High irradiance response promotion of a subsequent light induction response in Sinapis alba L.

摘要: Relative quantum responsivity curves for inhibition of hypocotyl elongation in Sinapis alba L. seedlings previously grown white light confirm that a marked “end day” response can be induced by monochromatic treatment (30 min) at the end period. In dark seedlings, however, no growth 30 min treatment. A prerequisite an induction appears to pretreatment with continuous light. Far red is most effective blue and showing lesser effectiveness. The also shows fluence rate dependency respect its ability allow manifest itself. required all characteristics classical “HIR” response. appearance effect plants treated herbicide SAN 9789 seems exclude chlorophyll as being photoreceptor.