Storage behavior of the endangered alpine conifer Abies nephrolepis Maxim.
Abies nephrolepis (Trautv. ex Maxim.) is an endangered alpine coniferous tree that is known to require internal and external preservation. Whether its seeds can be stored at long-term storage conditions (-20°C, 40% RH or below) remains unclear. Whether seeds can be stored at long-term storage conditions could be determined according to their storage behaviour. Only orthodox seeds can store long-term under the above conditions. Therefore, this study was conducted to identify storage behaviors of endangered alpine coniferous seeds for a safe storage. In 2019, seeds of sapling trees were collected from Pyeongchang-gun, Gangwon-do. Equilibrium relative humidity of these seeds was measured immediately after collection and the condition of these seeds was confirmed through a vitality test. To determine the storage behaviour, the moisture content was measured under five conditions (temperature of 15°C and relative humidity of 15, 20, 30, 40, and 50%). Change in vitality according to drying was confirmed. The vitality test was conducted in the following order: X-ray test, germination under 10 temperature conditions between 5 and 35°C, and TZ test of ungerminated seeds. Immediately after collection, the equilibrium relative humidity (eRH) of seed was around 43% and seed vitality was 52.5 ± 16.0%. The highest vitality (50.0 ± 5.8%) was identified under 15% equilibrium relative humidity. It was not significantly different from the vitality immediately after collection. At this time, the moisture content was about 4.33% F.wt. This shows the characteristics of an orthodox seed that does not lose vitality even when it is dried under 15% relative humidity. This means that these seeds can be stored under long-term storage conditions (-20°C, 40% RH or less) after drying. To verify the storage behaviour of Abies nephrolepis - Orthodox - dry seeds at 15°C and relative humidity of 15%, seeds are stored at -20°C for 3 months to check the change in vitality. Keywords: Biodiversity conservation, Climate change, Agriculture, Deforestation and forest degradation ID: 3623102
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| Format: | Document biblioteca |
| Language: | English |
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FAO ;
2022
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| Online Access: | https://openknowledge.fao.org/handle/20.500.14283/CC2590EN http://www.fao.org/3/cc2590en/cc2590en.pdf |
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