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The effect of chlorophyll content on changes of photochemical reactions in intact kidney bean leaves
Author(s) -
KOIZUMI M.,
KANO H.,
KATSURA N.,
INADA K.
Publication year - 1990
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/j.1365-3040.1990.tb01300.x
Subject(s) - chlorophyll , photochemistry , chemistry , greening , chlorophyll a , absorption (acoustics) , absorption spectroscopy , materials science , biology , biochemistry , organic chemistry , optics , ecology , physics , composite material
. Activation spectra of photochemical reactions were measured by a flash spectrophotometer in leaves having varying chlorophyll contents at different stages of greening. The increase of chlorophyll concentration up to 30 nmol cm ‐2 elevated the rates of photochemical reactions at all wavelengths of light used, and was found to be produced by an increase in the amounts of reaction centres. Further accumulation of chlorophyll up to 40 nmol cm ‐2 was associated with an increase in light‐harvesting chlorophyll, an improved rate of photochemical reactions around 600 nm and at 700 nm, and self‐absorption and screening effects where chlorophyll absorbed maximally (400–450 nm and around 680 nm).