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Action Spectra for the Transient and the Normal Photosynthetic Oxygen Evolution in Wheat Leaves
Author(s) -
Egnéus Hans
Publication year - 1968
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.1399-3054.1968.tb07285.x
Subject(s) - action spectrum , photosynthesis , oxygen evolution , oxygen , spectral line , chlorophyll , absorption spectroscopy , wavelength , chemistry , oxygen deficiency , photochemistry , botany , biology , optics , physics , astronomy , electrode , organic chemistry , electrochemistry
An action spectrum within the wavelength region 430–700 nm has been determined for an oxygen Iransient isolated from the main photosynthetic oxygen evolution in wheat leaves. the spectrum follows the absorption spectrum of chlorophyll b . In order to compare this oxygen evolving process with the normal photosynthetic oxygen evolution, an action spectrum for this later process was also determined but only in the wavelength region 600–700 nm. This action spectrum closely corresponds to other action spectra for the photosynthetic oxygen evolution found in the literature. The behaviour of the oxygen transient after various treatments was also studied. It was found that the transient oxygen evolution was influenced by the dark period between irradiations, and by a previous irradiation with a wavelength longer than 695 nm, both conditions having a promoting effect on the oxygen evolution. The action spectra and the other findings are discussed on the basis of the two‐pigment hypothesis.