title: Endogenous abscisic Acid levels in germinating and nongerminating lettuce seed.
abstract: The concentrations of abscisic acid in Grand Rapids lettuce (Lactuca sativa L.) seeds imbibed under conditions which promote or inhibit germination were determined by electron capture-gas chromatography. The concentration of abscisic acid in dry seeds was 12 to 14 nanograms per 100 milligrams. During 24-hour imbibition, the abscisic acid content diminished more rapidly during conditions which allow germination (25 C in light) than in conditions which inhibited germination (35 C in light or darkness at 25 C). A decrease in endogenous levels of abscisic acid was not always correlated with germination.
authors: New York State Agricultural Experiment Station, Cornell University, Geneva, New York 14456.
authors: J W
authors: JW
authors: Braun
authors: A A
authors: AA
authors: Khan