Induction of dark dormancy in seeds : its importance for the seed bank in the soil

摘要: Exposure to light breaks dormancy in seeds of many species. Dark prevents germination the soil, which could otherwise be fatal. However, may not dark dormant upon dispersal, or exposure stimulatory doses before burial still cause germinate soil. The induction when was inhibited during incubation polyethylene glycol has been investigated three process faster at high than low temperatures. In Origanum vulgare L. re-established rather slowly. Disappearance phytochrome far-red absorbing form (Pfr) and re-establishment control, from had escaped, were involved. Induction much Plantago major L., due a reduction responsiveness light, absence escape control threshold level Pfr for breaking dormancy. Not all 0. P. lanceolata initially dormant; requirement induced former, but c 25% latter importance these findings formation seed bank soil