1970
Third positive (C-TYPE) phototropism in the Avena coleoptile
Publication
Publication
Acta botanica neerlandica , Volume 19 - Issue 5 p. 764- 776
The third (C-type)1 response results from a tonic and a tropistic effect of the irradiation. The Bunsen-Roscoe reciprocity law applies to the tonic as well as to the tropistic component. A simple dependence on the duration of the stimulus does not exist, but is simulated by the time interval required for effectuation of the tonic component. It is concluded that the C-type curvature is identical with the first positive curvature, but is evoked by larger doses of unilateral light because of a desensibilisation of the coleoptiles by the tonic effect of the long unilateral irradiation itself. This desensibilisation process takes a minimum period of 4 resp. 15 minutes to be effective with red-preirradiated or dark-cultivated coleoptiles, respectively.
Additional Metadata | |
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Acta botanica neerlandica | |
CC BY 3.0 NL ("Naamsvermelding") | |
Organisation | Koninklijke Nederlandse Botanische Vereniging |
O.H. Blaauw, & G. Blaauw-Jansen. (1970). Third positive (C-TYPE) phototropism in the Avena coleoptile. Acta botanica neerlandica, 19(5), 764–776. |