Light-induced increase in sucrose phosphate synthetase activity in leaves of Lolium temulentum

Mature leaves of Lolium temulentum L. were assayed for sucrose phosphate synthetase activity at different times during the photoperiod. There was a rapid increase in activity at the onset of illumination which was not observed in leaves maintained in darkness. The activity prior to illumination was...

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Bibliographic Details
Published in:Annals of botany 1985-04, Vol.55 (4), p.593-596
Main Authors: Pollock C.J, Housley, T.L
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biosynthesis
Carbon
Crop harvesting
darnel
enzyme activity
Enzymes
Fundamental and applied biological sciences. Psychology
Leaves
light
Lolium temulentum
Lolium temulentum L
Metabolism
Phosphates
photoperiod
Physiological regulation
Plant biochemistry
Plant physiology and development
Plants
starch
Starches
sucrose
sucrose phosphate synthetase
sucrose synthase
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Summary:Mature leaves of Lolium temulentum L. were assayed for sucrose phosphate synthetase activity at different times during the photoperiod. There was a rapid increase in activity at the onset of illumination which was not observed in leaves maintained in darkness. The activity prior to illumination was insufficient to catalyse the rates of sucrose synthesis observed in illuminated detached leaves; after 15 min illumination the two processes were of similar magnitude.
ISSN:0305-7364
1095-8290
DOI:10.1093/oxfordjournals.aob.a086934