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Blue Light Induction of Barley Leaf Unfolding. A Phytochrome Reaction?
Author(s) -
DEUTCH BENTE,
DEUTCH† BERNHARD I.
Publication year - 1975
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1975.tb03914.x
Subject(s) - phytochrome , etiolation , blue light , red light , hordeum vulgare , pigment , light energy , biophysics , botany , far red , light sensitivity , darkness , chemistry , biology , poaceae , biochemistry , optics , physics , organic chemistry , enzyme
Low‐energy blue light (450, 475 nm) has been found to induced unfolding of etiolated barley leaves ( Hordeum rulgare cv. Ingrid). This induction can be reversed by far‐red light. Barley leaf unfolding is normally stimulated by red light, reversed by far‐red light, and can be considered to be a typical phytochrome controlled response. It is possible to explain the effects by red and blue light as mediated by the same photoreceptor. The phototransformation of this pigment results in two forms, P 2 and P 4 , to which physiological activity can be ascribed. The red and blue light affect different steps in a cyclical photoconversion. Calculated theoretical dose response curves are presented for such a model in agreement with the experimental data.