PMID: 5908631Feb 1, 1966

Light induced concentration changes of adenosine-triphosphate in phycomyces sporangiophores

Plant Physiology
W Shropshire, R H Gettens


The concentrations of extractable adenosine triphosphate (ATP) following the induction of positive light-growth responses in Phycomyces sporangiophores by blue light stimuli have been measured by means of the luciferin-luciferase assay. The ATP concentration in the light-sensitive growing zone increases 30 to 50% within 30 seconds after the start of a light stimulus and returns to the normal adapted level within 1 minute after stimulation. The ATP concentration is constant for any level of light adaptation and is uniform along the length of sporangiophores even though the light sensitivity is confined to a growing zone less than 5 mm long. These results suggest that one of the initial biochemical steps after a light stimulus is the production of extractable ATP.


Sep 1, 1952·Archives of Biochemistry and Biophysics·B L STREHLER, J R TOTTER
Apr 1, 1956·Biochimica Et Biophysica Acta·A A GREEN, W D MCELROY
Sep 1, 1959·Archives of Biochemistry and Biophysics·W M BALFOUR, F E SAMSON

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