Impact of seed moisture content and storage temperature on seed germination ability of selected plant species
1997
Skaloud, V. | Stehno, Z. (Vyzkumny Ustav Rostlinne Vyroby, Praha (Czech Republic))
Regulation of two basic factors of storage conditions, air temperature and seed moisture, is considered a prerequisite of long-term storage of seed in a seed bank. In a set of seed belonging to 7 species differences in storability were found dependent on species, storage and seed moisture. When importance of particular factors was evaluated, distinct differences were determined among plant species. In some cases, differences induced by duration of storage were found. It was observed that the longer the period of storage (already 43 day extension was markedly expressed), the lower the final germination. Storage temperature had a specific influence; a rapid decrease of germination was found in seed stored at +40 degrees C and a noticeable decrease in many species stored at +18 degrees C. No marked difference was found in overall evaluation of differences between temperatures of -18 degrees C and +4 degrees C; only germination of ryegrass and Amaranthus seed was higher at -18 degrees C than at +4 degrees C. Relatively small differences were caused by seed moisture. Non-dried seed (11-13 %) had obviously low germination ability. There were inconsiderable differences between two levels of seed moisture (2-5 % and 6-8 %) only in seed with higher oil content (seed rape, poppy). Deep drying (2-5 %) was more efficient for maintenance of seed germination than standard drying (6-8 %). Tested species can be divided into three categories: 1, highly susceptible to accelerated ageing without regard to the previous storage, 2: susceptible to induced ageing only under particular conditions of storing - seed rape, 3: relatively less susceptible to accelerated ageing - ryegrass, Amaranthus
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