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Interactions between Abscisic Acid, Gibberellins and Cytokinins in Grand Rapids Lettuce Seeds Germination
Author(s) -
POGGIPELLEGRIN MARIECHRISTINE,
BULARD CAMILLE
Publication year - 1976
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.1399-3054.1976.tb05025.x
Subject(s) - gibberellin , cytokinin , darkness , lactuca , abscisic acid , germination , botany , gibberellic acid , chemistry , biology , auxin , biochemistry , gene
Experiments with Grand Rapids lettuce seeds ( Lactuca sativa L.) maintained in darkness or irradiated with red light have shown that the inhibition of germination induced by low concentrations of ABA (2, 4, 6 μ M ) could be overcome by gibberellins (GA 3 or GA 4 ). The same results were obtained, although to a lesser extent, under the influence of two out of the four cytokinins tested (K and BAP) for seeds maintained in darkness. To suppress the block induced by higher concentrations of ABA (for example 8 μ M ), it was necessary to apply a cytokinin (K, BAP, Z or 2iP) and a gibberellin (GA 4 or GA 3 ) simultaneously, or a cytokinin following a red light treatment. Experiments conducted in darkness in which ABA (8 μ M ) was applied together with a cytokinin (BAP) and a gibberellin (GA 4 ) showed that the gibberellin and the cytokinin played similar roles towards each other and towards ABA.