Premium
Primary Photosynthetic Induction Phenomena in Wheat
Author(s) -
Egnéus Hans
Publication year - 1967
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.1399-3054.1967.tb07187.x
Subject(s) - oxygen evolution , photosynthesis , darkness , oxygen , monochromatic color , botany , anaerobic exercise , chemistry , biology , biophysics , physiology , organic chemistry , electrode , electrochemistry
The induction phenomena of photosynthesis in leaves of wheat were studied with a Beckman oxygen sensor. By special treatment prior to illumination, e.g . long dark and anaerobic periods the oxygen evolution could be divided into two parts, one consisting of two or three transients appearing under the first minute of illumination and one consisting of the main oxygen evolution. One or two transients could be observed when the plant was placed in darkness after an illumination period. The oxygen evolution had the same appearance in monochromatic as in white light. KCN‐treatment inhibited only the main oxygen evolution. The transients are interpreted as being manifestations of the primary processes connected with the start of photosynthesis. The main oxygen evolution is assumed to be closely related to the processes connected to the Calvin‐cycle. Experiments were also performed to ascertain that the observed induction phenomena were not connected with the stomatal movements in the leaves.