Premium
THE PHOTOTROPIC RESPONSES OF AVENA COLEOPTILES
Author(s) -
Blaauw O. H.,
BlaauwJansen G.
Publication year - 1970
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1970.tb00177.x
Subject(s) - phototropism , coleoptile , avena , stimulus (psychology) , physics , optics , chemistry , mathematics , biophysics , biology , psychology , botany , blue light , cognitive psychology
SUMMARY The various phototropic curvatures of the oat coleoptile are presented in a three‐dimensional diagram. Three positive responses can be distinguished, separated by areas of negative or at least decreased curvatures. The reciprocity law is valid for two of the positive responses and one negative response. A third positive response is initiated over a large range of intensities at a fixed stimulus duration. The slope of its increase with stimulus duration, however, depends on light intensity.