Possible significance of changes in the light requirement of Cirsium palustre seeds after dispersal in ash coppice

摘要: Abstract. It is demonstrated that after the feelling of ash coppice Cirsium palustre becomes established from seed was produced during previous cycle and has lain underground for several years. These seeds are light-requiring it probable their germination triggered by exposure to light coppicing in winter. It assumed become because phytochrome far-red absorbing form high. This facilitates incorporation bank summer. However, disappearance Pfr inhibited at low temperatures; this means can store stimulus winter will not germinate until they experience higher temperatures spring. The significance inhibition under a leaf canopy enhances chance being incorporated soil bank.