Abstract:
:Relative quantum responsivity curves for inhibition of hypocotyl elongation in Sinapis alba L. seedlings previously grown in white light confirm that a marked "end of day" inhibition response can be induced by a monochromatic light treatment (30 min) at the end of the light period. In dark grown seedlings, however, no growth inhibition can be induced by a 30 min monochromatic light treatment. A prerequisite for an induction response appears to be a pretreatment with continuous light. Far red light is most effective with blue and red light showing a lesser effectiveness. The light pretreatment also shows a marked fluence rate dependency with respect to its ability to allow an induction response to manifest itself. The pretreatment required shows all the characteristics of a classical "HIR" response. The appearance of the effect in plants treated with the herbicide SAN 9789 seems to exclude chlorophyll as being the photoreceptor.
journal_name
Plantajournal_title
Plantaauthors
Beggs CJ,Geile W,Holmes MG,Jabben M,Jose AM,Schäfer Edoi
10.1007/BF00387814subject
Has Abstractpub_date
1981-02-01 00:00:00pages
135-40issue
2eissn
0032-0935issn
1432-2048journal_volume
151pub_type
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