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The Influence of Protochlorophyllide, Formed from Exogenous δ‐Aminolevulinic Acid, on Chlorophyll Synthesis in Leaves during Flash Illumination
Author(s) -
Steer B. T.
Publication year - 1970
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.1399-3054.1970.tb06441.x
Subject(s) - protochlorophyllide , chlorophyll , pigment , chemistry , absorption (acoustics) , chlorophyll a , biochemistry , in vivo , photochemistry , biophysics , botany , biology , chloroplast , organic chemistry , materials science , composite material , gene , microbiology and biotechnology
In the presence of large accumulations of protochlorophyllide, derived from exogenous δ‐aminolevulinic acid, chlorophyll synthesis in excised leaves of two varieties of barley was less than in untreated leaves. In oat leaves the accumulated protochlorophyllide, from exogenous δ‐laminolevulinic acid, stimulated chlorophyll synthesis to above the control level. — These relationships could only be demonstrated when phtodestruction of pigments was minimised by the use of flash illumination (2 milliseconds every 3 minutes). — These was no evidence from in vivo absorption spectra that the pigments in the barley leaves were different to those in leaves studied by other workers. However, the presence of the accumulated protochlorophyllide appeared to prevent the shift of the chlorophyll absorption maximum from 673 nm to 677 nm. — Possible mechanisms of inhibition are discussed.