A Rapid Increase in Spinach Leaf Fructose 2,6-Bisphosphate Occurs during a Light to Dark Transition.
Spinach leaf fructose 2,6-bisphosphate levels increase rapidly during the first 15 minutes of a normal dark period followed by a gradual decline during the next 5 hours. The regulatory mechanism responsible for the dark-induced rise in fructose 2,6-bisphosphate levels can be counteracted by a brief exposure to light intensities greater than 1 microeinstein per square meter per second.
Baysdorfer
C
C
Plant Photobiology Laboratory, Plant Physiology Institute, Beltsville, Maryland 20705.
Robinson
J M
JM