Wilson, Ruth N., Heckman, John W., and Somerville, Chris R. 1992. Gibberellin Is Required for Flowering in Arabidopsis thaliana under Short Days. Plant Physiology 100: 403-408.
The objective in this project was to determine the role that gibberellin plays in flowering under the “short days” and continuous light conditions. The samples used for growth were the ga1-3 mutant, the gai mutant (gibberellin-insensitive), and the wild-type Landsberg (erecta) line. A short day in this study is defined by 6 hours under cool white fluorescent bulbs and 16 hours of darkness. Continuous light uses the same bulbs, but continuous lights the plants. The application of the hormone gibberellin occurred 17 days after planting; the plants were sprayed “generously” once a week. The controls were sprayed with the solution containing the solvent but not the actual gibberellin component. The results of the study showed the ga1-3 mutant never flowered in short days or continuous light unless gibberellin was added to induce flowering. The gai and WT both flowered in short days. In continuous light, the other mutants grew but ga1-3 was delayed in its initial growth. These results were concluded with the findings that gibberellin plays a role in flowering initiation in Arabidopsis thaliana.
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