June 2016 – Cryopreservation paving the way for desiccation sensitive seeds.
Desiccation sensitive seeds in New Zealand Long-term preservation of seeds under the standard conditions of seed banks (i.e. dried to equilibrium in a controlled environment of 5–20°C and 10-25% of relative humidity, and stored at a temperature of –18±3 °C and relative humidity of 15±3 %) is only feasible for orthodox (desiccation-tolerant) seeds (FAO, 2014). However, a large number of species cannot be preserved under these conditions, as is the case for species producing desiccation sensitive (recalcitrant) seeds.
About 20-25% of the seeded plants of the world produce non-orthodox seeds. But, since the proportion of recalcitrant seeds is habitat dependent, recalcitrance acquires greater importance in particular habitats, such as tropical evergreen rain forests. Here it has been hypothesized that ca. 47% of the indigenous flora may produce recalcitrant seeds (Tweddle et al., 2003; Daws et al., 2006).
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Last updated on Monday 29 November 2021