Storage behavior of the endangered alpine conifer Abies nephrolepis Maxim.
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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