Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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