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In order to enhance the seed storability and supply high-quality seeds for vegetation restoration in the arid and semi-arid regions in Northwest China,the effects of ultra-drying and accelerated aging on the physiological characterstics of Melilotus suaveolens seeds were studied.Melilotus suaveolens seeds were dried in a desiccator containing silica gel to 80,53,42,33,23 and 16 g·kg-1 of moisture contents(MC),respectively.The parameters of the seed quality including germination energy(GE),germination percentage(GP),relative conductivity(RC),dehydrogenase activity(DA) and α-amylase activity(AA) were determined after ultra-drying and accelerated aging.The results showed that ultra-dried seeds with 42 g·kg-1 of MC showed the minimum changes of GE and GP before and after seed aging.Moreover,ultra-dry seeds with 42 g·kg-1 of MC showed higher DA and AA,and lower RC than non-ultra-drying seeds.Therefore,ultra-drying to 42 g·kg-1 of MC was helpful for M.suaveolens seed storage.
In order to enhance the seed storability and supply high-quality seeds for vegetation restoration in the arid and semi-arid regions in Northwest China, the effects of ultra-drying and accelerated aging on the physiological characterstics of Melilotus suaveolens seeds were studied. Melilotus suaveolens seeds were dried in a desiccator containing silica gel to 80, 53, 42, 33, 23 and 16 g · kg-1 of moisture contents (MC), respectively.The parameters of the seed quality including germination energy (GE) (GP), relative conductivity (RC), dehydrogenase activity (DA) and α-amylase activity (AA) were determined after ultra-drying and accelerated aging. These results showed that ultra-dried seeds with 42 g · kg -1 of MC showed the minimum changes of GE and GP before and after seed aging. Moreover, ultra-dry seeds with 42 g · kg-1 of MC showed higher DA and AA, and lower RC than non-ultra-drying seeds. Beforefore, ultra- drying to 42 g · kg-1 of MC was helpful for M.suaveolens seed storage.